---
product: Chilkat
product_version: 11.7.0
language: dataflex
language_label: DataFlex
class: JsonArray
license: free
deprecated: false
reference_html: https://www.chilkatsoft.com/refdoc/dataflexJsonArrayRef.html
---
# Chilkat JsonArray — DataFlex — v11.7.0

> Chilkat 11.7.0 · language=dataflex · class=JsonArray
> Other versions: replace `11.7.0` in this URL. Other languages: `https://www.chilkatsoft.com/ai-docs/v/11.7.0/<lang>/classes/JsonArray.md`.
> Language-wide rules (install, unlock, error model, strings/bytes): `https://www.chilkatsoft.com/ai-docs/v/11.7.0/dataflex/guide.md`.

## Purpose

**Read, modify, search, and emit ordered JSON arrays.**

`Chilkat.JsonArray` is the JSON array companion to `Chilkat.JsonObject`. It represents an ordered list of JSON values and provides index-based methods for reading, inserting, replacing, deleting, swapping, searching, and emitting array data. It supports scalar values, nested objects, nested arrays, date/time parsing, exact numeric string handling, compact or pretty output, and search helpers for arrays of strings or arrays of objects.

**Ordered JSON values**

Work with JSON arrays as ordered lists containing strings, numbers, booleans, nulls, objects, arrays, and mixed value types.

**Index-based access**

Retrieve, insert, replace, delete, or swap values by array index when processing JSON list data.

**Nested objects and arrays**

Access child `JsonObject` and `JsonArray` values to navigate and modify deeper JSON structures.

**Search helpers**

Search arrays of strings or arrays of objects to locate matching values without manually scanning every element.

**Date and numeric handling**

Parse date/time values and preserve exact numeric strings when JSON data contains values that must not be rounded or reformatted.

**Emit JSON output**

Produce compact or pretty JSON output after array data has been loaded, edited, searched, or built programmatically.

**Common pattern:** Use `JsonObject` to navigate named members and JSON paths, then use `JsonArray` to iterate or modify ordered lists found within the object tree. Retrieve nested objects or arrays as needed, update values by index, and emit the final JSON in compact or pretty form.

For an extended overview, see [JsonArray Class Overview](https://www.chilkatsoft.com/jsonarray_class_overview.asp).

## Object creation, unlocking and error handling

**Object Creation**

```dataflex
// (Dataflex programs use the 32-bit Chilkat ActiveX)
Handle hoJsonArray
Get Create(RefClass(cComChilkatJsonArray)) to hoJsonArray
```

Call `Global.UnlockBundle` once at the start of the program, before using this or any other Chilkat class. Any string unlocks a fully functional 30-day trial; a purchased unlock code is used in production. See `guide.md` for the exact code in DataFlex.

How failure is reported depends on the method's return type and is stated in the note under each method below. In every case the diagnostic text is in the `LastErrorText` property of the object whose method was called.

## Members common to every Chilkat class

Documented once per language in `common-members.md`; listed here so this page is self-contained.

| Property | Signature | Access | Meaning |
|---|---|---|---|
| `DebugLogFilePath` | `Function ComDebugLogFilePath Returns String Procedure Set ComDebugLogFilePath String value` | read/write | If set to a file path, this property logs the LastErrorText of each Chilkat method or property call to the specified file. |
| `LastBinaryResult` | `Function ComLastBinaryResult Returns Variant` | read-only | This property is mainly used in SQL Server stored procedures to retrieve binary data from the last method call that returned binary data. |
| `LastErrorHtml` | `Function ComLastErrorHtml Returns String` | read-only | Provides HTML-formatted information about the last called method or property. |
| `LastErrorText` | `Function ComLastErrorText Returns String` | read-only | Provides plain text information about the last called method or property. |
| `LastErrorXml` | `Function ComLastErrorXml Returns String` | read-only | Provides XML-formatted information about the last called method or property. |
| `LastMethodSuccess` | `Function ComLastMethodSuccess Returns Boolean Procedure Set ComLastMethodSuccess Boolean value` | read/write | Indicates the success or failure of the most recent method call: `True` means success, `False` means failure. |
| `LastStringResult` | `Function ComLastStringResult Returns String` | read-only | In SQL Server stored procedures, this property holds the string return value of the most recent method call that returns a string. |
| `LastStringResultLen` | `Function ComLastStringResultLen Returns Integer` | read-only | The length, in characters, of the string contained in the LastStringResult property. |
| `VerboseLogging` | `Function ComVerboseLogging Returns Boolean Procedure Set ComVerboseLogging Boolean value` | read/write | If set to `True`, then the contents of LastErrorText (or LastErrorXml, or LastErrorHtml) may contain more verbose information. |
| `Version` | `Function ComVersion Returns String` | read-only | Version of the component/library, such as "10.1.0" |

