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December 17, 2015 00:19
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Use of 'for ... of' in JavaScript
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let arr = [ 3, 5, 7 ]; | |
arr.foo = "hello"; | |
for (let i in arr) { | |
console.log(i); // logs "0", "1", "2", "foo" | |
} | |
for (let i of arr) { | |
console.log(i); // logs "3", "5", "7" | |
} |
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