78 lines
1.1 KiB
JavaScript
78 lines
1.1 KiB
JavaScript
export function parse_option(value, default_value) {
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return "undefined" != typeof value ? value : default_value;
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}
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/**
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* @param {!number} count
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* @returns {Array<Object>}
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*/
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export function create_object_array(count) {
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const array = Array(count);
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for (let i = 0; i < count; i++) {
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array[i] = create_object();
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}
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return array;
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}
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export function create_arrays(count) {
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const array = Array(count);
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for (let i = 0; i < count; i++) {
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array[i] = [];
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}
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return array;
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}
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/**
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* @param {!Object} obj
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* @returns {Array<string>}
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*/
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export function get_keys(obj) {
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return Object.keys(obj);
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}
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export function create_object() {
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return Object.create(null);
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}
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export function concat(arrays) {
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return [].concat.apply([], arrays);
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}
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export function sort_by_length_down(a, b) {
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return b.length - a.length;
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}
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export function is_array(val) {
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return val.constructor === Array;
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}
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export function is_string(val) {
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return "string" == typeof val;
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}
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export function is_object(val) {
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return "object" == typeof val;
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}
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export function is_function(val) {
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return "function" == typeof val;
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} |