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Barry Jones revised this gist
Sep 12, 2020 . 1 changed file with 206 additions and 93 deletions.There are no files selected for viewing
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters. Learn more about bidirectional Unicode charactersOriginal file line number Diff line number Diff line change @@ -1,97 +1,210 @@ /** * This module provides native variable type checking utilities. * It has no external dependencies. * No parsing or coercion is performed. * * @module TypeUtils */ const validateUUID = require ( 'uuid-validate' ); // The module definition const TypeUtils = { /** * Is the value a string? * @return {boolean} * @param value Any arbitrary value */ isString: value => typeof value === 'string', /** * Is the value a number? * @return {boolean} * @param value Any arbitrary value */ isNumber: value => { // BigInt's are not interchangeable with Math.Number if ( typeof value === 'bigint' ) { return false; } return !isNaN ( value ) && typeof value === 'number'; }, /** * Is the value an integer? * @return {boolean} * @param value Any arbitrary value */ isInteger: value => { return !TypeUtils.isInfinite ( value ) && TypeUtils.isNumber ( value ) && parseInt ( value, 10 ) === value ; }, /** * Is the value a floating point number? * @return {boolean} * @param value Any arbitrary value */ isFloat: value => { return ( '' + value ).includes ( '.' ) && parseFloat ( value ) === value && !TypeUtils.isInfinite ( value ) ; }, /** * Is the value equal to JavaScript's Infinity? * @return {boolean} * @param value Any arbitrary value */ isInfinite: value => value === Infinity, /** * Is the value a boolean? * @return {boolean} * @param value Any arbitrary value */ isBoolean: value => [ false, true ].includes ( value ), /** * Is the value an object? * @return {boolean} * @param value Any arbitrary value */ isObject: value => { return typeof value === 'object' && !TypeUtils.isArrayLike ( value ) && !TypeUtils.isNull ( value ) ; }, /** * Is the value an array? * @return {boolean} * @param value Any arbitrary value */ isArray: value => Array.isArray ( value ), /** * Is the value array-like (Array, Set or Map)? * @return {boolean} * @param value Any arbitrary value */ isArrayLike: value => value instanceof Set || value instanceof Map || Array.isArray ( value ), /** * Is the value a function? * @return {boolean} * @param value Any arbitrary value */ isFunction: value => typeof value === 'function', /** * Is the value equal to NULL? * @return {boolean} * @param value Any arbitrary value */ isNull: value => value === null, /** * Is the value equal to UNDEFINED? * @return {boolean} * @param value Any arbitrary value */ isUndefined: value => value === undefined, /** * Is the value either NULL or UNDEFINED * @return {boolean} * @param value Any arbitrary value */ isNullOrUndefined: value => [ null, undefined ].includes ( value ), /** * Is the value considered empty? * (Numbers, Booleans aren't ever considered "empty") * @return {boolean} * @param value Any arbitrary value */ isEmpty: value => { // Null / Undefined if ( TypeUtils.isNull ( value ) || TypeUtils.isUndefined ( value ) ) { return true; } // String if ( TypeUtils.isString ( value ) && value.length === 0 ) { return true; } // Arrays if ( TypeUtils.isArray ( value ) ) { return value.length === 0; } // Sets, Maps if ( TypeUtils.isArrayLike ( value ) ) { return value.size === 0; } // Objects if ( TypeUtils.isObject ( value ) && Object.keys ( value ).length === 0 ) { return true; } return false; }, /** * Is the value a Date? * @return {boolean} * @param value Any arbitrary value */ isDate: value => { return ( !TypeUtils.isNullOrUndefined ( value ) && value.constructor === Date && TypeUtils.isInteger ( value.getTime () ) ); }, /** * Is the value a Promise? * @return {boolean} * @param value Any arbitrary value */ isPromise: value => Boolean ( value && TypeUtils.isFunction ( value.then ) ), /** * Is the value a valid specific UUID version? * @return {boolean} * @param value * @param version */ isUUID: ( value, version = 4 ) => validateUUID ( value, version ), /** * Safe wrapper for checking if an object has a property * @return {boolean} * @param value * @param property */ hasProperty: ( value, property ) => { if ( !TypeUtils.isObject ( value ) ) { return false; } return Object.prototype.hasOwnProperty.call ( value, property ); } }; -
Jan 15, 2020 . 1 changed file with 20 additions and 2 deletions.There are no files selected for viewing
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters. Learn more about bidirectional Unicode charactersOriginal file line number Diff line number Diff line change @@ -2,21 +2,25 @@ * This module provides native variable type checking utilities * It has no external dependencies * Single-line functions used for conciseness * No parsing or coercion is performed */ const TypeUtils = { // Strings isString: value => typeof value === 'string', // Number isNumber: value => !isNaN ( value ) && typeof value === 'number', // Integer isInteger: value => parseInt ( value, 10 ) === value, // Float isFloat: value => ('' + value).includes ( '.' ) && parseFloat ( value ) === value, // Infinite isInfinite: value => value === Infinity, // Boolean isBoolean: value => [ false, true ].includes ( value ), @@ -72,7 +76,21 @@ const TypeUtils = { return false; }, // Date isDate: value => { return ( !TypeUtils.isNullOrUndefined ( value ) && value.constructor === Date && TypeUtils.isInteger ( value.getTime () ) ); }, // Promise isPromise: value => Boolean ( value && TypeUtils.isFunction ( value.then ) ) }; -
Jan 15, 2020 .There are no files selected for viewing
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters. Learn more about bidirectional Unicode charactersOriginal file line number Diff line number Diff line change @@ -0,0 +1,79 @@ /** * This module provides native variable type checking utilities * It has no external dependencies * Single-line functions used for conciseness */ const TypeUtils = { // Strings isString: value => typeof value === 'string', // Number isNumber: value => typeof value === 'number', // Integer isInteger: value => parseInt ( value, 10 ) === value, // Float isFloat: value => ('' + value).includes ( '.' ) && parseFloat ( value ) === value, // Boolean isBoolean: value => [ false, true ].includes ( value ), // Object isObject: value => typeof value === 'object' && !Array.isArray ( value ), // Array isArray: value => Array.isArray ( value ), // Array-like - Array, Set, Map isArrayLike: value => value instanceof Set || value instanceof Map || Array.isArray ( value ), // Function isFunction: value => typeof value === 'function', // Null isNull: value => value === null, // Undefined isUndefined: value => value === undefined, // Null or undefined isNullOrUndefined: value => [ null, undefined ].includes ( value ), // Empty // Numbers, Booleans aren't ever considered "empty" isEmpty: value => { // Null / Undefined if ( TypeUtils.isNull ( value ) || TypeUtils.isUndefined ( value ) ) { return true; } // String if ( TypeUtils.isString ( value ) && value.length === 0 ) { return true; } // Arrays if ( TypeUtils.isArray ( value ) ) { return value.length === 0; } // Sets, Maps if ( TypeUtils.isArrayLike ( value ) ) { return value.size === 0; } // Objects if ( TypeUtils.isObject ( value ) && Object.keys ( value ).length === 0 ) { return true; } return false; } }; module.exports = TypeUtils;
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