Introduction to several common javascript string processing functions

Introduction to several common javascript string processing functions:

Function: Split ()
Function: uses a specified separator to split a string and store it in an array.

Example:

STR = "JPG | BMP | GIF | ICO | PNG ";

Arr = thestring. Split ("| ");

// Arr is an array containing character values "jpg", "BMP", "GIF", "ICO", and "PNG"

Function: John ()
Function: combines an array into a string using the separator you selected.

Example:

VaR delimitedstring = myarray. Join (delimiter );

VaR mylist = new array ("JPG", "BMP", "GIF", "ICO", "PNG ");

VaR portablelist = mylist. Join ("| ");

// The result is JPG | BMP | GIF | ICO | PNG.

Function: substring ()
Function: String truncation. For example, substring () is used to obtain "minidx" from "minidxsearchengine)

Function: indexof ()
Function: returns the subscript of the first character matching the substring in a string.

VaR mystring = "JavaScript ";

VaR W = mystring. indexof ("V"); W will be 2

VaR x = mystring. indexof ("s"); X will be 4

Var y = mystring. indexof ("script"); y will also be 4

VaR z = mystring. indexof ("key"); Z will be-1