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akhilome/js_string_fromCharCode.js

Last active May 31, 2021 13:13
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js_string_fromCharCode.js
// ABC...Z
const alphaUpper = Array(26)
.fill('')
.map((_, i) => String.fromCharCode(65 + i))
.join('');
// abc...z
const alphaUpper = Array(26)
.fill('')
.map((_, i) => String.fromCharCode(65 + i))
.join('');
// 012...9
const num = Array(10)
.fill('')
.map((_, i) => String.fromCharCode(48 + i))
.join('');
// CharCodes
// 65 -> A, 90 -> Z
// 97 -> a, 122 -> z
// 48 -> 0, 57 -> 9
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