StringBuilder Node.js Reference Documentation

StringBuilder

Current Version: 9.5.0.97

A simple class for building strings. (Represents a mutable string of characters.)

Note: This class was introduced in Chilkat v9.5.0.58.

Object Creation

var obj = new chilkat.StringBuilder();

Properties

IntValue
IntValue
· integer
Introduced in version 9.5.0.58

Returns the content of the string converted to an integer.

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IsBase64
IsBase64
· boolean, read-only
Introduced in version 9.5.0.76

Returns true if the content contains only those characters allowed in the base64 encoding. A base64 string is composed of characters 'A'..'Z', 'a'..'z', '0'..'9', '+', '/' and it is often padded at the end with up to two '=', to make the length a multiple of 4. Whitespace is ignored.

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LastMethodSuccess
LastMethodSuccess
· boolean

Indicate whether the last method call succeeded or failed. A value of true indicates success, a value of false indicates failure. This property is automatically set for method calls. It is not modified by property accesses. The property is automatically set to indicate success for the following types of method calls:

  • Any method that returns a string.
  • Any method returning a Chilkat object, binary bytes, or a date/time.
  • Any method returning a standard boolean status value where success = true and failure = false.
  • Any method returning an integer where failure is defined by a return value less than zero.

Note: Methods that do not fit the above requirements will always set this property equal to true. For example, a method that returns no value (such as a "void" in C++) will technically always succeed.

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Length
Length
· integer, read-only
Introduced in version 9.5.0.58

The number of characters of the string contained within this instance.

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Methods

Append
var status = Append(value);
· Returns Boolean (true for success, false for failure).
· value String
Introduced in version 9.5.0.58

Appends a copy of the specified string to this instance.

Returns true for success, false for failure.

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AppendBd
var status = AppendBd(binData, charset, offset, numBytes);
· Returns Boolean (true for success, false for failure).
· binData BinData
· charset String
· offset Number
· numBytes Number
Introduced in version 9.5.0.64

Appends the contents of binData. The charset specifies the character encoding of the bytes contained in binData. The charset can be any of the supported encodings listed at Chilkat Supported Character Encodings. To append the entire contents of binData, set offset and numBytes equal to zero. To append a range of binData, set the offset and numBytes to specify the range.

Returns true for success, false for failure.

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AppendEncoded
var status = AppendEncoded(binaryData, encoding);
· Returns Boolean (true for success, false for failure).
· binaryData Buffer
· encoding String
Introduced in version 9.5.0.58

Appends binary data using the encoding specified by encoding, such as "base64", "hex", etc.

Returns true for success, false for failure.

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AppendInt
var status = AppendInt(value);
· Returns Boolean (true for success, false for failure).
· value Number
Introduced in version 9.5.0.58

Appends the string representation of a specified 32-bit signed integer to this instance.

Returns true for success, false for failure.

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AppendInt64
var status = AppendInt64(value);
· Returns Boolean (true for success, false for failure).
· value Number
Introduced in version 9.5.0.58

Appends the string representation of a specified 64-bit signed integer to this instance.

Returns true for success, false for failure.

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AppendLine
var status = AppendLine(value, crlf);
· Returns Boolean (true for success, false for failure).
· value String
· crlf Boolean
Introduced in version 9.5.0.65

Appends the value followed by a CRLF or LF to the end of the curent StringBuilder object. If crlf is true, then a CRLF line ending is used. Otherwise a LF line ending is used.

Returns true for success, false for failure.

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AppendRandom
var status = AppendRandom(numBytes, encoding);
· Returns Boolean (true for success, false for failure).
· numBytes Number
· encoding String
Introduced in version 9.5.0.96

Append numBytes random bytes encoded according to encoding. encoding can be "hex", "hex_lower", "base64", "base64url", or any other encoding supported by Chilkat.

Returns true for success, false for failure.

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AppendSb
var status = AppendSb(sb);
· Returns Boolean (true for success, false for failure).
· sb StringBuilder
Introduced in version 9.5.0.62

Appends the contents of another StringBuilder to this instance.