## Member index

| Member | Kind | Signature |
|---|---|---|
| `EmitCompact` | property, read/write | `Function ComEmitCompact Returns Boolean Procedure Set ComEmitCompact Boolean value` |
| `EmitCrlf` | property, read/write | `Function ComEmitCrlf Returns Boolean Procedure Set ComEmitCrlf Boolean value` |
| `FindStartIndex` | property, read/write | `Function ComFindStartIndex Returns Integer Procedure Set ComFindStartIndex Integer value` |
| `Size` | property, read-only | `Function ComSize Returns Integer` |
| `AddArrayAt` | method | `Function ComAddArrayAt Integer index Returns Boolean` |
| `AddArrayAt2` | method | `Function ComAddArrayAt2 Integer index cComChilkatJsonArray jarr Returns Boolean` |
| `AddBoolAt` | method | `Function ComAddBoolAt Integer index Boolean value Returns Boolean` |
| `AddIntAt` | method | `Function ComAddIntAt Integer index Integer value Returns Boolean` |
| `AddNullAt` | method | `Function ComAddNullAt Integer index Returns Boolean` |
| `AddNumberAt` | method | `Function ComAddNumberAt Integer index String numericStr Returns Boolean` |
| `AddObjectAt` | method | `Function ComAddObjectAt Integer index Returns Boolean` |
| `AddObjectAt2` | method | `Function ComAddObjectAt2 Integer index cComChilkatJsonObject json Returns Boolean` |
| `AddObjectCopyAt` | method | `Function ComAddObjectCopyAt Integer index cComChilkatJsonObject jsonObj Returns Boolean` |
| `AddStringAt` | method | `Function ComAddStringAt Integer index String value Returns Boolean` |
| `AddUIntAt` | method | `Function ComAddUIntAt Integer index Variant value Returns Boolean` |
| `AppendArrayItems` | method | `Function ComAppendArrayItems cComChilkatJsonArray jarr Returns Boolean` |
| `ArrayAt` | method | `Function ComArrayAt Integer index Returns cComChilkatJsonArray` |
| `ArrayAt2` | method | `Function ComArrayAt2 Integer index cComChilkatJsonArray jarr Returns Boolean` |
| `BoolAt` | method | `Function ComBoolAt Integer index Returns Boolean` |
| `Clear` | method | `Procedure ComClear` |
| `DateAt` | method | `Function ComDateAt Integer index cComCkDateTime dt Returns Boolean` |
| `DeleteAt` | method | `Function ComDeleteAt Integer index Returns Boolean` |
| `DtAt` | method | `Function ComDtAt Integer index Boolean bLocal cComDtObj dt Returns Boolean` |
| `Emit` | method | `Function ComEmit Returns String` |
| `EmitSb` | method | `Function ComEmitSb cComChilkatStringBuilder sb Returns Boolean` |
| `FindObject` | method | `Function ComFindObject String name String value Boolean caseSensitive Returns Integer` |
| `FindString` | method | `Function ComFindString String value Boolean caseSensitive Returns Integer` |
| `IntAt` | method | `Function ComIntAt Integer index Returns Integer` |
| `IsNullAt` | method | `Function ComIsNullAt Integer index Returns Boolean` |
| `Load` | method | `Function ComLoad String jsonArray Returns Boolean` |
| `LoadSb` | method | `Function ComLoadSb cComChilkatStringBuilder sb Returns Boolean` |
| `ObjectAt` | method | `Function ComObjectAt Integer index Returns cComChilkatJsonObject` |
| `ObjectAt2` | method | `Function ComObjectAt2 Integer index cComChilkatJsonObject jsonObj Returns Boolean` |
| `SetBoolAt` | method | `Function ComSetBoolAt Integer index Boolean value Returns Boolean` |
| `SetIntAt` | method | `Function ComSetIntAt Integer index Integer value Returns Boolean` |
| `SetNullAt` | method | `Function ComSetNullAt Integer index Returns Boolean` |
| `SetNumberAt` | method | `Function ComSetNumberAt Integer index String value Returns Boolean` |
| `SetStringAt` | method | `Function ComSetStringAt Integer index String value Returns Boolean` |
| `SetUIntAt` | method | `Function ComSetUIntAt Integer index Variant value Returns Boolean` |
| `StringAt` | method | `Function ComStringAt Integer index Returns String` |
| `Swap` | method | `Function ComSwap Integer index1 Integer index2 Returns Boolean` |
| `TypeAt` | method | `Function ComTypeAt Integer index Returns Integer` |
| `UIntAt` | method | `Function ComUIntAt Integer index` |

