node package manager
We need your input. Help make JavaScript better: Take the 2017 JavaScript Ecosystem survey »

pad-left

pad-left NPM version NPM downloads Build Status

Left pad a string with zeros or a specified string. Fastest implementation.

You might also be interested in word-wrap.

Install

Install with npm:

$ npm install pad-left --save

Usage

var pad = require('pad-left');
pad(  '4', 4, '0') // 0004 
pad( '35', 4, '0') // 0035 
pad('459', 4, '0') // 0459 

Benchmarks

Benchmarks for node.js v6.1.0 versus left-pad.

# benchmark/fixtures/10-custom-char.js (37 bytes) 
  pad-left x 14,940,947 ops/sec ±0.81% (87 runs sampled)
  left-pad x 7,901,604 ops/sec ±1.17% (86 runs sampled)
 
# benchmark/fixtures/10.js (32 bytes) 
  pad-left x 13,305,123 ops/sec ±1.53% (84 runs sampled)
  left-pad x 6,979,536 ops/sec ±1.13% (84 runs sampled)
 
# benchmark/fixtures/100-custom-char.js (38 bytes) 
  pad-left x 14,227,637 ops/sec ±1.41% (81 runs sampled)
  left-pad x 1,352,240 ops/sec ±1.51% (86 runs sampled)
 
# benchmark/fixtures/100.js (34 bytes) 
  pad-left x 15,664,561 ops/sec ±0.99% (83 runs sampled)
  left-pad x 1,247,316 ops/sec ±0.96% (87 runs sampled)
 
# benchmark/fixtures/1000-custom-char.js (40 bytes) 
  pad-left x 15,210,294 ops/sec ±1.15% (87 runs sampled)
  left-pad x 159,958 ops/sec ±1.01% (88 runs sampled)
 
# benchmark/fixtures/1000.js (35 bytes) 
  pad-left x 14,157,425 ops/sec ±1.10% (88 runs sampled)
  left-pad x 143,805 ops/sec ±1.08% (87 runs sampled)

Benchmarks for node.js v6.1.0 versus stevemao/left-pad.

# benchmark/fixtures/10-custom-char.js (37 bytes) 
  pad-left x 13,251,037 ops/sec ±1.40% (84 runs sampled)
  left-pad x 10,745,530 ops/sec ±1.18% (86 runs sampled)
 
# benchmark/fixtures/10.js (32 bytes) 
  pad-left x 13,644,357 ops/sec ±1.33% (87 runs sampled)
  left-pad x 20,107,245 ops/sec ±1.00% (88 runs sampled)
 
# benchmark/fixtures/100-custom-char.js (38 bytes) 
  pad-left x 15,650,330 ops/sec ±1.01% (86 runs sampled)
  left-pad x 9,706,877 ops/sec ±1.13% (87 runs sampled)
 
# benchmark/fixtures/1000-custom-char.js (40 bytes) 
  pad-left x 17,255,593 ops/sec ±0.99% (88 runs sampled)
  left-pad x 6,312,637 ops/sec ±1.16% (87 runs sampled)
 
# benchmark/fixtures/1000.js (35 bytes) 
  pad-left x 15,679,410 ops/sec ±0.99% (90 runs sampled)
  left-pad x 6,439,580 ops/sec ±1.08% (86 runs sampled)

Related projects

You might also be interested in these projects:

Contributing

Pull requests and stars are always welcome. For bugs and feature requests, please create an issue.

Building docs

Generate readme and API documentation with verb:

$ npm install verb && npm run docs

Or, if verb is installed globally:

$ verb

Running tests

Install dev dependencies:

$ npm install -d && npm test

Author

Jon Schlinkert

License

Copyright © 2016, Jon Schlinkert. Released under the MIT license.


This file was generated by verb, v0.9.0, on May 07, 2016.