如何比较 JavaScript 中包含字符串的两个变量？
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How do I compare two variables containing strings in JavaScript?
提问by InvincibleWolf
I want compare two variables, that are strings, but I am getting an error.
我想比较两个变量，即字符串，但出现错误。
<script>
var to_check=$(this).val();
var cur_string=$("#0").text();
var to_chk = "that";
var cur_str= "that";
if(to_chk==cur_str){
alert("both are equal");
$("#0").attr("class","correct");
} else {
alert("both are not equal");
$("#0").attr("class","incorrect");
}
</script>
Is something wrong with my if statement?
我的 if 语句有问题吗？
采纳答案by Anders Lindén
===is not necessary. You know both values are strings so you dont need to compare types.
===没有必要。您知道这两个值都是字符串，因此您不需要比较类型。
function do_check()
{
var str1 = $("#textbox1").val();
var str2 = $("#textbox2").val();
if (str1 == str2)
{
$(":text").removeClass("incorrect");
alert("equal");
}
else
{
$(":text").addClass("incorrect");
alert("not equal");
}
}.incorrect
{
background: #ff8888;
}<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<input id="textbox1" type="text">
<input id="textbox2" type="text">
<button onclick="do_check()">check</button>回答by anztrax
instead of using the ==sign, more safer use the ===sign when compare, the code that you post is work well
而不是使用==标志，比较时使用标志更安全===，您发布的代码运行良好
回答by Sivakumar Jallu
I used below function to compare two strings and It is working good.
我使用下面的函数来比较两个字符串，它运行良好。
function CompareUserId (first, second)
{
var regex = new RegExp('^' + first+ '$', 'i');
if (regex.test(second))
{
return true;
}
else
{
return false;
}
return false;
}
回答by Kiran Chenna
You can use javascript dedicate string compare method string1.localeCompare(string2). it will five you -1if the string not equals, 0for strings equal and 1if string1 is sorted after string2.
您可以使用 javascript 专用字符串比较方法string1.localeCompare(string2)。这将分为五个你-1如果字符串不等于，0字符串相等，1如果string1为字符串2后排序。
<script>
var to_check=$(this).val();
var cur_string=$("#0").text();
var to_chk = "that";
var cur_str= "that";
if(to_chk.localeCompare(cur_str) == 0){
alert("both are equal");
$("#0").attr("class","correct");
} else {
alert("both are not equal");
$("#0").attr("class","incorrect");
}
</script>
