javascript jQuery - 检查字符串是否包含数值
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jQuery - check whether string contains numeric value
提问by shennyL
How to check whether a string contains any numeric value by jquery?
如何通过jquery检查字符串是否包含任何数值？
I search through many examples but I only get the way to check for a number, NOT number in a STRING. I am trying to find something like $(this).attr('id').contains("number");
我搜索了许多示例，但我只能找到检查数字的方法，而不是 STRING 中的数字。我试图找到类似的东西$(this).attr('id').contains("number");
(p/s: my DOM id will be something like Large_a(without numeric value) , Large_a_1(with numeric value), Large_a_2, etc.)
（p/s：我的 DOM id 将类似于Large_a(without numeric value) , Large_a_1(with numeric value) Large_a_2, 等）
What method should I use?
我应该使用什么方法？
采纳答案by Mathieu Rodic
This code detects trailing digits preceded by the underscoresymbol (azerty1_2would match "2", but azerty1would not match):
此代码检测以下划线符号开头的尾随数字（azerty1_2将匹配“2”，但azerty1不匹配）：
if (matches = this.id.match(/_(\d)+$/))
{
alert(matches[1]);
}
回答by Darin Dimitrov
You could use a regular expression:
您可以使用正则表达式：
var matches = this.id.match(/\d+/g);
if (matches != null) {
// the id attribute contains a digit
var number = matches[0];
}
回答by RobG
Simple version:
简单版：
function hasNumber(s) {
return /\d/.test(s);
}
More efficient version (keep regular expression in a closure):
更高效的版本（在闭包中保留正则表达式）：
var hasNumber = (function() {
var re = /\d/;
return function(s) {
return re.test(s);
}
}());
