Javascript拆分条件

Question

我们走了，我有变量：

var possible_country = 'United States|Germany|Canada|United Kingdom';
var current_country = 'United States';

我想像这样使用条件作为函数

function dummy(c, p){
 var arr = p.split('|');

 /* Code I want */

 if(c === arr[0] || c === arr[1] || c === arr[2] || c === arr[3])
 {
  alert('Voila');
 }
}

所以我可以像这样调用虚拟函数

dummy(current_country, possible_country);

Answer 1

我想你想要indexOf：

function dummy(c, p){
 var arr = p.split('|');

 if(~arr.indexOf(p)) { // arr contains p as one of its elements
  alert('Voila');
 }
}

Answer 2

对数组使用.indexOf方法：

var possible_country = 'United States|Germany|Canada|United Kingdom';
var current_country = 'United States';

possible_country = possible_country.split('|'); //Split by |
alert(possible_country.indexOf(current_country)); //Search for the current_country inside fo possible_country.

作为一项功能：

function dummy(current, possible) {
    var arr = possible.split('|');
    if (arr.indexOf(current) != -1) {
        alert('voila');
    }
}

Answer 3

这个？

function dummy(c, p){
  var arr = p.split('|');
  for (var i in arr)
    if (arr[i]===c)
      alert("OK");
  alert("KO");
}

Answer 4

如果你把管杆放在最后

var possible_country = 'United States|Germany|Canada|United Kingdom|';

你只需要一行检查：

if (possible_country.indexOf(current_country + '|') > -1)
{
    alert('Voila');
}