5 var result = trySomething();
6 switch (result){
7 case None:
8 trace("Got None");
9 case Some(s):
10 trace("Got a value: " +s);
11 }
12 }
13
14 static function
15 trySomething():Option
16 if (Math.random() > 0.5) {
17 return None;
18 } else {
19 return Some("Success");
20 }
21 }
22 }
10.3 Regular Expressions
Haxe has built-in support forregular expressions^1. They can be used to verify the format of a
string, transform a string or extract some regular data from a given text.
Haxe has special syntax for creating regular expressions. We can create a regular expression
object by typing it between the ̃/combination and a single/character:
1 var r = ̃/haxe/i;
Alternatively, we can create regular expression with regular syntax:
1 var r = new EReg("haxe", "i");
First argument is a string with regular expression pattern, second one is a string withflags
(see below).
We can use standard regular expression patterns such as:- .any character
- *repeat zero-or-more
- +repeat one-or-more
- ?optional zero-or-one
- [A-Z0-9]character ranges
- [ˆ\r\n\t]character not-in-range
- (...)parenthesis to match groups of characters
- ˆbeginning of the string (beginning of a line in multiline matching mode)
- $end of the string (end of a line in multiline matching mode)