length
|
The number of characters in the string.
>>> new String('four').length
4
|
charAt(pos)
|
Returns the character at the specified position. Positions start at 0.
>>> "script".charAt(0);
"s"
|
charCodeAt(pos)
|
Returns the code of the character at the specified position.
>>> "script".charCodeAt(0);
115
|
concat(str1, str2, ....)
|
Return a new string glued from the input pieces.
>>> "".concat('zig', '-', 'zag');
"zig-zag"
|
indexOf(needle, start)
|
If the needle matches a part of the string, the position of the match is returned. The optional second parameter tells where the search should start from. Returns -1 if no match is found.
>>> "javascript".indexOf('scr')
4
>>> "javascript".indexOf('scr', 5)
-1
|
lastIndexOf(needle, start)
|
Same as indexOf() but starts the search from the end of the string. The last occurence of "a":
>>> "javascript".lastIndexOf('a')
3
|
localeCompare(needle)
|
Compares two strings in the current locale. Returns 0 if the two strings are equal, 1 if the needle gets sorted before the string object, -1 otherwise.
>>> "script".localeCompare('crypt')
1
>>> "script".localeCompare('sscript')
-1
>>> "script".localeCompare('script')
0
|
match(regexp)
|
Accepts a regular expression object and returns an array of matches.
>>> "R2-D2 and C-3PO".match(/[0-9]/g)
["2", "2", "3"]
|
replace(needle, replacement)
|
Allows you to replace the matching results of a regexp pattern. The replacement can also be a callback function. Capturing patterns are available as $1, $2,...$9 .
>>> "R2-D2".replace(/2/g, '-two')
"R-two-D-two"
>>> "R2-D2".replace(/(2)/g, '$1$1')
"R22-D22"
|
search(regexp)
|
Returns the position of the first regular expression match.
>>> "C-3PO".search(/[0-9]/)
2
|
slice(start, end)
|
Returns the part of a string identified by start and end position. If start is negative, then the start position is length + start , similarly if the end parameter is negative, the end position is length + end .
>>> "R2-D2 and C-3PO".slice(4,13)
"2 and C-3"
>>> "R2-D2 and C-3PO".slice(4,-1)
"2 and C-3P"
|
split(separator, limit)
|
Turns a string into an array. The second parameter, limit , is optional. The separator can also be a regular expression.
>>> "1,2,3,4".split(',')
["1", "2", "3", "4"]
>>> "1,2,3,4".split(',', 2)
["1", "2"]
|
substring(start, end)
|
Similar to slice() . When start or end are negative or invalid, they are considered 0. If they are greater than the string length, they are considered to be the length. If end > start , their values are swapped.
>>> "R2-D2 and C-3PO".substring(4, 13)
"2 and C-3"
>>> "R2-D2 and C-3PO".substring(13, 4)
"2 and C-3"
|
toLowerCase()
toLocaleLowerCase()
|
Transforms the string to lower case.
>>> "JAVA".toLowerCase()
"java"
|
toUpperCase()
toLocaleUpperCase()
|
Transforms the string to upper case.
>>> "script".toUpperCase()
"SCRIPT"
|