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jdfm/leftPad.js

Last active September 5, 2016 01:59
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ES6 Exploration: leftPad for natural numbers
Raw
leftPad.js
const leftPad = (
( input=0, minOutputLength=0 ) =>
String( input ).replace( /^(\d+)$/, ( match, $1='' ) =>
'0'.repeat( Math.max( minOutputLength - $1.length, 0 ) ) + $1
)
)
console.log(leftPad(10000, 10))
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