Javascript 计算字符串中整数的个数
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Count the number of integers in a string
提问by David
how can I count the number of integers in a string using jQuery or javascript?
如何使用 jQuery 或 javascript 计算字符串中整数的数量？
For example g66ghy7 = 3
例如 g66ghy7 = 3
回答by Ricardo Tomasi
I find this to look pretty/simple:
我觉得这看起来很漂亮/简单：
var count = ('1a2b3c'.match(/\d/g) || []).length
A RegExp will probably perform better (it appears):
RegExp 可能会表现得更好（看起来）：
var r = new RegExp('\d', 'g')
, count = 0
while(r.exec('1a2b3c')) count++;
回答by cillierscharl
The simplest solution would be to use a regular expression to replace all butthe numeric values and pull out the length afterwards. Consider the following:
最简单的解决办法是使用正则表达式替换所有，但该数值，之后拉出长。考虑以下：
var s = 'g66ghy7';
alert(s.replace(/\D/g, '').length); //3
回答by scessor
A little longer alternative is to convert each char to a number; if it doesn't fail, raise the counter.
更长的替代方法是将每个字符转换为数字；如果没有失败，请提高计数器。
var sTest = "g66ghy7";
var iCount = 0;
for (iIndex in sTest) {
if (!isNaN(parseInt(sTest[iIndex]))) {
iCount++;
}
}
alert(iCount);
Also see my jsfiddle.
另请参阅我的jsfiddle。