Returns true for success, false for failure.

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AppendUuid
var status = AppendUuid(lowerCase);
· Returns Boolean (true for success, false for failure).
· lowerCase Boolean
Introduced in version 9.5.0.93

Generates and appends a random GUID/UUID such as 63c35f38-2b5f-4600-b3da-3ddee86d62b3. If lowerCase is true, then the hex values use lowercase ("a" - "f"). If lowerCase is false then uppercase is used ("A" - "F").

Returns true for success, false for failure.

More Information and Examples
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Clear
Clear();
· Does not return anything (returns Undefined).
Introduced in version 9.5.0.58

Removes all characters from the current StringBuilder instance.

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Contains
var retBool = Contains(str, caseSensitive);
· Returns a Boolean.
· str String
· caseSensitive Boolean
Introduced in version 9.5.0.58

Returns true if the str is contained within this object. For case sensitive matching, set caseSensitive equal to true. For case-insensitive, set caseSensitive equal to false.

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ContainsWord
var retBool = ContainsWord(word, caseSensitive);
· Returns a Boolean.
· word String
· caseSensitive Boolean
Introduced in version 9.5.0.69

Returns true if the word is contained within this object, but only if it is a whole word. This method is limited to finding whole words in strings that only contains characters in the Latin1 charset (i.e. iso-8859-1 or Windows-1252). A whole word can only contain alphanumeric chars where the alpha chars are restricted to those of the Latin1 alpha chars. (The underscore character is also considered part of a word.)

For case sensitive matching, set caseSensitive equal to true. For case-insensitive, set caseSensitive equal to false.

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ContentsEqual
var retBool = ContentsEqual(str, caseSensitive);
· Returns a Boolean.
· str String
· caseSensitive Boolean
Introduced in version 9.5.0.62

Returns true if the contents of this object equals the str. Returns false if unequal. For case insensitive equality, set caseSensitive equal to false.

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ContentsEqualSb
var retBool = ContentsEqualSb(sb, caseSensitive);
· Returns a Boolean.
· sb StringBuilder
· caseSensitive Boolean
Introduced in version 9.5.0.62

Returns true if the contents of this object equals the sb. Returns false if unequal. For case insensitive equality, set caseSensitive equal to false.

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Decode
var status = Decode(encoding, charset);
· Returns Boolean (true for success, false for failure).
· encoding String
· charset String
Introduced in version 9.5.0.62

Decodes and replaces the contents with the decoded string. The encoding can be set to any of the following strings: "base64", "hex", "quoted-printable" (or "qp"), "url", "base32", "Q", "B", "url_rc1738", "url_rfc2396", "url_rfc3986", "url_oauth", "uu", "modBase64", or "html" (for HTML entity encoding). The full up-to-date list of supported binary encodings is available at the link entitled "Supported Binary Encodings" below.

Note: This method can only be called if the encoded content decodes to a string. The charset indicates the charset to be used in intepreting the decoded bytes. For example, the charset can be "utf-8", "utf-16", "iso-8859-1", "shift_JIS", etc.

Returns true for success, false for failure.

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DecodeAndAppend
var status = DecodeAndAppend(value, encoding, charset);
· Returns Boolean (true for success, false for failure).
· value String
· encoding String
· charset String
Introduced in version 9.5.0.87

Decodes a binary encoded string, where the binary encoding (such as "url", "hex", "base64", etc.) is specified by encoding, and the underlying charset encoding (such as "utf-8", "windows-1252", etc.) is specified by charset. The decoded string is appended to this object.

Returns true for success, false for failure.

More Information and Examples
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Encode
var status = Encode(encoding, charset);
· Returns Boolean (true for success, false for failure).
· encoding String
· charset String
Introduced in version 9.5.0.62

Encodes to base64, hex, quoted-printable, URL encoding, etc. The encoding can be set to any of the following strings: "base64", "hex", "quoted-printable" (or "qp"), "url", "base32", "Q", "B", "url_rc1738", "url_rfc2396", "url_rfc3986", "url_oauth", "uu", "modBase64", or "html" (for HTML entity encoding). The full up-to-date list of supported binary encodings is available at the link entitled "Supported Binary Encodings" below.