## Properties

### JsonArray.EmitCompact

`Chilkat 11.7.0 · dataflex · JsonArray · EmitCompact · property · read/write · since 9.5.0.64`

```dataflex
Function ComEmitCompact Returns Boolean
Procedure Set ComEmitCompact Boolean value
```

Controls whether emitted JSON is compact or pretty-formatted. If `True`, output contains no unnecessary whitespace and is emitted on a single line. If `False`, indentation and line breaks are added for readability. The default is `True`.

### JsonArray.EmitCrlf

`Chilkat 11.7.0 · dataflex · JsonArray · EmitCrlf · property · read/write · since 9.5.0.64`

```dataflex
Function ComEmitCrlf Returns Boolean
Procedure Set ComEmitCrlf Boolean value
```

Controls line endings when pretty-formatted JSON is emitted. If `True`, line breaks use CRLF (); if `False`, they use LF (). The default is `True`.

**Applies only to pretty output:** When `EmitCompact` is `True`, the JSON is emitted on one line and this setting has no effect.

### JsonArray.FindStartIndex

`Chilkat 11.7.0 · dataflex · JsonArray · FindStartIndex · property · read/write · since 11.6.0`

```dataflex
Function ComFindStartIndex Returns Integer
Procedure Set ComFindStartIndex Integer value
```

Specifies the zero-based array index at which `FindString` and `FindObject` begin searching. The default value is `0`.

**Iterating matches:** After finding a match at index `n`, set this property to `n + 1` before the next search to continue with later elements.

### JsonArray.Size

`Chilkat 11.7.0 · dataflex · JsonArray · Size · property · read-only · since 9.5.0.56`

```dataflex
Function ComSize Returns Integer
```

Returns the number of values currently contained in the JSON array. Array indexes therefore range from `0` through `Size - 1`.

## Methods

### JsonArray.AddArrayAt

`Chilkat 11.7.0 · dataflex · JsonArray · AddArrayAt · method · since 9.5.0.56`

```dataflex
Function ComAddArrayAt Integer index Returns Boolean
```

Inserts a new, empty JSON array at zero-based position `index`. Existing elements at that position and after it are shifted one position toward the end of the array.

|  |  |
| --- | --- |
| `0` | Insert as the first array element. |
| `-1` | Append as the last array element. |
| `n` | Insert at zero-based position n. |

**Insert vs. replace:** The `Add*At` methods insert a new array element. Use the corresponding `Set*At` method when replacing an existing element.

Returns True for success, False for failure.

### JsonArray.AddArrayAt2

`Chilkat 11.7.0 · dataflex · JsonArray · AddArrayAt2 · method · since 11.1.0`

```dataflex
Function ComAddArrayAt2 Integer index cComChilkatJsonArray jarr Returns Boolean
```

Inserts a new, empty JSON array at zero-based position `index` and updates `jarr` to reference the newly inserted array.

|  |  |
| --- | --- |
| `0` | Insert as the first array element. |
| `-1` | Append as the last array element. |
| `n` | Insert at zero-based position n. |

**Immediate editing:** Because `jarr` references the inserted array, it can be populated directly without a separate `ArrayAt` lookup.

