Javascript Strings

Revision as of 11:01, 11 September 2013

Although the String object is not directly supported by Yate's Javascript these methods are applicable to most non-object variables.

Note that these are not real properties of strings and cannot be enumerated!

• length

Property that describes the length of a string as a decimal number.

Returns numeric length of string

x="abcd";
Engine.output(x.length);

4

• charAt(pos)

Function that returns a character at a certain 0-based position in string.

Returns a string containing a single character or empty if pos is out of bounds.

x="abcd";
Engine.output(x.charAt(3));

d

• indexOf(str)

Function that returns the position of a substring in another string.

Returns 0-based position of str or -1 if str is not found

x="abcd";
Engine.output(x.indexOf("bc"));

1

• substr(offs,len)

Function that returns a substring.

Returns a string that starts at 0-based position offs and has at most len characters

x="abcd";
Engine.output(x.substr(1,2));

bc

• substr(offs)

Function that returns a substring.

Returns a string that starts at 0-based position offs to the end of the original string

x="abcd";
Engine.output(x.substr(2));

cd

• match(reg)

Function that matches a string against a Regular Expression.

• toLowerCase()

Function that converts a string to lower case.

• toUpperCase()

Function that converts a string to upper case.

• trim()

Function that removes leading and trailing spaces from a string.

• sqlEscape()

Function that performs SQL escaping on a string.

• startsWith(str)

Function that checks if a string starts with a specific substring.

• endsWith(str)

Function that checks if a string ends with a specific substring.

• split(sep)

Function that splits a string into an Array at a separator.

• toString()

Function that converts a number to string using numbering base 10.

• toString(base)

Function that converts a number to string using a specified numbering base.