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Substr
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Revision as of 18:14, 31 August 2007 (edit) Sandman (Talk | contribs) (New page: Category:functions Category:strings ==Definition== '''INT''' substr ( <'''STRING''' str> , <'''INT''' startposition> , [<'''INT''' characters>] ) Returns a subsection of a certai...) ← Previous diff |
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Revision as of 00:43, 26 November 2007
Contents |
Definition
INT substr ( <STRING str> , <INT startposition> , [<INT characters>] )
Returns a subsection of a certain string.
Parameters
STRING str | - The string of which a subsection will be returned. |
INT startposition | - The position of the first character to be in the subsection. |
[INT characters] | - The number of characters the subsection will hold. Negative values are special; see Notes. |
Returns
STRING : The subsection.
Notes
Before Fenix 0.92, if the number of characters is specified as 0, it is interpreted the same as if the number of characters were not specified. Because of this, code like implementation of backspace functionality should be done a little different:
if(len(str)>1) str = substr(str,0,len(str)-1); else str = ""; end
Used in code: len()
If the number of characters is a negative value, the following applies: the start of the subsection will be startposition; the end of the subsection will be the length of the string minus the absolute value of characters.
Example
Private String str = "This is my string."; Begin // No specified number of characters say( substr(str,2) + "<" ); // "is is my string." say( substr(str,-7) + "<" ); // "string." // Specified number of characters say( substr(str,5,2) + "<" ); // "is" // Number of characters greater than length of string say( substr(str,2,50) + "<" ); // "is my string." say( substr(str,-7,50) + "<" ); // "is" // Negative number of characters say( substr(str,5,-5) + "<" ); // "is my st" // Special case say( substr(str,0,0) + "<" ); // "", but pre 0.92: "This is my string." Repeat frame; Until(key(_ESC)) End
Strings Functions | |
• Asc() • Atof() • Atoi() • Chr() • Find() • Ftoa() • Itoa() • Lcase() • Len() • Strrev() • Substr() • Ucase() • |