Returns true for success, false for failure.

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EndsWith
var retBool = EndsWith(substr, caseSensitive);
· Returns a Boolean.
· substr String
· caseSensitive Boolean
Introduced in version 9.5.0.62

Returns true if the string ends with substr. Otherwise returns false. The comparison is case sensitive if caseSensitive is true, and case insensitive if caseSensitive is false.

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EntityDecode
var status = EntityDecode();
· Returns Boolean (true for success, false for failure).
Introduced in version 9.5.0.62

Decodes HTML entities. See HTML entities for more information about HTML entities.

Returns true for success, false for failure.

More Information and Examples
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GetAfterBetween
var retStr = GetAfterBetween(searchAfter, beginMark, endMark);
· Returns a String.
· searchAfter String
· beginMark String
· endMark String
Introduced in version 9.5.0.62

Begin searching after the 1st occurrence of searchAfter is found, and then return the substring found between the next occurrence of beginMark and the next occurrence of endMark.

Returns null on failure

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GetAfterFinal
var retStr = GetAfterFinal(marker, removeFlag);
· Returns a String.
· marker String
· removeFlag Boolean
Introduced in version 9.5.0.77

Returns the substring found after the final occurrence of marker. If removeFlag is true, the marker and the content that follows is removed from this content.

If the marker is not present, then the entire string is returned. In this case, if removeFlag is true, this object is also cleared.

Returns null on failure

More Information and Examples
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GetAsString
var retStr = GetAsString();
· Returns a String.
Introduced in version 9.5.0.58

Returns the contents as a string.

Returns null on failure

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GetBefore
var retStr = GetBefore(marker, removeFlag);
· Returns a String.
· marker String
· removeFlag Boolean
Introduced in version 9.5.0.77

Returns the substring found before the 1st occurrence of marker. If removeFlag is true, the content up to and including the marker is removed from this object's contents.

If the marker is not present, then the entire string is returned. In this case, if removeFlag is true, this object is also cleared.

Returns null on failure

More Information and Examples
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GetBetween
var retStr = GetBetween(beginMark, endMark);
· Returns a String.
· beginMark String
· endMark String
Introduced in version 9.5.0.62

Returns the substring found between the 1st occurrence of beginMark and the next occurrence of endMark.

Returns null on failure

More Information and Examples
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GetDecoded
var retBuf = GetDecoded(encoding);
· Returns a Buffer.
Introduced in version 9.5.0.62

Decodes and returns the decoded bytes. The encoding can be set to any of the following strings: "base64", "hex", "quoted-printable" (or "qp"), "url", "base32", "Q", "B", "url_rc1738", "url_rfc2396", "url_rfc3986", "url_oauth", "uu", "modBase64", or "html" (for HTML entity encoding). The full up-to-date list of supported binary encodings is available at the link entitled "Supported Binary Encodings" below.

Returns null on failure

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GetEncoded
var retStr = GetEncoded(encoding, charset);
· Returns a String.
· encoding String
· charset String
Introduced in version 9.5.0.62

Returns the string contents encoded in an encoding such as base64, hex, quoted-printable, or URL-encoding. The encoding can be set to any of the following strings: "base64", "hex", "quoted-printable" (or "qp"), "url", "base32", "Q", "B", "url_rc1738", "url_rfc2396", "url_rfc3986", "url_oauth", "uu", "modBase64", or "html" (for HTML entity encoding). The full up-to-date list of supported binary encodings is available at the link entitled "Supported Binary Encodings" below.

Note: The Encode method modifies the content of this object. The GetEncoded method leaves this object's content unmodified.

