@deck.gl/core
Version:
deck.gl core library
51 lines • 1.38 kB
JavaScript
// deck.gl
// SPDX-License-Identifier: MIT
// Copyright (c) vis.gl contributors
/**
* Fast partial deep equal for prop.
*
* @param a Prop
* @param b Prop to compare against `a`
* @param depth Depth to which to recurse in nested Objects/Arrays. Use 0 (default) for shallow comparison, -1 for infinite depth
*/
/* eslint-disable complexity */
export function deepEqual(a, b, depth) {
if (a === b) {
return true;
}
if (!depth || !a || !b) {
return false;
}
if (Array.isArray(a)) {
if (!Array.isArray(b) || a.length !== b.length) {
return false;
}
for (let i = 0; i < a.length; i++) {
if (!deepEqual(a[i], b[i], depth - 1)) {
return false;
}
}
return true;
}
if (Array.isArray(b)) {
return false;
}
if (typeof a === 'object' && typeof b === 'object') {
const aKeys = Object.keys(a);
const bKeys = Object.keys(b);
if (aKeys.length !== bKeys.length) {
return false;
}
for (const key of aKeys) {
if (!b.hasOwnProperty(key)) {
return false;
}
if (!deepEqual(a[key], b[key], depth - 1)) {
return false;
}
}
return true;
}
return false;
}
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