This is a porting of "typescript-string-operations" (https://github.com/sevensc/typescript-string-operations) adapted to work correctly with angular 4 and above

#
#### jQuery required. Unit tested (work in progress).
#### USAGE:

$3

``typescript
var id = String.Empty;
`

$3

`typescript
var id = image.GetId();
if(String.IsNullOrWhiteSpace(id))
return image;
`

$3

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

Specifier available!
`typescript
var value = String.Format("{0:L}", "APPLE"); //output "apple"

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

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


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

value = String.Format("{0:n}", 1000000);
//output "1.000.000"
`

| Specifier | Result |
| :-------------: |:---------------------------:|
| L | LowerCase |
| U | UpperCase |
| d | ShortDatePattern |
| s | SortableDateTimePattern |
| n | Thousand seperator |

$3

`typescript
var value = String.Join("; ", "Apple", "Banana");
//output: "Apple; Banana";
`
#### OR
`typscript
var array = ['Apple', 'Banana']
var value = String.Join("; ", 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 | Method | Converts the value of objects to strings based on the formats specified and inserts them into another string. | format, args
| Join | Method | Combines arguments delimited by given seperator.| delimiter,args
| Join | Method | Combines arguments delimited by given seperator from array. | delimiter,array`
|