Question

我有一个投入领域,无论是否希望投入百分之百的价值或固定数额,即必须用百分比的表示加以核对。

样本投入

12%
12.888%
12.00%
12.00001%
12.123344%

或固定数额

100
100.55252
100.254575

类似情况。

N.B:我想学习 j语......提出任何建议?

Answer 1

j Query使用Java的定期表述。这是一个良好的起点:https://developer.mozilla.org/en/Jhrform/Guide/Regular_Expressions 。

您的需要,/[0-9]*? [0-9]+%/将是有益的。

Answer 2

/%$/.test( "35%" ); >> true
/%$/.test( "100" ); >> false
/%$/.test( "35.555%" ); >> true
/%$/.test( "35.555" );  >> false

Take a look at Mozilla Developer Network for some more info: https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/RegExp

Answer 3

以前的所有建议都是出色的。根据你们的需要,你可以选择其中的任何一项。我在下面增加一点,以抵消你的价值。为满足你们的需要而修改。

function getValue(num) {
   var matches=num.match(/(^s*d+.?d*)(%)?s*$/);
   var m = false, p = false, v = 0;
   if (matches) {
      m = true;
      p = (matches[2]=="%");
      v = matches[1];
   }
   return {isMatch: m, isPercent: p, value: v};
}

var vals = "12%,12.888%,12.00%,12.00001%,12.123344%,100,100.,100.55252,100.254575,notnum".split( , );
for(var i=0;i<vals.length;i++) {
   var gv = getValue(vals[i]);
   console.log("string="+vals[i],"  isMatch="+gv.isMatch,"  isPercent="+gv.isPercent,"  value="+gv.value);
}

产出是:

string=12% isMatch=true isPercent=true value=12
string=12.888% isMatch=true isPercent=true value=12.888
string=12.00% isMatch=true isPercent=true value=12.00
string=12.00001% isMatch=true isPercent=true value=12.00001
string=12.123344% isMatch=true isPercent=true value=12.123344
string=100 isMatch=true isPercent=false value=100
string=100. isMatch=true isPercent=false value=100.
string=100.55252 isMatch=true isPercent=false value=100.55252
string=100.254575 isMatch=true isPercent=false value=100.254575
string=notnum isMatch=false isPercent=false value=0

Answer 4

As Anon has already suggested, you don t really need to use Regular Expressions to solve this problem. What s wrong with:

var number = "12.888%";
if(number[number.length - 1] ===  % ) {
  //processing...
}

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