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Checking for an initial substring in Icon
To check whether a string begins with a particular sequence of
characters, use the function
match ( t, s )
where t is the target string to be searched for, and
s is the string to be searched.
- If t matches the initial characters of s,
the function returns the position within s
just after the part that matched t.
- If t does not match the initial
characters of s, the ``
match()'' function fails.
For example, the expression
match ( "foo", "rumplestiltskin" )
fails, while the expression
match ( "foo", "foobar" )
succeeds and returns the value 4, which is the position just to the
left of the
"bar" in the second argument.
Next: Scanning for a substring in Icon
See also: Using strings in Icon
Previous: Checking the initial characters of a string in Icon
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Last updated: 1996/01/06 21:12:57 UT