Returns null on failure

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GetHash
var retStr = GetHash(algorithm, encoding, charset);
· Returns a String.
· algorithm String
· encoding String
· charset String
Introduced in version 9.5.0.91

Returns the hash of the contents of this object. The algorithm is the hash algorithm, and can be "sha1", "sha256", "sha384", "sha512", "sha3-224", "sha3-256", "sha3-384", "sha3-512", "md2", "md5", "ripemd128", "ripemd160","ripemd256", or "ripemd320". The encoding can be "base64", "modBase64", "base64Url", "base32", "base58", "qp" (for quoted-printable), "url" (for url-encoding), "hex", "hexLower", or any of the encodings found at Chilkat Binary Encodings List.

The charset is the character encoding byte representation to hash. It is typically "utf-8". It can be any of the chacter encodings listed at Chilkat Character Encodings List.

Returns null on failure

More Information and Examples
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GetNth
var retStr = GetNth(index, delimiterChar, exceptDoubleQuoted, exceptEscaped);
· Returns a String.
· index Number
· delimiterChar String
· exceptDoubleQuoted Boolean
· exceptEscaped Boolean
Introduced in version 9.5.0.62

Returns the Nth substring in string that is a list delimted by delimiterChar. The first substring is at index 0. If exceptDoubleQuoted is true, then the delimiter char found between double quotes is not treated as a delimiter. If exceptEscaped is true, then an escaped (with a backslash) delimiter char is not treated as a delimiter.

Returns null on failure

More Information and Examples
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GetRange
var retStr = GetRange(startIndex, numChars, removeFlag);
· Returns a String.
· startIndex Number
· numChars Number
· removeFlag Boolean
Introduced in version 9.5.0.87

Returns a string containing the specified range of characters from this instance. If removeFlag is true, then the range of chars is removed from this instance.

Note: It was discovered that the range of chars was always removed regardless of the value of removeFlag. This is fixed in v9.5.0.89.

Returns null on failure

More Information and Examples
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LastNLines
var retStr = LastNLines(numLines, bCrlf);
· Returns a String.
· numLines Number
· bCrlf Boolean
Introduced in version 9.5.0.62

Returns the last N lines of the text. If fewer than numLines lines exists, then all of the text is returned. If bCrlf is true, then the line endings of the returned string are converted to CRLF, otherwise the line endings are converted to LF-only.

Returns null on failure

More Information and Examples
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LoadFile
var status = LoadFile(path, charset);
· Returns Boolean (true for success, false for failure).
· path String
· charset String
Introduced in version 9.5.0.62

Loads the contents of a file.

Returns true for success, false for failure.

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Obfuscate
Obfuscate();
· Does not return anything (returns Undefined).
Introduced in version 9.5.0.80

Obfuscates the string. (The Unobfuscate method can be called to reverse the obfuscation to restore the original string.)

The Chilkat string obfuscation algorithm works by taking the utf-8 bytes of the string, base64 encoding it, and then scrambling the letters of the base64 encoded string. It is deterministic in that the same string will always obfuscate to the same result. It is NOT a secure way of encrypting a string. It is only meant to be a simple means of transforming a string into something unintelligible.

More Information and Examples
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Prepend
var status = Prepend(value);
· Returns Boolean (true for success, false for failure).
· value String
Introduced in version 9.5.0.61

Prepends a copy of the specified string to this instance.

Returns true for success, false for failure.

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PunyDecode
var status = PunyDecode();
· Returns Boolean (true for success, false for failure).
Introduced in version 9.5.0.71

In-place decodes the string from punycode.

Returns true for success, false for failure.

More Information and Examples
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PunyEncode
var status = PunyEncode();
· Returns Boolean (true for success, false for failure).
Introduced in version 9.5.0.71

In-place encodes the string to punycode.

Returns true for success, false for failure.

More Information and Examples
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RemoveAccents
var status = RemoveAccents();
· Returns Boolean (true for success, false for failure).
Introduced in version 9.5.0.91

Removes the accents (diacritics) from European accented characters. This applies only to the accented characters found in the Windows-1252 (Latin alphabet) and Windows-1250 (Central European) charsets. Accent marks for characters in other languages will not be removed.

Returns true for success, false for failure.

