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hoyangtsai/number.js

Created November 13, 2019 07:43
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check a char is number between 0 and 9
Raw
number.js
let charCode = String.prototype.charCodeAt.call(str, index)
// char code between 48 and 57 is the number 0 - 9
if ( charCode < 48 || charCode > 57) {
...
}
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