rc-js-util/bin/cjs/array/impl/array-push-unique.js

A collection of TS and C++ utilities to help writing performant and correct applications, achieved through strict typing and (removable) invariant checking.

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.arrayPushUnique = void 0;
const fp_identity_js_1 = require("../../fp/impl/fp-identity.js");
/**
 * @public
 * Like `Array.push` but checks if the value is unique first.
 *
 * @returns true if an element was pushed.
 *
 * @remarks
 * See {@link arrayPushUnique}.
 */
function arrayPushUnique(items, itemToPush, getComparisonValue = fp_identity_js_1.fpIdentity) {
    const comparisonValue = getComparisonValue(itemToPush);
    for (let i = 0, iEnd = items.length; i < iEnd; ++i) {
        if (getComparisonValue(items[i]) === comparisonValue) {
            return false;
        }
    }
    items.push(itemToPush);
    return true;
}
exports.arrayPushUnique = arrayPushUnique;
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