Essentials of Javascript - Cultural View

JavaScript syntax 27
Regular Expression
/expression/.test(string);
"string".search(/expression/);
"string".replace(/expression/,replacement);
// Here are some examples
if(/Tom/.test("My name is Tom")) alert("Hello Tom!");
alert("My name is Tom".search(/Tom/)); // == 11
(letters before Tom)
alert("My name is Tom".replace(/Tom/,"John")); // == "My
name is John"
Character Classes:
// \d - digit
// \D - non digit
// \s - space
// \S - non space
// \w - word char
// \W - non word
// [ ] - one of
// [^ ] - one not of
// - - range
if(/\d/.test('0')) alert('Digit');
if(/[0-9]/.test('5')) alert('Digit');
if(/[13579]/.test('1')) alert('Odd number');
if(/\S\S\s\S\S\S\S/.test('My name')) alert('Format OK');
if(/\w\w\w/.test('Tom')) alert('Format OK');
if(/[a-z]/.test('b')) alert('Small letter');
if(/[A-Z]/.test('B')) alert('Big letter');
if(/[a-zA-Z]/.test('B')) alert('Letter');
Character matching:
// A...Z a...z 0...9 - alphanumeric
// \u0000...\uFFFF - Unicode hexadecimal
// \x00...\xFF - ASCII hexadecimal
// \t - tab
// \n - new line
// \r - CR
// . - any character
// | - OR
if(/T.m/.test('Tom')) alert ('Hi Tom, Tam or Tim');
if(/A|B/.test("A")) alert ('A or B');
Repeaters: