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Foil 38 Explanation of String methods - II

From Feb 17/19 Delivered Lecture for Course CPS616 -- aJavaScript Language Objects and Frames CPS616 spring 1997 -- Feb 17 and 19 1997. by Geoffrey Fox * Important Information in IMAGE
Secs 76.3
This example introduces two new methods
actualstring.IndexOf(lookfor); // where lookfor can be any string or property holding a string
This returns index in actualstring where character in actualstring starts a substring that exactly matches lookfor
"http://www.npac.syr.edu".IndexOf("www"); // returns 7
actualstring.IndexOf(lookfor, searchfrom); // searchfrom is the index where search starts -- in example where we scan for commas, searchfrom is set to be one more than location where last comma found
IndexOf and lastIndexOf return -1 if requested string cannot be found
actualstring.lastIndexOf(lookfor, lastsearchfrom); // is just like IndexOf but starts from the end not the beginning of the string
default value of lastsearchfrom is actualstring.length-1
Northeast Parallel Architectures Center, Syracuse University, npac@npac.syr.edu

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