ckeditor5-image-upload-base64
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The development environment of CKEditor 5 – the best browser-based rich text editor.
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JavaScript
/**
* @license Copyright (c) 2003-2020, CKSource - Frederico Knabben. All rights reserved.
* For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license
*/
/**
* @module utils/comparearrays
*/
/**
* Compares how given arrays relate to each other. One array can be: same as another array, prefix of another array
* or completely different. If arrays are different, first index at which they differ is returned. Otherwise,
* a flag specifying the relation is returned. Flags are negative numbers, so whenever a number >= 0 is returned
* it means that arrays differ.
*
* compareArrays( [ 0, 2 ], [ 0, 2 ] ); // 'same'
* compareArrays( [ 0, 2 ], [ 0, 2, 1 ] ); // 'prefix'
* compareArrays( [ 0, 2 ], [ 0 ] ); // 'extension'
* compareArrays( [ 0, 2 ], [ 1, 2 ] ); // 0
* compareArrays( [ 0, 2 ], [ 0, 1 ] ); // 1
*
* @param {Array} a Array that is compared.
* @param {Array} b Array to compare with.
* @returns {module:utils/comparearrays~ArrayRelation} How array `a` is related to `b`.
*/
export default function compareArrays( a, b ) {
const minLen = Math.min( a.length, b.length );
for ( let i = 0; i < minLen; i++ ) {
if ( a[ i ] != b[ i ] ) {
// The arrays are different.
return i;
}
}
// Both arrays were same at all points.
if ( a.length == b.length ) {
// If their length is also same, they are the same.
return 'same';
} else if ( a.length < b.length ) {
// Compared array is shorter so it is a prefix of the other array.
return 'prefix';
} else {
// Compared array is longer so it is an extension of the other array.
return 'extension';
}
}
/**
* @typedef {'extension'|'same'|'prefix'} module:utils/comparearrays~ArrayRelation
*/