JavaScript Regular Expressions

/** * Created by Administrator on 2015/4/9. */var Result;var log = function (result) {    console.log (result);};/ /1 matches end of number//30cac0040 = 0040//3sfadf92 = 92///\d+$/g:1 \d match number; 2 + one or more occurrences; 3 $ end Occurrences 4 G global search var str1 = ' 30 CAC0040 ',    str2 = ' 3sfadf92 '; result = Str1.match (/\d+$/g);//0040result = Str2.match (/\d+$/g);//92//2 regular match whitespace problem//  The character interval within the string has an indefinite number of spaces, requiring a uniform space//  /\s+/g 1 \s match space; 2 + one or more occurrences; 3 G global Search str1 = '  blue   think '; var reg =/\s+/g;str1 = Str1.replace (Reg, ");//Blue Ideal log (STR1);//Determine if the string is composed of numbers//  /^\d+$/;  1 ^ start; 2 $ end 3 + occurrences 0 or more times str1 = ' Asdw2562fsz '; str2 = ' 123456 '; reg =/^\d+$/;log (Reg.test ('));//falselog (Reg.test (str2)); True

　　

4 cell phone number Regular expression//4.1 ignore the preceding 0, support 13, 15 start///^0? (13|15) \d{9}$/1 ^0? : 0 appears 0 times or once; 2 (13|15) 13 or 3 \d{9}$ number 9 times and ends str1 = 013999999999;reg =/^0? (13|15) \d{9}$/;log (Reg.test (str1));

　　

5 Remove the space/  //^\s+|\s+$/g 1 ^\s+  One or more spaces out of the starting position; 2 \s+$ ends with one or more spaces 3 | or//5.1 remove the left and right spaces var trimall = function (str) {    return str.replace (/^\s+|\s+$/g, ');};/ /5.2 Remove left space var Lefttrim = function (str) {    return str.replace (/^\s+/g, ');};/ /5.3 Remove the space on the right var Righttrim = function (str) {    return str.replace (/\s+$/g, ');}; str1 = '         asdasf        '; log (' Trim: '); log (Trimall (str1)); log (' Left Trim: ') log (Lefttrim (str1)); log (' Trim: ') Log (Righttrim (str1));

　　

JavaScript Regular Expressions