Returns True for success, False for failure.

### JsonArray.AddBoolAt

`Chilkat 11.7.0 · dataflex · JsonArray · AddBoolAt · method · since 9.5.0.56`

```dataflex
Function ComAddBoolAt Integer index Boolean value Returns Boolean
```

Inserts a new JSON boolean value at zero-based position `index`. Existing elements at that position and after it are shifted one position toward the end of the array.

|  |  |
| --- | --- |
| `0` | Insert as the first array element. |
| `-1` | Append as the last array element. |
| `n` | Insert at zero-based position n. |

**Insert vs. replace:** The `Add*At` methods insert a new array element. Use the corresponding `Set*At` method when replacing an existing element.

Returns True for success, False for failure.

### JsonArray.AddIntAt

`Chilkat 11.7.0 · dataflex · JsonArray · AddIntAt · method · since 9.5.0.56`

```dataflex
Function ComAddIntAt Integer index Integer value Returns Boolean
```

Inserts a new JSON integer value at zero-based position `index`. Existing elements at that position and after it are shifted one position toward the end of the array.

|  |  |
| --- | --- |
| `0` | Insert as the first array element. |
| `-1` | Append as the last array element. |
| `n` | Insert at zero-based position n. |

**Insert vs. replace:** The `Add*At` methods insert a new array element. Use the corresponding `Set*At` method when replacing an existing element.

Returns True for success, False for failure.

### JsonArray.AddNullAt

`Chilkat 11.7.0 · dataflex · JsonArray · AddNullAt · method · since 9.5.0.56`

```dataflex
Function ComAddNullAt Integer index Returns Boolean
```

Inserts a JSON `null` value at zero-based position `index`. Existing elements at that position and after it are shifted one position toward the end of the array.

|  |  |
| --- | --- |
| `0` | Insert as the first array element. |
| `-1` | Append as the last array element. |
| `n` | Insert at zero-based position n. |

**Insert vs. replace:** The `Add*At` methods insert a new array element. Use the corresponding `Set*At` method when replacing an existing element.

Returns True for success, False for failure.

### JsonArray.AddNumberAt

`Chilkat 11.7.0 · dataflex · JsonArray · AddNumberAt · method · since 9.5.0.56`

```dataflex
Function ComAddNumberAt Integer index String numericStr Returns Boolean
```

Inserts a JSON number at zero-based position `index`. The `numericStr` argument supplies the exact JSON numeric text to store. Existing elements at that position and after it are shifted one position toward the end of the array.

|  |  |
| --- | --- |
| `0` | Insert as the first array element. |
| `-1` | Append as the last array element. |
| `n` | Insert at zero-based position n. |

**Exact numeric text:** Use this method when lexical form or precision matters, for example `12345678901234567890`, `1.2500`, or scientific notation. The supplied text must be valid JSON number syntax; JSON does not permit `NaN` or infinity.

Returns True for success, False for failure.

### JsonArray.AddObjectAt

`Chilkat 11.7.0 · dataflex · JsonArray · AddObjectAt · method · since 9.5.0.56`

```dataflex
Function ComAddObjectAt Integer index Returns Boolean
```

Inserts a new, empty JSON object at zero-based position `index`. Existing elements at that position and after it are shifted one position toward the end of the array.

|  |  |
| --- | --- |
| `0` | Insert as the first array element. |
| `-1` | Append as the last array element. |
| `n` | Insert at zero-based position n. |

**Insert vs. replace:** The `Add*At` methods insert a new array element. Use the corresponding `Set*At` method when replacing an existing element.

Returns True for success, False for failure.

