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isEmpty.ts
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isEmpty.ts
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/*
* Copyright 2019 LABOR.digital
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* Last modified: 2019.01.23 at 17:52
*/
import {getListSize} from '../Lists/listAccess';
import {isNullOrUndef} from './isNullOrUndef';
/**
* Returns true if the given value counts as empty
* Empty values are: NULL, undefined, 0, "", " ", {}, [] and empty Maps and Sets
* @param value
* @param includeZero By default zero (0) is not seen as "empty" if you set this to true, it will be, tho
*/
export function isEmpty(value: any, includeZero?: boolean): boolean
{
if (isNullOrUndef(value)) {
return true;
}
switch (typeof value) {
case 'string':
return value.trim().length === 0 || includeZero === true && value === '0';
case 'number':
return includeZero === true ? value === 0 : false;
case 'object':
return getListSize(value) === 0;
}
return false;
}