@javelin/core
Version:
This package is a general catch-all for stuff shared by many Javelin packages, including:
69 lines • 2 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.unpackSparseArray = exports.packSparseArray = exports.createArray = exports.mutableEmpty = exports.mutableRemove = exports.mutableRemoveByIndexUnordered = exports.mutableRemoveUnordered = void 0;
const fp_1 = require("./fp");
function mutableRemoveUnordered(arr, element) {
const length = arr.length;
const index = arr.indexOf(element);
if (index === -1) {
return false;
}
const last = arr.pop();
if (index < length - 1) {
arr[index] = last;
}
return true;
}
exports.mutableRemoveUnordered = mutableRemoveUnordered;
function mutableRemoveByIndexUnordered(arr, index) {
const length = arr.length;
if (index === -1) {
return false;
}
const last = arr.pop();
if (index < length - 1) {
arr[index] = last;
}
return true;
}
exports.mutableRemoveByIndexUnordered = mutableRemoveByIndexUnordered;
function mutableRemove(arr, element) {
const index = arr.indexOf(element);
if (index === -1) {
return false;
}
arr.splice(index, 1);
return true;
}
exports.mutableRemove = mutableRemove;
function mutableEmpty(arr) {
while (arr.length > 0)
arr.pop();
return arr;
}
exports.mutableEmpty = mutableEmpty;
function createArray(len = 0, f = fp_1.noop) {
return Array(len)
.fill(undefined)
.map((_, i) => f(i));
}
exports.createArray = createArray;
function packSparseArray(array) {
return array.reduce((a, x, i) => {
a[i] = x;
return a;
}, {});
}
exports.packSparseArray = packSparseArray;
function unpackSparseArray(packedSparseArray) {
const sparseArray = [];
for (const index in packedSparseArray) {
const i = parseInt(index, 10);
if (!isNaN(i)) {
sparseArray[i] = packedSparseArray[index];
}
}
return sparseArray;
}
exports.unpackSparseArray = unpackSparseArray;
//# sourceMappingURL=array.js.map