How can I check for an empty/undefined/null string in, For checking if a variable is falsey or if it has length attribute equal to zero (which for a string, means it is empty), I use:. function isEmpty(str) { return (!str || str.length === 0 ); } (Note that strings aren'...
*@categoryLang*@param{*} value The value to check. *@returns{boolean} Returns `true` if `value` is empty, else `false`. *@example* * _.isEmpty(null); * // => true * * _.isEmpty(true); * // => true * * _.isEmpty(1); * // => true * * _.isEmpty([1, 2, 3])...
* Check if the cache value from the local storage is still valid * A valid cache value is when: * - Not null or empty string * - Not an empty array * - Not expired * @param {String} localStorageKey The key in the browser local storage * @return {String} The cache value if vali...
Ensured _.isEqual works with values from Object.create(null) & _(false) Ensured _.min & _.max work as callbacks for _.map Ensured _.template coerces the text param to a string Optimized _.difference, _.omit, & _.without by way of baseDifference Optimized _.isBoolean, _.isNumber...
Looking for Lodash modules written in ES6 or smaller bundle sizes? Check out lodash-es. Why Lodash? Lodash makes JavaScript easier by taking the hassle out of working with arrays, numbers, objects, strings, etc. Lodash’s modular methods are great for: Iterating arrays, objects, & strings ...
* Checks if `value` is classified as a `Symbol` primitive or object. * * @since 4.0.0 * @category Lang * @param {*} value The value to check. * @returns {boolean} Returns `true` if `value` is a symbol, else `false`.
提交取消 提示:由于 Git 不支持空文件夾,创建文件夹后会生成空的 .keep 文件 .github .internal test .editorconfig .eslintrc.js .gitattributes .gitignore CHANGELOG LICENSE README.md SECURITY.md add.js after.js at.js attempt.js before.js
Truthyandfalsyvalues are very important when using lodash predicates.false,0,""(empty string),null,undefinedandNaNare falsy values in JavaScript. All other values are truthy values. 2.2SameValueZero SameValueZerois the algorithm of how to compare two values in lodash. It’s similar to JavaScript...
* @returns {*} Returns the property value.*/functiongetValue(object, key) {returnobject ==null?undefined : object[key]; }/** * Checks if `value` is a host object in IE < 9. * * @private * @param {*} value The value to check. ...
<RawHTML>{shortCode}</RawHTML> : null; }Example #13Source File: reducerInjectors.js From QiskitFlow with Apache License 2.0 6 votes export function injectReducerFactory(store, isValid) { return function injectReducer(key, reducer) { if (!isValid) checkStore(store); invariant( isString(key...