goog.string

Replaces Windows and Mac new lines with unix style: \r or \r\n with \n.

Capitalizes a string, i.e. converts the first letter to uppercase and all other letters to lowercase, e.g.:

goog.string.capitalize('one') => 'One' goog.string.capitalize('ONE') => 'One' goog.string.capitalize('one two') => 'One two'

Note that this function does not trim initial whitespace.

A string comparator that ignores case. -1 = str1 less than str2 0 = str1 equals str2 1 = str1 greater than str2

Determines whether a string contains a substring, ignoring case.

Case-insensitive suffix-checker.

Case-insensitive equality checker.

Case-insensitive prefix-checker.

Removes the breaking spaces from the left and right of the string and collapses the sequences of breaking spaces in the middle into single spaces. The original and the result strings render the same way in HTML.

Converts multiple whitespace chars (spaces, non-breaking-spaces, new lines and tabs) to a single space, and strips leading and trailing whitespace.

Compares two version numbers.

Determines whether a string contains a substring.

Returns the non-overlapping occurrences of ss in s. If either s or ss evalutes to false, then returns zero.

Generates and returns a string which is unique in the current document. This is useful, for example, to create unique IDs for DOM elements.

Computes the Levenshtein edit distance between two strings.

Fast suffix-checker.

Takes a character and returns the escaped string for that character. For example escapeChar(String.fromCharCode(15)) -> "\x0E".

Takes a string and returns the escaped string for that input string.

String comparison function that handles non-negative integer and fractional numbers in a way humans might expect. Using this function, the string 'File 2.jpg' sorts before 'File 10.jpg', and '3.14' before '3.2'. Equivalent to goog.string.intAwareCompare apart from the way how it interprets dots.

Returns a string with at least 64-bits of randomness.

Doesn't trust JavaScript's random function entirely. Uses a combination of random and current timestamp, and then encodes the string in base-36 to make it shorter.

String hash function similar to java.lang.String.hashCode(). The hash code for a string is computed as s[0] * 31 ^ (n - 1) + s[1] * 31 ^ (n - 2) + ... + s[n - 1], where s[i] is the ith character of the string and n is the length of the string. We mod the result to make it between 0 (inclusive) and 2^32 (exclusive).

Escapes double quote '"' and single quote ''' characters in addition to '&', '<', and '>' so that a string can be included in an HTML tag attribute value within double or single quotes.

It should be noted that > doesn't need to be escaped for the HTML or XML to be valid, but it has been decided to escape it for consistency with other implementations.

With goog.string.DETECT_DOUBLE_ESCAPING, this function escapes also the lowercase letter "e".

NOTE(user): HtmlEscape is often called during the generation of large blocks of HTML. Using statics for the regular expressions and strings is an optimization that can more than half the amount of time IE spends in this function for large apps, since strings and regexes both contribute to GC allocations.

Testing for the presence of a character before escaping increases the number of function calls, but actually provides a speed increase for the average case -- since the average case often doesn't require the escaping of all 4 characters and indexOf() is much cheaper than replace(). The worst case does suffer slightly from the additional calls, therefore the opt_isLikelyToContainHtmlChars option has been included for situations where all 4 HTML entities are very likely to be present and need escaping.

Some benchmarks (times tended to fluctuate +-0.05ms): FireFox IE6 (no chars / average (mix of cases) / all 4 chars) no checks 0.13 / 0.22 / 0.22 0.23 / 0.53 / 0.80 indexOf 0.08 / 0.17 / 0.26 0.22 / 0.54 / 0.84 indexOf + re test 0.07 / 0.17 / 0.28 0.19 / 0.50 / 0.85

An additional advantage of checking if replace actually needs to be called is a reduction in the number of object allocations, so as the size of the application grows the difference between the various methods would increase.

String comparison function that handles non-negative integer numbers in a way humans might expect. Using this function, the string 'File 2.jpg' sorts before 'File 10.jpg', and 'Version 1.9' before 'Version 1.10'. The comparison is mostly case-insensitive, though strings that are identical except for case are sorted with the upper-case strings before lower-case.

This comparison function is up to 50x slower than either the default or the case-insensitive compare. It should not be used in time-critical code, but should be fast enough to sort several hundred short strings (like filenames) with a reasonable delay.

Checks if a string contains all letters.

Checks if a string contains only numbers or letters.

Checks if a string is all breaking whitespace.

Checks if a string is empty or contains only whitespaces.

Checks if a string is empty or contains only whitespaces.

Checks if a string is null, undefined, empty or contains only whitespaces.

Checks if a string is null, undefined, empty or contains only whitespaces.

Checks if a string is empty.

Returns whether the given string is lower camel case (e.g. "isFooBar").

Note that this assumes the string is entirely letters.

Checks if a string contains only numbers.

Checks if a character is a space character.

Checks if a character is a valid unicode character.

Returns whether the given string is upper camel case (e.g. "FooBarBaz").

Note that this assumes the string is entirely letters.

Finds the characters to the right of the last instance of any separator

This function is similar to goog.string.path.baseName, except it can take a list of characters to split the string on. It will return the rightmost grouping of characters to the right of any separator as a left-to-right oriented string.

Returns a string representation of the given object, with null and undefined being returned as the empty string.