### JsonArray.AddObjectAt2

`Chilkat 11.7.0 · dataflex · JsonArray · AddObjectAt2 · method · since 11.1.0`

```dataflex
Function ComAddObjectAt2 Integer index cComChilkatJsonObject json Returns Boolean
```

Inserts a new, empty JSON object at zero-based position `index` and updates `json` to reference the newly inserted object.

|  |  |
| --- | --- |
| `0` | Insert as the first array element. |
| `-1` | Append as the last array element. |
| `n` | Insert at zero-based position n. |

**Immediate editing:** Because `json` references the inserted object, it can be populated directly without a separate `ObjectAt` lookup.

Returns True for success, False for failure.

### JsonArray.AddObjectCopyAt

`Chilkat 11.7.0 · dataflex · JsonArray · AddObjectCopyAt · method · since 9.5.0.82`

```dataflex
Function ComAddObjectCopyAt Integer index cComChilkatJsonObject jsonObj Returns Boolean
```

Inserts an independent copy of `jsonObj` at zero-based position `index`. Existing elements at that position and after it are shifted one position toward the end of the array.

|  |  |
| --- | --- |
| `0` | Insert as the first array element. |
| `-1` | Append as the last array element. |
| `n` | Insert at zero-based position n. |

**Copy semantics:** The inserted object is copied rather than referenced. Later changes to the source `jsonObj` do not serve as edits to the inserted array value.

Returns True for success, False for failure.

### JsonArray.AddStringAt

`Chilkat 11.7.0 · dataflex · JsonArray · AddStringAt · method · since 9.5.0.56`

```dataflex
Function ComAddStringAt Integer index String value Returns Boolean
```

Inserts a new JSON string value at zero-based position `index`. Existing elements at that position and after it are shifted one position toward the end of the array.

|  |  |
| --- | --- |
| `0` | Insert as the first array element. |
| `-1` | Append as the last array element. |
| `n` | Insert at zero-based position n. |

**Insert vs. replace:** The `Add*At` methods insert a new array element. Use the corresponding `Set*At` method when replacing an existing element.

Returns True for success, False for failure.

### JsonArray.AddUIntAt

`Chilkat 11.7.0 · dataflex · JsonArray · AddUIntAt · method · since 9.5.0.96`

```dataflex
Function ComAddUIntAt Integer index Variant value Returns Boolean
```

Inserts a new JSON unsigned integer value at zero-based position `index`. Existing elements at that position and after it are shifted one position toward the end of the array.

|  |  |
| --- | --- |
| `0` | Insert as the first array element. |
| `-1` | Append as the last array element. |
| `n` | Insert at zero-based position n. |

**Insert vs. replace:** The `Add*At` methods insert a new array element. Use the corresponding `Set*At` method when replacing an existing element.

Returns True for success, False for failure.

### JsonArray.AppendArrayItems

`Chilkat 11.7.0 · dataflex · JsonArray · AppendArrayItems · method · since 9.5.0.82`

```dataflex
Function ComAppendArrayItems cComChilkatJsonArray jarr Returns Boolean
```

Appends copies of all values from `jarr` to the end of this array, preserving their order.

**Source is unchanged:** The source array is not emptied or moved. This method is useful for concatenating JSON arrays, including arrays belonging to different JSON documents.

Returns True for success, False for failure.

### JsonArray.ArrayAt

`Chilkat 11.7.0 · dataflex · JsonArray · ArrayAt · method · since 9.5.0.56`

```dataflex
Function ComArrayAt Integer index Returns cComChilkatJsonArray
```

Returns the nested JSON array stored at zero-based position `index`.

**Reference, not copy:** The returned `JsonArray` refers to the existing nested array in the same JSON document. Changes made through the returned object modify that nested array.

**Type requirement:** The value at `index` must be an array. Use `TypeAt` when the value type is not already known.

Returns `null` on failure

### JsonArray.ArrayAt2

`Chilkat 11.7.0 · dataflex · JsonArray · ArrayAt2 · method · since 11.0.0`

```dataflex
Function ComArrayAt2 Integer index cComChilkatJsonArray jarr Returns Boolean
```

Updates `jarr` so that it references the nested JSON array stored at zero-based position `index`.

**Reference, not copy:** Changes made through `jarr` modify the existing nested array in the same JSON document.

Returns True for success, False for failure.

