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
"Wikipedia" ==> "W"
"Wikipedia" ==> "k"
"Wikipedia" ==> "a"
"Wikipedia" ==> "Wi"
"Wikipedia" ==> "ia"
"Wikipedia" ==> "iki"
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,
s := "abc" s := "123" s now has a value of "a123c" s := "abcdefg" s := "ABCD" s now has a value of "abABCDefg" s := "abcdefg" s := "" s now has a value of "abefg"
Read more about this topic: Icon (programming Language)
Famous quotes containing the word strings:
“There are strings in the human heart that had better not be vibrated.”
—Charles Dickens (1812–1870)
“Death cut the strings that gave me life,
And handed me to Sorrow,
The only kind of middle wife
My folks could beg or borrow.”
—Countee Cullen (1903–1946)
“What drivel it all is!... A string of words called religion. Another string of words called philosophy. Half a dozen other strings called political ideals. And all the words either ambiguous or meaningless. And people getting so excited about them they’ll murder their neighbours for using a word they don’t happen to like. A word that probably doesn’t mean as much as a good belch. Just a noise without even the excuse of gas on the stomach.”
—Aldous Huxley (1894–1963)