More Information and Examples
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RemoveAfterFinal
var status = RemoveAfterFinal(marker);
· Returns Boolean (true for success, false for failure).
· marker String
Introduced in version 9.5.0.77

Removes the substring found after the final occurrence of the marker. Also removes the marker. Returns true if the marker was found and content was removed. Otherwise returns false.

Returns true for success, false for failure.

More Information and Examples
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RemoveBefore
var status = RemoveBefore(marker);
· Returns Boolean (true for success, false for failure).
· marker String
Introduced in version 9.5.0.77

Removes the substring found before the 1st occurrence of the marker. Also removes the marker. Returns true if the marker was found and content was removed. Otherwise returns false.

Returns true for success, false for failure.

More Information and Examples
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RemoveCharsAt
var status = RemoveCharsAt(startIndex, numChars);
· Returns Boolean (true for success, false for failure).
· startIndex Number
· numChars Number
Introduced in version 9.5.0.87

Removes the specified range of characters from this instance.

Returns true for success, false for failure.

More Information and Examples
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Replace
var retInt = Replace(value, replacement);
· Returns a Number.
· value String
· replacement String
Introduced in version 9.5.0.58

Replaces all occurrences of a specified string in this instance with another specified string. Returns the number of replacements.

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ReplaceAfterFinal
var status = ReplaceAfterFinal(marker, replacement);
· Returns Boolean (true for success, false for failure).
· marker String
· replacement String
Introduced in version 9.5.0.73

Replaces the content found after the final occurrence of marker with replacement.

Returns true for success, false for failure.

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ReplaceAllBetween
var status = ReplaceAllBetween(beginMark, endMark, replacement, replaceMarks);
· Returns Boolean (true for success, false for failure).
· beginMark String
· endMark String
· replacement String
· replaceMarks Boolean
Introduced in version 9.5.0.64

Replaces the first occurrence of ALL the content found between beginMark and endMark with replacement. The beginMark and endMark are included in what is replaced if replaceMarks is true.

Returns true for success, false for failure.

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ReplaceBetween
var retInt = ReplaceBetween(beginMark, endMark, value, replacement);
· Returns a Number.
· beginMark String
· endMark String
· value String
· replacement String
Introduced in version 9.5.0.62

Replaces all occurrences of value with replacement, but only where value is found between beginMark and endMark. Returns the number of replacements made.

More Information and Examples
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ReplaceFirst
var status = ReplaceFirst(value, replacement);
· Returns Boolean (true for success, false for failure).
· value String
· replacement String
Introduced in version 9.5.0.77

Replaces the first occurrence of a specified string in this instance with another string. Returns true if the value was found and replaced. Otherwise returns false.

Returns true for success, false for failure.

More Information and Examples
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ReplaceI
var retInt = ReplaceI(value, replacement);
· Returns a Number.
· value String
· replacement Number
Introduced in version 9.5.0.67

Replaces all occurrences of value with the decimal integer replacement. Returns the number of replacements.

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ReplaceNoCase
var retInt = ReplaceNoCase(value, replacement);
· Returns a Number.
· value String
· replacement String
Introduced in version 9.5.0.82

Replaces all occurrences of value with replacement (case insensitive). Returns the number of replacements.

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ReplaceWord
var retInt = ReplaceWord(value, replacement);
· Returns a Number.
· value String
· replacement String
Introduced in version 9.5.0.62

Replaces all word occurrences of a specified string in this instance with another specified string. Returns the number of replacements made.

Important: This method is limited to replacing whole words in strings that only contains characters in the Latin1 charset (i.e. iso-8859-1 or Windows-1252). A whole word can only contain alphanumeric chars where the alpha chars are restricted to those of the Latin1 alpha chars. (The underscore character is also considered part of a word.)

More Information and Examples
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SecureClear
SecureClear();
· Does not return anything (returns Undefined).
Introduced in version 9.5.0.67

Removes all characters from the current StringBuilder instance, and write zero bytes to the allocated memory before deallocating.

