js-length v1.0.22

length.js

safety length for every javascript program !

Why js-length ?

Actually the .length will be called in your program everywhere, also we see the fatal error in your log. perhaps, it will crash your program, the js-length will resolve all the length or size of javascript variable.

• Crash:

// Assuming that `some API()` gives a response value of null
const test = someAPI();

for(let i = 0; i < test.length; i++) {
  //logic code here
}

/* 
The for loop will cause an fatal error:

TypeError: Cannot read property 'length' of null

It's not safe here 
*/

• To avoid call the length of null

const length = require('js-length');
const values = someAPI();
for(let i = 0; i < length(values); i++) {
  // Logic code here
}

/* 
  It's never be crash
  At least length.js will return a number >= 0 
*/

Usage

• install

npm i --save js-length@latest

• require

const length = require('js-length');

• examples

length(null); // => 0
length(undefined); // => 0
length('abc'); // => 3
length([1,2,3]); // => 3

const map = new Map();
map.set(1, 1);
map.set(2, 2);
length(map); // => 2

const set = new Set([1, 2, 3]);
length(set) // => 3

/* fn.length for arguments length */
const fn = function(a, b, c) {}
/* we don't length the function arguments */
length(fn); // => 0

length({}); // => 0
length({'a': 1}); // => 0

LICENCE

MIT License

Copyright (c) 2018 Danielsss

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.