Question

javascript正则表达式判断一段字符串是否包含数字，

Answer 1

var re = /(.+)?\d(.+)?/;
re.test("fff");false
re.test("111");true
re.test("fff1");true
re.test("ff1f");true

Answer 2

若测试字符串a中是否有数字：

new RegExp(/[0-9]/g).test(a);

Answer 3

var re2 =/\d+/gi;

alert(re2.test(str));

str是被判断的字符串

Answer 4

function test(){
var regx = /\d+/;
alert(regx.test("sd3f2wf"));
}

Answer 5

var reg = /^(?=.*\d.*\b)/;
var str = "adbf3sdfadf";
console.log(reg.test(str));