Section 3.24. Introducing the JavaScript substring() function


3.24. Introducing the JavaScript substring() function

JavaScript has a function that's just perfect for taking a string like the coffee maker is returning, and breaking it up into a few parts. Here's how you use the substring() function:

 var newStringnewString is the smaller substring returned by JavaScript. = myStringmyString is the variable that holds the string you want to break up into several smaller parts..substringsubstring() is the JavaScript function you can use to break down strings into smaller parts.(startIndex,startIndex is the position in myString you want your substring to begin at. Remember, "0" is the position of the first character, not "1"., endIndex);endIndex is the position in myString that you want your substring to end at. The character at this poisition is not included in the substring. It may help you to think of substring() as creating a string from position startIndex to position (endIndex - 1). 

 myString       1Jim   Position:     0    1    2    3    myString.length4You can use myString.length to get the length of a string, which will always be one greater than the last position in the string. 




Head Rush Ajax
Head Rush Ajax (Head First)
ISBN: 0596102259
EAN: 2147483647
Year: 2004
Pages: 241

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