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SetNth
var status = SetNth(index, value, delimiterChar, exceptDoubleQuoted, exceptEscaped);
· Returns Boolean (true for success, false for failure).
· index Number
· value String
· delimiterChar String
· exceptDoubleQuoted Boolean
· exceptEscaped Boolean
Introduced in version 9.5.0.62

Sets the Nth substring in string in a list delimted by delimiterChar. The first substring is at index 0. If exceptDoubleQuoted is true, then the delimiter char found between double quotes is not treated as a delimiter. If exceptEscaped is true, then an escaped (with a backslash) delimiter char is not treated as a delimiter.

Returns true for success, false for failure.

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SetString
var status = SetString(value);
· Returns Boolean (true for success, false for failure).
· value String
Introduced in version 9.5.0.61

Sets this instance to a copy of the specified string.

Returns true for success, false for failure.

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Shorten
var status = Shorten(numChars);
· Returns Boolean (true for success, false for failure).
· numChars Number
Introduced in version 9.5.0.87

Shortens the string by removing the last numChars chars.

Returns true for success, false for failure.

More Information and Examples
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StartsWith
var retBool = StartsWith(substr, caseSensitive);
· Returns a Boolean.
· substr String
· caseSensitive Boolean
Introduced in version 9.5.0.62

Returns true if the string starts with substr. Otherwise returns false. The comparison is case sensitive if caseSensitive is true, and case insensitive if caseSensitive is false.

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ToCRLF
var status = ToCRLF();
· Returns Boolean (true for success, false for failure).
Introduced in version 9.5.0.62

Converts line endings to CRLF (Windows) format.

Returns true for success, false for failure.

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ToLF
var status = ToLF();
· Returns Boolean (true for success, false for failure).
Introduced in version 9.5.0.62

Converts line endings to LF-only (UNIX) format.

Returns true for success, false for failure.

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ToLowercase
var status = ToLowercase();
· Returns Boolean (true for success, false for failure).
Introduced in version 9.5.0.62

Converts the contents to lowercase.

Returns true for success, false for failure.

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ToUppercase
var status = ToUppercase();
· Returns Boolean (true for success, false for failure).
Introduced in version 9.5.0.62

Converts the contents to uppercase.

Returns true for success, false for failure.

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Trim
var status = Trim();
· Returns Boolean (true for success, false for failure).
Introduced in version 9.5.0.62

Trims whitespace from both ends of the string.

Returns true for success, false for failure.

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TrimInsideSpaces
var status = TrimInsideSpaces();
· Returns Boolean (true for success, false for failure).
Introduced in version 9.5.0.62

Replaces all tabs, CR's, and LF's, with SPACE chars, and removes extra SPACE's so there are no occurances of more than one SPACE char in a row.

Returns true for success, false for failure.

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Unobfuscate
Unobfuscate();
· Does not return anything (returns Undefined).
Introduced in version 9.5.0.80

Unobfuscates the string.

The Chilkat string obfuscation algorithm works by taking the utf-8 bytes of the string, base64 encoding it, and then scrambling the letters of the base64 encoded string. It is deterministic in that the same string will always obfuscate to the same result. It is not a secure way of encrypting a string. It is only meant to be a simple means of transforming a string into something unintelligible.

More Information and Examples
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WriteFile
var status = WriteFile(path, charset, emitBom);
· Returns Boolean (true for success, false for failure).
· path String
· charset String
· emitBom Boolean
Introduced in version 9.5.0.62

Writes the contents to a file. If emitBom is true, then the BOM (also known as a preamble), is emitted for charsets that define a BOM (such as utf-8, utf-16, utf-32, etc.)

Returns true for success, false for failure.

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WriteFileIfModified
var status = WriteFileIfModified(path, charset, emitBom);
· Returns Boolean (true for success, false for failure).
· path String
· charset String
· emitBom Boolean
Introduced in version 9.5.0.73

Writes the contents to a file, but only if it is a new file or if the contents are different than the existing file. If emitBom is true, then the BOM (also known as a preamble), is emitted for charsets that define a BOM (such as utf-8, utf-16, utf-32, etc.)

Returns true for success, false for failure.

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