tessl/npm-lodash-size
Gets the size of collections by returning length for array-like values or the number of enumerable properties for objects.
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lodash.size
Gets the size of collections by returning the length for array-like values or the number of own enumerable properties for objects. This is a modularized build of lodash's _.size method, exported as a standalone Node.js module.
Package Information
- Package Name: lodash.size
- Package Type: npm
- Language: JavaScript
- Installation:
npm install lodash.size
Core Imports
var size = require('lodash.size');For modern environments supporting ES modules:
import size from 'lodash.size';Basic Usage
var size = require('lodash.size');
// Array size
size([1, 2, 3]);
// => 3
// Object size (number of own enumerable properties)
size({ 'a': 1, 'b': 2 });
// => 2
// String size
size('pebbles');
// => 7
// Null/undefined handling
size(null);
// => 0
size(undefined);
// => 0
// Empty values
size([]);
// => 0
size({});
// => 0
size('');
// => 0Capabilities
Size Calculation
Gets the size of a collection by returning its length for array-like values or the number of own enumerable properties for objects.
/**
* Gets the size of collection by returning its length for array-like
* values or the number of own enumerable properties for objects.
*
* @param {Array|Object|string} collection The collection to inspect.
* @returns {number} Returns the size of collection.
*/
function size(collection)Parameters:
collection(Array|Object|string): The collection to inspect
Returns:
- (number): The size of collection
Behavior:
- For arrays and array-like objects (with numeric
lengthproperty): returns thelengthvalue - For objects: returns the count of own enumerable properties (uses
lodash.keysinternally) - For strings: returns the string length
- For
nullorundefined: returns0 - For values with invalid length properties: falls back to counting object properties
Examples:
// Arrays
size([1, 2, 3, 4, 5]);
// => 5
// Array-like objects
size({ 0: 'a', 1: 'b', 2: 'c', length: 3 });
// => 3
// Plain objects
size({ foo: 'bar', baz: 'qux' });
// => 2
// Strings
size('hello world');
// => 11
// Edge cases
size(null); // => 0
size(undefined); // => 0
size([]); // => 0
size({}); // => 0
size(''); // => 0
// Objects with length property that isn't valid
size({ length: 'invalid', a: 1, b: 2 });
// => 2 (counts properties, ignores invalid length)- Workspace
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