58 lines
1.5 KiB
JavaScript
58 lines
1.5 KiB
JavaScript
/**
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* @module ol/obj
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*/
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/**
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* Polyfill for Object.assign(). Assigns enumerable and own properties from
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* one or more source objects to a target object.
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* See https://developer.mozilla.org/en/docs/Web/JavaScript/Reference/Global_Objects/Object/assign.
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*
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* @param {!Object} target The target object.
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* @param {...Object} var_sources The source object(s).
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* @return {!Object} The modified target object.
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*/
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export const assign =
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typeof Object.assign === 'function'
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? Object.assign
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: function (target, var_sources) {
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if (target === undefined || target === null) {
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throw new TypeError('Cannot convert undefined or null to object');
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}
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const output = Object(target);
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for (let i = 1, ii = arguments.length; i < ii; ++i) {
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const source = arguments[i];
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if (source !== undefined && source !== null) {
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for (const key in source) {
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if (source.hasOwnProperty(key)) {
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output[key] = source[key];
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}
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}
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}
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}
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return output;
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};
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/**
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* Removes all properties from an object.
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* @param {Object} object The object to clear.
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*/
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export function clear(object) {
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for (const property in object) {
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delete object[property];
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}
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}
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/**
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* Determine if an object has any properties.
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* @param {Object} object The object to check.
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* @return {boolean} The object is empty.
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*/
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export function isEmpty(object) {
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let property;
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for (property in object) {
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return false;
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}
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return !property;
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}
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