### JsonArray.BoolAt

`Chilkat 11.7.0 · dataflex · JsonArray · BoolAt · method · since 9.5.0.56`

```dataflex
Function ComBoolAt Integer index Returns Boolean
```

Returns the boolean value stored at zero-based position `index`.

**Type-aware access:** Use `TypeAt` when the JSON type at `index` is not already known.

### JsonArray.Clear

`Chilkat 11.7.0 · dataflex · JsonArray · Clear · method · since 9.5.0.76`

```dataflex
Procedure ComClear
```

Removes all values from the array, leaving an empty JSON array (`[]`).

### JsonArray.DateAt

`Chilkat 11.7.0 · dataflex · JsonArray · DateAt · method · since 9.5.0.73`

```dataflex
Function ComDateAt Integer index cComCkDateTime dt Returns Boolean
```

Parses the date/time value at zero-based position `index` and loads the result into `dt`. Recognized forms include ISO 8601 timestamps (for example, `2009-11-04T19:55:41Z`), RFC 822-style date/time strings, and Unix timestamp integers.

**JSON has no native date type:** Dates are application conventions represented as strings or numbers. These methods recognize common representations and convert them to Chilkat date/time objects.

Returns True for success, False for failure.

### JsonArray.DeleteAt

`Chilkat 11.7.0 · dataflex · JsonArray · DeleteAt · method · since 9.5.0.56`

```dataflex
Function ComDeleteAt Integer index Returns Boolean
```

Deletes the value at zero-based position `index`. Elements following the deleted value shift down by one position.

Returns True for success, False for failure.

### JsonArray.DtAt

`Chilkat 11.7.0 · dataflex · JsonArray · DtAt · method · since 9.5.0.73`

```dataflex
Function ComDtAt Integer index Boolean bLocal cComDtObj dt Returns Boolean
```

Parses the date/time value at zero-based position `index` and loads the result into `dt`. If `bLocal` is `True`, the populated fields represent local time; if `False`, they represent UTC/GMT. Recognized forms include ISO 8601 timestamps, RFC 822-style date/time strings, and Unix timestamp integers.

**JSON has no native date type:** Dates are application conventions represented as strings or numbers. These methods recognize common representations and convert them to Chilkat date/time objects.

Returns True for success, False for failure.

### JsonArray.Emit

`Chilkat 11.7.0 · dataflex · JsonArray · Emit · method · since 9.5.0.58`

```dataflex
Function ComEmit Returns String
```

Serializes this JSON array and returns the resulting JSON text.

**Formatting:** Set `EmitCompact` to choose compact versus pretty output. When pretty output is enabled, `EmitCrlf` selects CRLF or LF line endings.

Returns `null` on failure

### JsonArray.EmitSb

`Chilkat 11.7.0 · dataflex · JsonArray · EmitSb · method · since 9.5.0.65`

```dataflex
Function ComEmitSb cComChilkatStringBuilder sb Returns Boolean
```

Serializes this JSON array into the supplied `StringBuilder`.

**Formatting:** Set `EmitCompact` to choose compact versus pretty output. When pretty output is enabled, `EmitCrlf` selects CRLF or LF line endings.

**Large JSON:** Using a `StringBuilder` can avoid returning a very large JSON document as a language-native string before passing it to another Chilkat method or writing it to a file.

Returns True for success, False for failure.

### JsonArray.FindObject

`Chilkat 11.7.0 · dataflex · JsonArray · FindObject · method · since 9.5.0.73`

```dataflex
Function ComFindObject String name String value Boolean caseSensitive Returns Integer
```

Searches array elements that are JSON objects and returns the zero-based index of the first object whose direct member `name` has a value matching `value`. Returns `-1` if no match is found. The value pattern may contain `*`, which matches zero or more characters. Set `caseSensitive` to control whether letter case must match.

**Member name, not JSON path:** `name` identifies a direct member of each object being tested; it is not a JSON path.

**Search start:** Searching begins at `FindStartIndex`, whose default is `0`. To continue searching after a match, set `FindStartIndex` to the previous returned index plus 1.

