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79 lines
1.1 KiB
JavaScript
79 lines
1.1 KiB
JavaScript
export function parse_option(value, default_value){
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return typeof value !== "undefined" ? 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 = new 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 = new 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 typeof val === "string";
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}
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export function is_object(val){
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return typeof val === "object";
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}
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export function is_function(val){
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return typeof val === "function";
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}
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