50 lines
1 KiB
JavaScript
50 lines
1 KiB
JavaScript
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const isObject = x => x !== null && typeof x === 'object';
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const getKeys = object => {
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if (!isObject(object)) {
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return [''];
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}
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let result = [];
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Object.keys(object).forEach(key => {
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getKeys(object[key]).forEach(subKey => {
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result.push(subKey ? `${key}.${subKey}` : key);
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});
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});
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return result;
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};
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const getValue = (obj, path) => {
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let [value, i, paths] = [obj, 0, path.split('.')];
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for (i = 0; i < paths.length && isObject(value); ++i) {
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value = value[paths[i]];
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}
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if (i < paths.length || value === undefined || isObject(value)) {
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return '';
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}
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return value;
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};
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/**
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* @param {Array} arr
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* @return {Matrix}
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*/
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const jsonToMatrix = function(arr) {
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let keySet = arr.reduce((keys, key) => {
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getKeys(key).forEach(k => keys.add(k));
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return keys;
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}, new Set());
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let keys = Array.from(keySet).sort();
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let matrix = [keys];
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arr.forEach(obj => {
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matrix.push(keys.map(key => getValue(obj, key)));
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});
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return matrix;
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};
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