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

> Chilkat 11.7.0 · language=python · 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/python/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**

```python
obj = chilkat2.JsonArray()
```

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 Python.

Minimal complete program:

```python
import chilkat2

# Required once per process. Any string unlocks a 30-day trial; use your purchased code in production.
glob = chilkat2.Global()
if not glob.UnlockBundle("Anything for 30-day trial"):
    print(glob.LastErrorText)
    raise SystemExit(1)

jsonArray = chilkat2.JsonArray()

success = jsonArray.Load("<jsonArray>")
if not success:
    print(jsonArray.LastErrorText)   # full diagnostic of what went wrong
    raise SystemExit(1)
```

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` | `string DebugLogFilePath` | read/write | If set to a file path, this property logs the LastErrorText of each Chilkat method or property call to the specified file. |
| `LastErrorHtml` | `string LastErrorHtml (read-only)` | read-only | Provides HTML-formatted information about the last called method or property. |
| `LastErrorText` | `string LastErrorText (read-only)` | read-only | Provides plain text information about the last called method or property. |
| `LastErrorXml` | `string LastErrorXml (read-only)` | read-only | Provides XML-formatted information about the last called method or property. |
| `LastMethodSuccess` | `bool LastMethodSuccess` | read/write | Indicates the success or failure of the most recent method call: `True` means success, `False` means failure. |
| `VerboseLogging` | `bool VerboseLogging` | read/write | If set to `True`, then the contents of LastErrorText (or LastErrorXml, or LastErrorHtml) may contain more verbose information. |
| `Version` | `string Version (read-only)` | read-only | Version of the component/library, such as "10.1.0" |

## Member index

| Member | Kind | Signature |
|---|---|---|
| `EmitCompact` | property, read/write | `bool EmitCompact` |
| `EmitCrlf` | property, read/write | `bool EmitCrlf` |
| `FindStartIndex` | property, read/write | `int FindStartIndex` |
| `Size` | property, read-only | `int Size (read-only)` |
| `AddArrayAt` | method | `bool AddArrayAt(int index)` |
| `AddArrayAt2` | method | `bool AddArrayAt2(int index, JsonArray jarr)` |
| `AddBoolAt` | method | `bool AddBoolAt(int index, bool value)` |
| `AddIntAt` | method | `bool AddIntAt(int index, int value)` |
| `AddNullAt` | method | `bool AddNullAt(int index)` |
| `AddNumberAt` | method | `bool AddNumberAt(int index, string numericStr)` |
| `AddObjectAt` | method | `bool AddObjectAt(int index)` |
| `AddObjectAt2` | method | `bool AddObjectAt2(int index, JsonObject json)` |
| `AddObjectCopyAt` | method | `bool AddObjectCopyAt(int index, JsonObject jsonObj)` |
| `AddStringAt` | method | `bool AddStringAt(int index, string value)` |
| `AddUIntAt` | method | `bool AddUIntAt(int index, int value)` |
| `AppendArrayItems` | method | `bool AppendArrayItems(JsonArray jarr)` |
| `ArrayAt` | method | `JsonArray ArrayAt(int index)` |
| `ArrayAt2` | method | `bool ArrayAt2(int index, JsonArray jarr)` |
| `BoolAt` | method | `bool BoolAt(int index)` |
| `Clear` | method | `void Clear()` |
| `DateAt` | method | `bool DateAt(int index, CkDateTime dt)` |
| `DeleteAt` | method | `bool DeleteAt(int index)` |
| `DtAt` | method | `bool DtAt(int index, bool bLocal, DtObj dt)` |
| `Emit` | method | `string Emit()` |
| `EmitSb` | method | `bool EmitSb(StringBuilder sb)` |
| `FindObject` | method | `int FindObject(string name, string value, bool caseSensitive)` |
| `FindString` | method | `int FindString(string value, bool caseSensitive)` |
| `IntAt` | method | `int IntAt(int index)` |
| `IsNullAt` | method | `bool IsNullAt(int index)` |
| `Load` | method | `bool Load(string jsonArray)` |
| `LoadSb` | method | `bool LoadSb(StringBuilder sb)` |
| `ObjectAt` | method | `JsonObject ObjectAt(int index)` |
| `ObjectAt2` | method | `bool ObjectAt2(int index, JsonObject jsonObj)` |
| `SetBoolAt` | method | `bool SetBoolAt(int index, bool value)` |
| `SetIntAt` | method | `bool SetIntAt(int index, int value)` |
| `SetNullAt` | method | `bool SetNullAt(int index)` |
| `SetNumberAt` | method | `bool SetNumberAt(int index, string value)` |
| `SetStringAt` | method | `bool SetStringAt(int index, string value)` |
| `SetUIntAt` | method | `bool SetUIntAt(int index, int value)` |
| `StringAt` | method | `string StringAt(int index)` |
| `Swap` | method | `bool Swap(int index1, int index2)` |
| `TypeAt` | method | `int TypeAt(int index)` |
| `UIntAt` | method | `int UIntAt(int index)` |

## Properties

### JsonArray.EmitCompact

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

```python
bool EmitCompact
```

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 · python · JsonArray · EmitCrlf · property · read/write · since 9.5.0.64`

```python
bool EmitCrlf
```

