Simple lightweight string operation library for Typescript.

Installation

npm install typescript-string-operations

No jQuery required! Unit tested, works with Angular.

 import { StringBuilder, emptyString, joinString, formatString, isNullOrWhiteSpace } from 'typescript-string-operations';

When migrating from Version 1.4.1 or lower, you can also import the class String. Using this String class would override the native String object from JavaScript. We will remove this declaration with the next major release

 import { String } from 'typescript-string-operations';

USAGE:

String.empty

var id = emptyString; // or String.empty
// output: id = '';

String.isNullOrWhiteSpace():

var id = image.GetId();
if(isNullOrWhiteSpace(id)) // String.isNullOrWhiteSpace(id)
	return image;

String.format():

var id = image.GetId()
formatString("image_{0}.jpg", id) // or String.format()
output: "image_2db5da20-1c5d-4f1a-8fd4-b41e34c8c5b5.jpg";

Specifier available!

var value = formatString("{0:L}", "APPLE"); //output "apple"

value = formatString("{0:U}", "apple"); // output "APPLE"

value = formatString("{0:d}", "2017-01-23 00:00"); //output "23.01.2017"

value = formatString("{0:s}", "21.03.2017 22:15:01") //output "2017-03-21T22:15:01"

value = formatString("{0:n}", 1000000);
//output "1.000.000"

value = formatString("{0:00}", 1);
//output "01"

UPDATE

String.format for Objects including specifiers

var fruit = new Fruit();
fruit.type = "apple";
fruit.color = "RED";
fruit.shippingDate = new Date(2018, 1, 1);
fruit.amount = 10000;

format("the {type:U} is {color:L} shipped on {shippingDate:s} with an amount of {amount:n}", fruit);
// output: the APPLE is red shipped on 2018-01-01 with an amount of 10.000

Specifier	Result
L	LowerCase
U	UpperCase
d	ShortDatePattern
s	SortableDateTimePattern
n	Thousand seperator
00	Padding numbers

String.join():

var value = joinString("; ", "Apple", "Banana"); // or String.join()
//output: "Apple; Banana";

OR

 let object = { Name: "Foo", Value: "Bar" };
 var value = joinString('.', object);
//output: "Foo.Bar";

var array = ['Apple', 'Banana']
var value = joinString("; ", array);
//output: "Apple; Banana";

Methods

Method	Type	Description	Parameter
empty	Property	simply returns "".
isNullOrWhiteSpace	Method	returns true value if given parameter is either null, empty or undefined.	format, ...args
format/formatString	Method	Converts the value of objects to strings based on the formats specified and inserts them into another string.	format, ...args
join/joinString	Method	Combines arguments delimited by given seperator.	delimiter,...args
join/joinString	Method	Combines arguments delimited by given seperator from array.	delimiter,array

StringBuilder

Just like you know from C#,

var favoriteFruit: string = this.fruitService.getFavorite(); //Blueberries

var builder = new StringBuilder("My favorite fruits are: ");
builder.Append("Apples, ");
builder.Append("Bananas ");

// using String.format() internally
builder.AppendFormat("and especially {0:U}!", favoriteFruit);
builder.AppendFormat(" I eat {0} every day!", 10);

var fruits = builder.ToString();

//output: "My favorite fruits are: Apples, Bananas and especially BLUEBERRIES! I eat 10 every day!";

Methods

Method	Type	Description	Parameter
Append	Method	appends a string.	value
AppendFormat	Method	see description for format()	format, args
AppendLine	Method	appends a string in a new line.	format, args
AppendLineFormat	Method	like format() in a new line	format, args
Clear	Method	clears the StringBuilder
ToString	Method	creates the actual string.