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