看似相同的字符串比较失败 [英] Seemingly identical strings fail comparison

问题描述

比较两个字符串时遇到一个奇怪的问题.这是我的代码:

I am encountering a strange issue while comparing two strings. Here is my code:

console.log(x == y);
console.log("'" + x + "'=='" + y + "'");
console.log(typeof(x));
console.log(typeof(y));

在控制台中，我有:

false 
'1Ä4±'=='1Ä4±' 
string
string

我猜我的字符串包含奇怪的字符，那么我应该如何比较它们呢?我阅读了比较unicode字符时Javascript字符串比较失败，但在我的情况下是 x 和 y 来自同一来源，并且具有相同的编码.

I guess my strings contain strange characters, so how should I compare them? I read Javascript string comparison fails when comparing unicode characters but in my case, x and y come from the same source and have the same encoding.

推荐答案

您字符串中的Ä可以表示为单个UNICODE字符(拉丁文大写字母A(U + 0041)后跟组合透析(U + 0308)变音符号.

The Ä in your strings can be represented either as a single UNICODE character (Latin Capital Letter A With Diaeresis, U+00C4), or as a composite character consisting of Latin Capital Letter A (U+0041) followed by a Combining Diaeresis (U+0308) diacritic.

也可能有任意数量的零宽度空格(U +200B)，以及字符串中的其他不可见"字符.

There also might be any number of Zero-Width Spaces (U+200B), as well as other "invisible" characters in your strings.

因此，两个字符串可能呈现相同，但实际上是不同的.

Therefore, both strings may render the same, but actually be different.

这篇关于看似相同的字符串比较失败的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！