41 lines
1.2 KiB
JavaScript
41 lines
1.2 KiB
JavaScript
class Utils {
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// adapted from https://www.w3resource.com/javascript-exercises/fundamental/javascript-fundamental-exercise-88.php
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static median(arr) {
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const mid = Math.floor(arr.length / 2);
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const nums = [...arr].sort((a, b) => a - b);
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return arr.length % 2 !== 0 ? nums[mid] : (nums[mid - 1] + nums[mid]) / 2;
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}
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static sum(numbers) {
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return numbers.reduce((a, b) => a + b, 0);
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}
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static getKeysAlignedWithValues(dict) {
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const keys = [];
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const values = [];
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for (const [key, value] of Object.entries(dict)) {
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keys.push(key);
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values.push(value);
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}
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return { 'keys': keys, 'values': values };
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}
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static sliceDict(dict, start, end) {
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return Object.fromEntries(Object.entries(dict).slice(start, end));
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}
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static convertDict2CSV(dict) {
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const {'keys': columns, 'values': firstRow} = Utils.getKeysAlignedWithValues(dict);
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return `${Utils.#quoteValues(columns)}\n${firstRow}`;
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}
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static #quoteValues(values) {
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return values.map(Utils.#quoteValue);
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}
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static #quoteValue(value) {
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return '"' + value + '"';
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}
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}
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