EN
JavaScript - reverse string (English letters)
4 points
In this short article, we would like to show you how reverse strings using JavaScript.
In practice string reversion problem is very comples when we work on emojis, surrogate characters, Asian characters, etc. Some solutions for that kind of strings reversion was shown in this article.
In the below you can find different solutions.
xxxxxxxxxx1
function reverseString(text) {2
var characters = text.split('');3
var reversion = characters.reverse();4
return reversion.join('');5
}6
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// Usage example:9
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var text = 'ABC';11
var reversion = reverseString(text);12
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console.log(reversion); // CBAWarning: this solutuion doesn't work with all emojis and Asian characters.
Output:
xxxxxxxxxx1
CBAThis solution should be used when we work on more comples unicode characters like emoji.
xxxxxxxxxx1
function reverseString(text) {2
let result = '';3
for (const character of text) {4
result = character + result;5
}6
return result;7
}8
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// Usage example:11
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var text = 'Hi there ! 💻🙂😀😋';13
var reversion = reverseString(text);14
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console.log(text); // Hi there ! 💻🙂😀😋16
console.log(reversion); // 😋😀🙂💻 ! ereht iHWarnings:
- this solution works under ES6+,
- this solutuion doesn't work with all emojis and Asian characters.
xxxxxxxxxx1
function reverseString(text) {2
var result = '';3
for(var i = text.length - 1; i > -1; --i) {4
result += text[i];5
}6
return result;7
}8
9
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// Usage example:11
12
var text = 'ABC';13
var reversion = reverseString(text);14
15
console.log(reversion); // CBAWarning: this solutuion doesn't work with all emojis and Asian characters.
xxxxxxxxxx1
if (String.prototype.reverse == null) {2
String.prototype.reverse = function() {3
var result = '';4
for (var i = this.length - 1; i > -1; --i) {5
result += this[i];6
}7
return result;8
}9
}10
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// Usage example:13
14
var text = 'ABC';15
var reversion = text.reverse();16
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console.log(reversion); // CBANote: in this case
Stringobject is extended of new reverse method.
Warning: this solutuion doesn't work with all emojis and Asian characters.
Output:
xxxxxxxxxx1
CBA