litedash

litedash is a light weight version of some most commonly used functions from lodash

Installation

yarn add litedash

Usage

import {isUndefined, get, mapValues} from "litedash";

Functions

Type checks

• isNull(val): returns true if val is null
• isUndefined(val): returns true if val is undefined
• isNullOrUndefined(val): returns true if val is null or undefined
• isFunction(val): returns true if val is a function
• isString(val): returns true if val is a string
• isValidString(val): returns true if val is a non-empty string
• isObjectLike(val): returns true if val is not null and is of type object
• isObject(val): returns true if val is object-like or is a function
• isPlainObject(val): returns true if val is an object created by the Object constructor or one with a [[Prototype]] of null.

JSON

• get(object, path, defaultValue): returns value from object at path. If the value at path is found to be undefined, the defaultValue(is any) is returned
• set(object, path, value, options): Sets value in object in the path specified. If options.create is true, all objects along the path will be created

String

• capitalize(str): Capitalizes str i.e. makes the first letter capital
• getStringHash(str): Returns a number hash for str
• getJSONHash(json): Returns a number hash for the json object

Object

• mapValues(object, func): Creates an object with the same keys as object and values generated by running each of it's properies through func. func is invoked with 2 arguments value and key.
• filterObject(object, func): Returns a new object with keys and corresponding values from object, for every key/value that returns true when func is invoked with that value and key as arguments.

Function

• debounce(func, wait): Creates a debounced function that delays invoking func until after wait milliseconds have elapsed since the last time the debounced function was invoked.
• throttle(func, wait, options): Creates a throttled function that only invokes func at most once per wait milliseconds. Provide options.leading and options.trailing to indicate whether func should be invoked on the leading and/or trailing edge of the wait timeout. The func is invoked with the last arguments provided to the throttled function. Subsequent calls to the throttled function return the result of the last func invocation. If options.leading and options.trailing options are both true, func is invoked on the trailing edge of the timeout only if the throttled function is invoked more than once during the wait timeout. If wait is 0 and options.leading is false, func invocation is deferred until to the next tick, similar to setTimeout with a timeout of 0.
• bindFunctions(funcMap, bindBefore, bindAfter): Creates an object with the same keys as funcMap whose values are obtained by binding the corresponding functions with values from the arrays bindBefore and bindAfter. If any of the functions from the resultant map is called with say arg1 and arg2, the function's arguments object will be have the value [...bindBefore, arg1, arg2, ...bindAfter]
• pipeline(funcArray, initialState): Returns a function that invokes every function in an array of functions starting with the first one, passing results of the previous invocation to the next function in the array.

Promise

• resolvePromises(promises): If provided with an array of promises, it returns a promise that resolves when all the promises in the array has resolved. The returned promise will resolve with an array of results with the result in index i corresponding to promise i in the input array. If provided with a map of promises, it returns a promise that resolves when all the promises in the object has resolved. The returned promise will resolve with a map of results with the result in key i corresponding to promise at the key i in the input object. If anything else is provided, the input value is returned as such.