Icon (programming Language) - Strings

Strings

In keeping with its script-like functionality, Icon adds a number of features to make working with strings easier. Most notable among these is the scanning system, which repeatedly calls functions on a string:

s ? write(find("the"))

is a short form of the examples shown earlier. In this case the subject of the find function is placed outside the parameters in front of the question-mark. Icon functions are deliberately (as opposed to automatically) written to identify the subject in parameter lists and allow them to be pulled out in this fashion.

Substrings can be extracted from a string by using a range specification within brackets. A range specification can return a point to a single character, or a slice of the string. Strings can be indexed from either the right or the left. It is important to note that positions within a string are between the characters ₁A₂B₃C₄ and can be specified from the right _-3A_-2B_-1C₀

For example

Where the last example shows using a length instead of an ending position

The subscripting specification can be used as a Lvalue within an expression. This can be used to insert strings into another string or delete parts of a string. For example,