A method analogy between JavaScript and objective-c strings and arrays

String vs NSString

JavaScript String	obj-c NSString
CharAt (Index)	(See text)
charCodeAt (Index)	-(Unichar) Characteratindex: (nsuinteger) index
Concat (String)	-(NSString *) stringbyappendingstring: (NSString *) astring
IndexOf (String)	-(Nsrange) rangeofstring: (NSString *) astring
LastIndexOf (String)	-(Nsrange) rangeofstring: (NSString *) astring Options:nsbackwardssearch
Localecompare (String)	-(Nscomparisonresult) Localizedcompare: (NSString *) astring
Split (delimiter)	-(Nsarray *) componentsseparatedbystring: (NSString *) separator
SUBSTRING (startIndex)	-(NSString *) Substringwithrange: (Nsrange) Arange
toLowerCase ()	-(NSString *) lowercasestring
toUpperCase ()	-(NSString *) uppercasestring

Array vs Nsarray

JavaScript Array	obj-c Nsarray
Length	-(Nsuinteger) Count
Concat (item1[, item2 ...])	-(Nsarray *) Arraybyaddingobject: (ID) anobject -(Nsarray *) Arraybyaddingobjectsfromarray: (Nsarray *) Otherarray
Join (delimiter)	-(NSString *) componentsjoinedbystring: (NSString *) separator
Sort ()	-(Nsarray *) Sortedarrayusingfunction: (Nsinteger (*) (ID, id, void *)) Comparator context: (void *) context
ToString ()	-(NSString *) description

Excerpt from: Learning the IOS 4 SDK for JavaScript programmers

PDF download >>

A method analogy between JavaScript and objective-c strings and arrays