StackGenVis: Alignment of Data, Algorithms, and Models for Stacking Ensemble Learning Using Performance Metrics
https://doi.org/10.1109/TVCG.2020.3030352
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49 lines
1.7 KiB
49 lines
1.7 KiB
4 years ago
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import identity from './identity';
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import { isArray, isObject } from './inspect';
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var RX_ARRAY_NOTATION = /\[(\d+)]/g;
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/**
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* Get property defined by dot/array notation in string.
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*
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* @link https://gist.github.com/jeneg/9767afdcca45601ea44930ea03e0febf#gistcomment-1935901
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*
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* @param {Object} obj
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* @param {string|Array} path
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* @param {*} defaultValue (optional)
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* @return {*}
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*/
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var get = function get(obj, path) {
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var defaultValue = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : null;
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// Handle array of path values
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path = isArray(path) ? path.join('.') : path; // If no path or no object passed
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if (!path || !isObject(obj)) {
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return defaultValue;
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} // Handle edge case where user has dot(s) in top-level item field key
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// See https://github.com/bootstrap-vue/bootstrap-vue/issues/2762
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// Switched to `in` operator vs `hasOwnProperty` to handle obj.prototype getters
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// https://github.com/bootstrap-vue/bootstrap-vue/issues/3463
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if (path in obj) {
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return obj[path];
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} // Handle string array notation (numeric indices only)
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path = String(path).replace(RX_ARRAY_NOTATION, '.$1');
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var steps = path.split('.').filter(identity); // Handle case where someone passes a string of only dots
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if (steps.length === 0) {
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return defaultValue;
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} // Traverse path in object to find result
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// We use `!=` vs `!==` to test for both `null` and `undefined`
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// Switched to `in` operator vs `hasOwnProperty` to handle obj.prototype getters
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// https://github.com/bootstrap-vue/bootstrap-vue/issues/3463
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return steps.every(function (step) {
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return isObject(obj) && step in obj && (obj = obj[step]) != null;
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}) ? obj : defaultValue;
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};
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export default get;
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