Converts \n to
s or
s.

Normalizes spaces in a string, replacing all consecutive spaces and tabs with a single space. Replaces non-breaking space with a space.

Normalizes whitespace in a string, replacing all whitespace chars with a space.

Alias for goog.string.floatAwareCompare.

Pads number to given length and optionally rounds it to a given precision. For example:

padNumber(1.25, 2, 3) -> '01.250'
 padNumber(1.25, 2) -> '01.25'
 padNumber(1.25, 2, 1) -> '01.3'
 padNumber(1.25, 0) -> '1.25'

Parse a string in decimal or hexidecimal ('0xFFFF') form.

To parse a particular radix, please use parseInt(string, radix) directly. See https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/parseInt

This is a wrapper for the built-in parseInt function that will only parse numbers as base 10 or base 16. Some JS implementations assume strings starting with "0" are intended to be octal. ES3 allowed but discouraged this behavior. ES5 forbids it. This function emulates the ES5 behavior.

For more information, see Mozilla JS Reference: http://goo.gl/8RiFj

Preserve spaces that would be otherwise collapsed in HTML by replacing them with non-breaking space Unicode characters.

Encloses a string in double quotes and escapes characters so that the string is a valid JS string. The resulting string is safe to embed in <script> tags as "<" is escaped.

Escapes characters in the string that are not safe to use in a RegExp.

Removes the first occurrence of a substring from a string.

Removes all occurrences of a substring from a string.

Removes a substring of a specified length at a specific index in a string.

Repeats a string n times.

Replaces all occurrences of a substring of a string with a new substring.

Splits a string on a separator a limited number of times.

This implementation is more similar to Python or Java, where the limit parameter specifies the maximum number of splits rather than truncating the number of results.

See http://docs.python.org/2/library/stdtypes.html#str.split See JavaDoc: http://goo.gl/F2AsY See Mozilla reference: http://goo.gl/dZdZs

Fast prefix-checker.

Takes a string and replaces newlines with a space. Multiple lines are replaced with a single space.

Strip quote characters around a string. The second argument is a string of characters to treat as quotes. This can be a single character or a string of multiple character and in that case each of those are treated as possible quote characters. For example:

 goog.string.stripQuotes('"abc"', '"`') --> 'abc'
 goog.string.stripQuotes('`abc`', '"`') --> 'abc'
 

Does simple python-style string substitution. subs("foo%s hot%s", "bar", "dog") becomes "foobar hotdog".

Converts a string from selector-case to camelCase (e.g. from "multi-part-string" to "multiPartString"), useful for converting CSS selectors and HTML dataset keys to their equivalent JS properties.

Converts the supplied string to a number, which may be Infinity or NaN. This function strips whitespace: (toNumber(' 123') === 123) This function accepts scientific notation: (toNumber('1e1') === 10)

This is better than JavaScript's built-in conversions because, sadly: (Number(' ') === 0) and (parseFloat('123a') === 123)

Converts a string from camelCase to selector-case (e.g. from "multiPartString" to "multi-part-string"), useful for converting JS style and dataset properties to equivalent CSS selectors and HTML keys.

Converts a string into TitleCase. First character of the string is always capitalized in addition to the first letter of every subsequent word. Words are delimited by one or more whitespaces by default. Custom delimiters can optionally be specified to replace the default, which doesn't preserve whitespace delimiters and instead must be explicitly included if needed.

Default delimiter => " ": goog.string.toTitleCase('oneTwoThree') => 'OneTwoThree' goog.string.toTitleCase('one two three') => 'One Two Three' goog.string.toTitleCase(' one two ') => ' One Two ' goog.string.toTitleCase('one_two_three') => 'One_two_three' goog.string.toTitleCase('one-two-three') => 'One-two-three'

Custom delimiter => "-.": goog.string.toTitleCase('oneTwoThree', '-.') => 'OneTwoThree' goog.string.toTitleCase('one two three', '-.') => 'One two three' goog.string.toTitleCase(' one two ', '-.') => ' one two ' goog.string.toTitleCase('one_two_three', '-.') => 'One_Two_Three' goog.string.toTitleCase('one-two-three', '-.') => 'One-Two-Three' goog.string.toTitleCase('one...two...three', '-.') => 'One...Two...Three' goog.string.toTitleCase('one. two. three', '-.') => 'One. two. three' goog.string.toTitleCase('one-two.three', '_-.') => 'One-Two.Three'

Trims white spaces to the left and right of a string.

Trims whitespaces at the left end of a string.

Trims whitespaces at the right end of a string.

Truncates a string to a certain length and adds '...' if necessary. The length also accounts for the ellipsis, so a maximum length of 10 and a string 'Hello World!' produces 'Hello W...'.

Truncate a string in the middle, adding "..." if necessary, and favoring the beginning of the string.

Unescapes an HTML string.

Unescapes a HTML string using the provided document.

URL-decodes the string. We need to specially handle '+'s because the javascript library doesn't convert them to spaces.

URL-encodes a string

Do escaping of whitespace to preserve spatial formatting. We use character entity #160 to make it safer for xml.

Enables HTML escaping of lowercase letter "e" which helps with detection of double-escaping as this letter is frequently used.

Whether to force non-dom html unescaping.