Useful API Functions

String

Copying

Notice: except when written otherwise, all indices are 1-based. Valid indices range from 1 to the string's size.

copyFrom:to:

aString copyFrom:startIndex to:endIndex

Example:

 'hello world' copyFrom:1 to:5. 
 => 'hello'

copyFrom:

aString copyFrom:startIndex'

Example:

 'hello world' copyFrom:6. 
 => ' world'

copyTo:

aString copyTo:endIndex'

Example:

 'hello world' copyTo:6. 
 => 'hello '

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