### JsonArray.FindString

`Chilkat 11.7.0 · dataflex · JsonArray · FindString · method · since 9.5.0.73`

```dataflex
Function ComFindString String value Boolean caseSensitive Returns Integer
```

Searches for the first string array element matching `value` and returns its zero-based index, or `-1` if no match is found. The pattern may contain `*`, which matches zero or more characters. Set `caseSensitive` to control whether letter case must match.

**Search start:** Searching begins at `FindStartIndex`, whose default is `0`. To continue searching after a match, set `FindStartIndex` to the previous returned index plus 1.

### JsonArray.IntAt

`Chilkat 11.7.0 · dataflex · JsonArray · IntAt · method · since 9.5.0.56`

```dataflex
Function ComIntAt Integer index Returns Integer
```

Returns the integer value stored at zero-based position `index`.

**Type-aware access:** Use `TypeAt` when the JSON type at `index` is not already known.

### JsonArray.IsNullAt

`Chilkat 11.7.0 · dataflex · JsonArray · IsNullAt · method · since 9.5.0.56`

```dataflex
Function ComIsNullAt Integer index Returns Boolean
```

Returns `True` if the value at zero-based position `index` is the JSON value `null`; otherwise returns `False`.

**JSON null:** `null` is a distinct JSON value. It is not the same as an empty string, zero, `false`, an empty object, or an empty array.

### JsonArray.Load

`Chilkat 11.7.0 · dataflex · JsonArray · Load · method · since 9.5.0.64`

```dataflex
Function ComLoad String jsonArray Returns Boolean
```

Parses the JSON array text in `jsonArray` and loads it into this object. The input must represent a JSON array, beginning with `[` and ending with `]`.

**Important — loading detaches the array:** Calling this method makes the `JsonArray` its own independent JSON document. If the object previously referenced an array nested inside another JSON document, that relationship is discarded. For this reason, call `Load`/`LoadSb` on a new `JsonArray` instance.

Returns True for success, False for failure.

### JsonArray.LoadSb

`Chilkat 11.7.0 · dataflex · JsonArray · LoadSb · method · since 9.5.0.64`

```dataflex
Function ComLoadSb cComChilkatStringBuilder sb Returns Boolean
```

Parses the JSON array contained in `sb` and loads it into this object. The input must represent a JSON array, beginning with `[` and ending with `]`.

**Important — loading detaches the array:** Calling this method makes the `JsonArray` its own independent JSON document. If the object previously referenced an array nested inside another JSON document, that relationship is discarded. For this reason, call `Load`/`LoadSb` on a new `JsonArray` instance.

Returns True for success, False for failure.

### JsonArray.ObjectAt

`Chilkat 11.7.0 · dataflex · JsonArray · ObjectAt · method · since 9.5.0.56`

```dataflex
Function ComObjectAt Integer index Returns cComChilkatJsonObject
```

Returns the JSON object stored at zero-based position `index`.

**Reference, not copy:** The returned `JsonObject` refers to the existing object in the same JSON document. Changes made through the returned object modify that nested object.

**Type requirement:** The value at `index` must be an object. Use `TypeAt` when the value type is not already known.

Returns `null` on failure

### JsonArray.ObjectAt2

`Chilkat 11.7.0 · dataflex · JsonArray · ObjectAt2 · method · since 11.0.0`

```dataflex
Function ComObjectAt2 Integer index cComChilkatJsonObject jsonObj Returns Boolean
```

Updates `jsonObj` so that it references the JSON object stored at zero-based position `index`.

**Reference, not copy:** Changes made through `jsonObj` modify the existing object in the same JSON document.

Returns True for success, False for failure.

### JsonArray.SetBoolAt

`Chilkat 11.7.0 · dataflex · JsonArray · SetBoolAt · method · since 9.5.0.56`

```dataflex
Function ComSetBoolAt Integer index Boolean value Returns Boolean
```

Replaces the value at zero-based position `index` with the specified JSON boolean value. The array length and the positions of other elements are unchanged.

Returns True for success, False for failure.

### JsonArray.SetIntAt

`Chilkat 11.7.0 · dataflex · JsonArray · SetIntAt · method · since 9.5.0.56`

```dataflex
Function ComSetIntAt Integer index Integer value Returns Boolean
```

Replaces the value at zero-based position `index` with the specified JSON integer value. The array length and the positions of other elements are unchanged.

