regexp review

Modifiers

i:match ignore case
g:match global
m:match mult-line

regexp mode

about [] or ():

[abc]:match content in []，eg:[0-9] match number in 0-9

(x|y)：match content split by "|"

about single character:

\d:  number

\s:  white space

\b:  end of word

\uxxxx:  Hex charactor

about quantifier

n+: content contains at least one  'n'
n*: content contains 'n' number amount 0 or n
n?: content contains 'n' number amount 0 or 1

Method for regexp

test()

var patt = /e/;
patt.test("The best things in life are free!");

exec()

/e/.exec("The best things in life are free!");

Commonly Method In Js

search()

var str = "Visit w3cschool!";
var n = str.search("w3cschool");

replace()

var str = "Visit Microsoft!";
var res = str.replace(/microsoft/i, "w3cschool");

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                                                > ___code form w3c