@rrainpath/ts-utils

Utility TypeScript functions & types. Contains: inRange, StringBuilder, isEmpty, nonEmpty

Install

npm i @rrain/ts-utils

Usage

inRange(minValue, maxValue, currentValue) makes currentValue to be in range [minValue, maxValue]

let a
let r
a = 50
r = inRange(0,100,a) // => 50
r = inRange(50,50,a) // => 50
r = inRange(70,100,a) // => 70
r = inRange(49,49.999,a) // => 49.999

isEmpty(object) checks if object is null or undefined

nonEmpty(object) checks if object !== null && !== undefined

StringBuilder let you easy way to modify string

let sb = new StringBuilder('some string')
let s = sb.replace(0,4,'awesome').replaceLen(8,1,'S').append("Builder").toString() // => awesome StringBuilder

StringBuilder methods:

set(str?: string | null | undefined): void equlas to new StringBuilder(str)

first(str: string): this insert to start

append(str: string): this

insert(idx: number, str: string): this

remove(s: number, e?: number): this

removeLen(s: number, len?: number): this

retain(s: number, e?: number): this

retainLen(s: number, len?: number): this

replace(s: number, e: number, str: string): this

replaceLen(s: number, len: number, str: string): this

charAt(idx: number): string

charCodeAt(idx: number): number | undefined

firstChar(): string

firstCharCode(): number | undefined

lastChar(): string

lastCharCode(): number | undefined

findFirst(char: string): number | undefined

findLast(char: string): number | undefined

clear(): void

len(): number

isEmpty(): boolean

toString(): string