Returns True for success, False for failure.

### JsonArray.SetNullAt

`Chilkat 11.7.0 · dataflex · JsonArray · SetNullAt · method · since 9.5.0.56`

```dataflex
Function ComSetNullAt Integer index Returns Boolean
```

Replaces the value at zero-based position `index` with the JSON value `null`. The array length and the positions of other elements are unchanged.

Returns True for success, False for failure.

### JsonArray.SetNumberAt

`Chilkat 11.7.0 · dataflex · JsonArray · SetNumberAt · method · since 9.5.0.56`

```dataflex
Function ComSetNumberAt Integer index String value Returns Boolean
```

Replaces the value at zero-based position `index` with a JSON number. The `value` argument supplies the exact JSON numeric text to store.

**Exact numeric text:** Use this method when lexical form or precision matters. The supplied text must be valid JSON number syntax; JSON does not permit `NaN` or infinity.

Returns True for success, False for failure.

### JsonArray.SetStringAt

`Chilkat 11.7.0 · dataflex · JsonArray · SetStringAt · method · since 9.5.0.56`

```dataflex
Function ComSetStringAt Integer index String value Returns Boolean
```

Replaces the value at zero-based position `index` with the specified JSON string value. The array length and the positions of other elements are unchanged.

Returns True for success, False for failure.

### JsonArray.SetUIntAt

`Chilkat 11.7.0 · dataflex · JsonArray · SetUIntAt · method · since 9.5.0.96`

```dataflex
Function ComSetUIntAt Integer index Variant value Returns Boolean
```

Replaces the value at zero-based position `index` with the specified JSON unsigned integer value. The array length and the positions of other elements are unchanged.

Returns True for success, False for failure.

### JsonArray.StringAt

`Chilkat 11.7.0 · dataflex · JsonArray · StringAt · method · since 9.5.0.56`

```dataflex
Function ComStringAt Integer index Returns String
```

Returns the string value stored at zero-based position `index`.

**Type-aware access:** Use `TypeAt` when the JSON type at `index` is not already known.

Returns `null` on failure

### JsonArray.Swap

`Chilkat 11.7.0 · dataflex · JsonArray · Swap · method · since 9.5.0.76`

```dataflex
Function ComSwap Integer index1 Integer index2 Returns Boolean
```

Exchanges the values at zero-based positions `index1` and `index2`. The array length does not change.

Returns True for success, False for failure.

### JsonArray.TypeAt

`Chilkat 11.7.0 · dataflex · JsonArray · TypeAt · method · since 9.5.0.58`

```dataflex
Function ComTypeAt Integer index Returns Integer
```

Returns an integer identifying the JSON type of the value at zero-based position `index`. Returns `-1` if no value exists at that index.

|  |  |
| --- | --- |
| `1` | string |
| `2` | number |
| `3` | object |
| `4` | array |
| `5` | boolean |
| `6` | null |

**Why use TypeAt:** JSON arrays may contain mixed types. Checking the type first avoids choosing a type-specific accessor such as `ObjectAt`, `ArrayAt`, or `IntAt` for the wrong kind of value.

### JsonArray.UIntAt

`Chilkat 11.7.0 · dataflex · JsonArray · UIntAt · method · since 9.5.0.96`

```dataflex
Function ComUIntAt Integer index
```

Returns the unsigned integer value stored at zero-based position `index`.

**Type-aware access:** Use `TypeAt` when the JSON type at `index` is not already known.

## Related classes

[`CkDateTime`](https://www.chilkatsoft.com/ai-docs/v/11.7.0/dataflex/classes/CkDateTime.md), [`DtObj`](https://www.chilkatsoft.com/ai-docs/v/11.7.0/dataflex/classes/DtObj.md), [`JsonObject`](https://www.chilkatsoft.com/ai-docs/v/11.7.0/dataflex/classes/JsonObject.md), [`StringBuilder`](https://www.chilkatsoft.com/ai-docs/v/11.7.0/dataflex/classes/StringBuilder.md)