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 · python · JsonArray · FindStartIndex · property · read/write · since 11.6.0`

```python
int FindStartIndex
```

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 · python · JsonArray · Size · property · read-only · since 9.5.0.56`

```python
int Size (read-only)
```

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 · python · JsonArray · AddArrayAt · method · since 9.5.0.56`

```python
bool AddArrayAt(int index)
```

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 · python · JsonArray · AddArrayAt2 · method · since 11.1.0`

```python
bool AddArrayAt2(int index, JsonArray jarr)
```

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 · python · JsonArray · AddBoolAt · method · since 9.5.0.56`

```python
bool AddBoolAt(int index, bool value)
```

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 · python · JsonArray · AddIntAt · method · since 9.5.0.56`

```python
bool AddIntAt(int index, int value)
```

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 · python · JsonArray · AddNullAt · method · since 9.5.0.56`

```python
bool AddNullAt(int index)
```

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 · python · JsonArray · AddNumberAt · method · since 9.5.0.56`

```python
bool AddNumberAt(int index, string numericStr)
```

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 · python · JsonArray · AddObjectAt · method · since 9.5.0.56`

```python
bool AddObjectAt(int index)
```

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 · python · JsonArray · AddObjectAt2 · method · since 11.1.0`

```python
bool AddObjectAt2(int index, JsonObject json)
```

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 · python · JsonArray · AddObjectCopyAt · method · since 9.5.0.82`

```python
bool AddObjectCopyAt(int index, JsonObject jsonObj)
```

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 · python · JsonArray · AddStringAt · method · since 9.5.0.56`

```python
bool AddStringAt(int index, string value)
```

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 · python · JsonArray · AddUIntAt · method · since 9.5.0.96`

```python
bool AddUIntAt(int index, int value)
```

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 · python · JsonArray · AppendArrayItems · method · since 9.5.0.82`

```python
bool AppendArrayItems(JsonArray jarr)
```

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 · python · JsonArray · ArrayAt · method · since 9.5.0.56`

```python
JsonArray ArrayAt(int index)
```

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 `None` on failure

### JsonArray.ArrayAt2

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

```python
bool ArrayAt2(int index, JsonArray jarr)
```

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 · python · JsonArray · BoolAt · method · since 9.5.0.56`

```python
bool BoolAt(int index)
```

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 · python · JsonArray · Clear · method · since 9.5.0.76`

```python
void Clear()
```

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

### JsonArray.DateAt

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

```python
bool DateAt(int index, CkDateTime dt)
```

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 · python · JsonArray · DeleteAt · method · since 9.5.0.56`

```python
bool DeleteAt(int index)
```

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 · python · JsonArray · DtAt · method · since 9.5.0.73`

```python
bool DtAt(int index, bool bLocal, DtObj dt)
```

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 · python · JsonArray · Emit · method · since 9.5.0.58`

```python
string Emit()
```

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 an empty string on failure. Check the `LastMethodSuccess` property to determine success or failure.

### JsonArray.EmitSb

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

```python
bool EmitSb(StringBuilder sb)
```

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 · python · JsonArray · FindObject · method · since 9.5.0.73`

```python
int FindObject(string name, string value, bool caseSensitive)
```

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 · python · JsonArray · FindString · method · since 9.5.0.73`

```python
int FindString(string value, bool caseSensitive)
```

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 · python · JsonArray · IntAt · method · since 9.5.0.56`

```python
int IntAt(int index)
```

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 · python · JsonArray · IsNullAt · method · since 9.5.0.56`

```python
bool IsNullAt(int index)
```

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 · python · JsonArray · Load · method · since 9.5.0.64`

```python
bool Load(string jsonArray)
```

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 · python · JsonArray · LoadSb · method · since 9.5.0.64`

```python
bool LoadSb(StringBuilder sb)
```

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 · python · JsonArray · ObjectAt · method · since 9.5.0.56`

```python
JsonObject ObjectAt(int index)
```

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 `None` on failure

### JsonArray.ObjectAt2

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

```python
bool ObjectAt2(int index, JsonObject jsonObj)
```

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 · python · JsonArray · SetBoolAt · method · since 9.5.0.56`

```python
bool SetBoolAt(int index, bool value)
```

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 · python · JsonArray · SetIntAt · method · since 9.5.0.56`

```python
bool SetIntAt(int index, int value)
```

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 · python · JsonArray · SetNullAt · method · since 9.5.0.56`

```python
bool SetNullAt(int index)
```

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 · python · JsonArray · SetNumberAt · method · since 9.5.0.56`

```python
bool SetNumberAt(int index, string value)
```

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 · python · JsonArray · SetStringAt · method · since 9.5.0.56`

```python
bool SetStringAt(int index, string value)
```

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 · python · JsonArray · SetUIntAt · method · since 9.5.0.96`

```python
bool SetUIntAt(int index, int value)
```

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 · python · JsonArray · StringAt · method · since 9.5.0.56`

```python
string StringAt(int index)
```

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 an empty string on failure. Check the `LastMethodSuccess` property to determine success or failure.

### JsonArray.Swap

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

```python
bool Swap(int index1, int index2)
```

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 · python · JsonArray · TypeAt · method · since 9.5.0.58`

```python
int TypeAt(int index)
```

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 · python · JsonArray · UIntAt · method · since 9.5.0.96`

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