/** * Increase the value of a `number`. * * @param {number} number The number to increase. * @param {number} number Increase. * @return {number} Returns the decrease. * @example * * inc(4) * // => 5 * * inc(5, 3) * // => 8 * * inc(7.3) * // => 8.3 * */ export function inc(number: number, increase: number=1): number { return number + increase; } /** * Decrease the value of a `number`. * * @param {number} number - The number to decrease. * @param {number} number - Decrease. * @return {number} Returns the decrease. * @example * * dec(4) * // => 3 * * dec(5, 3) * // => 2 * * dec(7.3) * // => 6.3 * * dec("foo") * // => false */ export function dec(number: number, decrease: number=1): number { return number - decrease; } /** * Returns an array with a sequence. * * @param {number} start - Beginning of the range. * @param {number} stop - End of range. * @param {number} step - Interval between numbers. Default is 1. * @return {Array} Sequence. * @example * * range(4) * // => [0, 1, 2, 3, 4] * * range(2, 4) * // => [2, 3, 4] * * range(0, 9, 3) * // => [0, 3, 6, 9] */ export function range(start: number, stop: number | null=null, step: number=1): number[] { const startArray = stop === null ? 0 : start; const stopArray = stop === null ? start : stop; return Array.from({ length: (stopArray - startArray) / step + 1}, (_, i) => startArray + (i * step)); } /** * Returns a JSON with an updated value * @param {string} key * @param {string} newValue * @param {JSON} json * @return {JSON} * @example * * const person = {name: 'James', age: 20, pets: ['dog', 'cat']}; * updateJSON('name', 'maria', person); * // {"age": 20, "name": "maria", "pets": ["dog", "cat"]} * * Others: "modify" in Ramda */ export function updateJSON(key: string, newValue: any, json: JSON): JSON { // JSON to Array return Object.entries(json).map( function (row: any[]): any[] { // Replace value return row[0] == key ? row.slice(0, 1).concat(newValue) : row } ).reduce( function (jsonUpdate: any, valueUpdate: any): JSON { // Array to JSON jsonUpdate[valueUpdate[0]] = valueUpdate[1]; return jsonUpdate; }, {}); } /** * Creates a duplicate-free version of an array. * * @param {Array} array - The array to inspect. * @return {Array} - Returns the new duplicate free array. * @example * * uniqValuesArray([2, 1, 2, 2]) * // => [2, 1] */ export function uniqValuesArray(array: any[]): any[] { return Array.from(new Set(array)); } /** * Clone JSON. * * @param {JSON} json - Object. Default {}. * @return {JSON} New object. * @example * * cloneObject({"edad": 23}) * // => {"edad": 23} * * cloneObject() * // => {} * */ export function cloneJSON(json: JSON): JSON { return JSON.parse(JSON.stringify(json)); } /** * Return random number. * * @param {number} min - Minimum number. It is inclusive. * @param {number} max - Maximum number. It is inclusive. * @param {number} decimals - Number of decimals. Default 0. * @return {number} * @example * * getRandom(0, 4) * // => 3 (Maybe) * * getRandom(0, 10, 2) * // => 8.31 (Maybe) * */ export function getRandom(min, max, decimals=0) { const minRandom = Math.ceil(min); const maxRandom = Math.floor(max); return (Math.random() * (maxRandom - minRandom + 1) + minRandom).toFixed(decimals); } /** * Returns the index of an Array of Files from its name. If there are multiple files with the same name, the last one will be returned. * @param {string} name - Name file. * @param {Array} list - List of files. * @return number */ export function getIndexOfFileList(name: string, list: Array): number { return list.reduce( (position, file, index) => (file.name === name ? index : position), -1 ); } /** * Returns a copy of the array by removing one position by index. * @param {Array} list * @param {number} index * @return {Array} list */ export function deleteArrayElementByIndex(list: Array, index: number) { return list.filter((item, itemIndex) => itemIndex !== index); }