44 lines
1.2 KiB
JavaScript
44 lines
1.2 KiB
JavaScript
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/**
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* Returns a JSON with an updated value
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* @param {string} key
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* @param {string} newValue
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* @param {JSON} json
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* @return {JSON}
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*
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* Example
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* const person = {name: 'James', age: 20, pets: ['dog', 'cat']};
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* updateJSON('name', 'maria', person);
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* // {"age": 20, "name": "maria", "pets": ["dog", "cat"]}
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*
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* Others: "modify" in Ramda
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*/
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function updateJSON(key, newValue, json) {
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// JSON to Array
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return Object.entries(json).map(
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function (row) {
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// Replace value
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return row[0] == key ? row.slice(0, 1).concat(newValue) : row
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}
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).reduce(
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function (jsonUpdate, valueUpdate) {
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// Array to JSON
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jsonUpdate[valueUpdate[0]] = valueUpdate[1];
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return jsonUpdate;
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}, {});
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}
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/**
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* Returns an array with a sequence.
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*
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* @param {number} start Beginning of the range.
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* @param {number} stop End of range.
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* @param {number} step Interval between numbers. Default is 1.
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* @return {array}
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*/
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function range(start, stop=undefined, step=1) {
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const startArray = stop === undefined ? 0 : start;
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const stopArray = stop === undefined ? start : stop;
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return Array.from({ length: (stopArray - startArray) / step + 1}, (_, i) => startArray + (i * step));
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}
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