How to use the isRegExp function from lodash
Find comprehensive JavaScript lodash.isRegExp code examples handpicked from public code repositorys.
lodash.isRegExp is a function provided by the Lodash library that checks whether a given value is a regular expression object in JavaScript.
3374 3375 3376 3377 3378 3379 3380 3381 3382 3383* @category Objects * @param {*} value The value to check. * @returns {boolean} Returns `true` if the `value` is a regular expression, else `false`. * @example * * _.isRegExp(/fred/); * // => true */ function isRegExp(value) { return value && typeof value == 'object' && toString.call(value) == regexpClass || false;
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213 214 215 216 217 218 219 220 221 222module.exports.isObject = _.isObject; module.exports.isObjectLike = _.isObjectLike; module.exports.isOdd = _.isOdd; module.exports.isPlainObject = _.isPlainObject; module.exports.isPositive = _.isPositive; module.exports.isRegExp = _.isRegExp; module.exports.isSafeInteger = _.isSafeInteger; module.exports.isSequential = _.isSequential; module.exports.isSet = _.isSet; module.exports.isString = _.isString;
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How does lodash.isRegExp work?
lodash.isRegExp works by examining a given value and determining whether it is a regular expression object in JavaScript.
When called, lodash.isRegExp takes a single argument, which is the value to be checked. The function then checks whether the [[Class]] internal property of the value is equal to "[object RegExp]", which is the value returned by Object.prototype.toString.call() when called on a regular expression object.
If the value's [[Class]] property is equal to "[object RegExp]", then lodash.isRegExp returns true. Otherwise, it returns false.
Regular expression objects in JavaScript are used to represent patterns of characters in strings, and can be created using the RegExp constructor or using regular expression literal notation. By using lodash.isRegExp, JavaScript developers can programmatically identify and manipulate regular expression objects in their code, allowing for more powerful and flexible data processing and analysis.
GitHub: mdmarufsarker/lodash
473 474 475 476 477 478 479 480 481 482 483 484 485console.log(isObjectLike); // => true const isPlainObject = _.isPlainObject({}); console.log(isPlainObject); // => true const isRegExp = _.isRegExp(/abc/); console.log(isRegExp); // => true const isSafeInteger = _.isSafeInteger(1); console.log(isSafeInteger); // => true
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204 205 206 207 208 209 210 211 212 213false: (arg) => arg === false, true: (arg) => arg === true, function: (arg) => _.isFunction(arg), object: (arg) => _.isObject(arg), array: (arg) => _.isArray(arg), regexp: (arg) => _.isRegExp(arg), primitive: (arg) => isPrimitive(arg), jsonable: (arg) => isJsonable(arg), jsonableObject: (arg) => isJsonableObject(arg), defined: (arg) => !_.isUndefined(arg),
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Ai Example
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15const _ = require("lodash"); // create a regular expression object using the RegExp constructor const regExp1 = new RegExp("\\d+"); // create a regular expression object using literal notation const regExp2 = /\w+/; // create a non-regular-expression object const notRegExp = { pattern: "\\d+" }; // check whether each value is a regular expression using lodash.isRegExp console.log(`Is regExp1 a regular expression? ${_.isRegExp(regExp1)}`); console.log(`Is regExp2 a regular expression? ${_.isRegExp(regExp2)}`); console.log(`Is notRegExp a regular expression? ${_.isRegExp(notRegExp)}`);
In this example, we're using lodash.isRegExp to check whether a given value is a regular expression object in JavaScript. We first create two regular expression objects: regExp1, created using the RegExp constructor with the pattern "\d+", and regExp2, created using regular expression literal notation with the pattern "\w+". We then create a non-regular-expression object called notRegExp, which has a pattern property but is not a regular expression object. We use lodash.isRegExp to check whether each of these values is a regular expression, logging the results to the console. When we run this code, it will output the following messages to the console: vbnet Copy code
315 316 317 318 319 320 321 322 323 324function: (arg) => _.isFunction(arg), object: (arg) => _.isObject(arg), // object: <T>(arg: T): arg is T & object => _.isObject(arg), array: (arg) => _.isArray(arg), regexp: (arg) => _.isRegExp(arg), // regexp: <T>(arg: T): arg is T & RegExp => _.isRegExp(arg), itself: (arg) => true, primitive: (arg) => isPrimitive(arg), jsonable: (arg) => isJsonable(arg), jsonableObject: (arg) => isJsonableObject(arg),
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