@orbit/utils
Version:
Core utilities for Orbit.
78 lines • 8.65 kB
JavaScript
;
/* eslint-disable @typescript-eslint/explicit-module-boundary-types, eqeqeq, no-eq-null, valid-jsdoc */
Object.defineProperty(exports, "__esModule", { value: true });
exports.eq = void 0;
/**
* `eq` checks the equality of two objects.
*
* The properties belonging to objects (but not their prototypes) will be
* traversed deeply and compared.
*
* Includes special handling for strings, numbers, dates, booleans, regexes, and
* arrays
*/
function eq(a, b) {
// Some elements of this function come from underscore
// (c) 2009-2013 Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
//
// https://github.com/jashkenas/underscore/blob/master/underscore.js
// Identical objects are equal. `0 === -0`, but they aren't identical.
// See the [Harmony `egal` proposal](http://wiki.ecmascript.org/doku.php?id=harmony:egal).
if (a === b) {
return a !== 0 || 1 / a == 1 / b;
}
// A strict comparison is necessary because `null == undefined`.
if (a == null || b == null) {
return a === b;
}
let type = Object.prototype.toString.call(a);
if (type !== Object.prototype.toString.call(b)) {
return false;
}
switch (type) {
case '[object String]':
return a == String(b);
case '[object Number]':
// `NaN`s are equivalent, but non-reflexive. An `egal` comparison is performed for
// other numeric values.
return a != +a ? b != +b : a == 0 ? 1 / a == 1 / b : a == +b;
case '[object Date]':
case '[object Boolean]':
// Coerce dates and booleans to numeric primitive values. Dates are compared by their
// millisecond representations. Note that invalid dates with millisecond representations
// of `NaN` are not equivalent.
return +a == +b;
// RegExps are compared by their source patterns and flags.
case '[object RegExp]':
return (a.source == b.source &&
a.global == b.global &&
a.multiline == b.multiline &&
a.ignoreCase == b.ignoreCase);
}
if (typeof a != 'object' || typeof b != 'object') {
return false;
}
if (type === '[object Array]') {
if (a.length !== b.length) {
return false;
}
}
let i;
for (i in b) {
if (b.hasOwnProperty(i)) {
if (!eq(a[i], b[i])) {
return false;
}
}
}
for (i in a) {
if (a.hasOwnProperty(i)) {
if (!eq(a[i], b[i])) {
return false;
}
}
}
return true;
}
exports.eq = eq;
//# sourceMappingURL=data:application/json;base64,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