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haxe case pattern reuseing - maybe as a variable


haxe case pattern reuseing - maybe as a variable

By : Zeus
Date : November 16 2020, 06:23 AM
This might help you You may use an extractor.
code :
class Test {
    static function myPattern(str:String):Bool {
        return switch (str) {
            case 'x' | 'y' | 'color':
                true;
            case _:
                false;
        }
    }
    static function main():Void {
        var field = "x";
        switch (field) {
            case myPattern(_) => true:
                trace('myPattern');
            case _:
                trace('$field is not myPattern');
        }
    }
}
enum MyEnum
{
    A;
    B;
    C;
}

class Test {
    static function ab(str:MyEnum):Bool {
        return switch (str) {
            case A | B:
                true;
            case _:
                false;
        }
    }
    static function main():Void {
        var field = A;
        switch (field) {
            case ab(_) => true:
                trace('A|B');
            case C:
                trace('$field is not A|B');
        }
    }
}
Test.hx:19: characters 10-15 : Unmatched patterns: B | A
Test.hx:19: characters 10-15 : Note: Patterns with extractors may require a default pattern


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why tag changed in tableview to reuseing cells

why tag changed in tableview to reuseing cells


By : G. Fiore
Date : March 29 2020, 07:55 AM
around this issue i am getting solution for my app,
to using dynamic cell identifier in my code
code :
NSString *CellIdentifier =[NSString stringWithFormat:@"%i-%i", indexPath.section,indexPath.row];
In Haxe switch/case, is there a way to mix a case 'xx': with the default:?

In Haxe switch/case, is there a way to mix a case 'xx': with the default:?


By : Киселев Владимир
Date : March 29 2020, 07:55 AM
should help you out I just managed to figure out a working solution for Haxe 3. Unfortunately it doesn't compile in Haxe 2.10, the version that I'm using right now. (Edit: I found a way for Haxe 2, see the other answer below).
The documentation here (http://haxe.org/manual/lf-pattern-matching-introduction.html) says that that " a _ pattern matches anything, so case _: is equal to default: ".
code :
switch(s) {
    case 'reset': trace("...");
    case 'stat','stats': trace("...");
    case 'help', _: trace("...");
}
scala error illegal variable in pattern alternative on pattern matching case

scala error illegal variable in pattern alternative on pattern matching case


By : Iron Harvy
Date : March 29 2020, 07:55 AM
I hope this helps . I am new to scala. I was writing a pattern matching as below: , This is how you pattern match on Options:
code :
def show(x: Option[String]) = x match {
  case Some(s) => s
  case None => "N/A"
}
capitals.get("test").getOrElse("N/A")
def show(x: Option[String]) = x match {
  case Some(_) | None => "a"
}
Pattern Substitution in Haxe

Pattern Substitution in Haxe


By : promise
Date : March 29 2020, 07:55 AM
will help you , You need to remove the surrounding []. This works as expected:
code :
var r2 = ~/\(%MSG_ID%\)+/g;
Switch-case in haxe

Switch-case in haxe


By : Damian Marcos Vilte
Date : March 29 2020, 07:55 AM
Does that help This is due that compiler detects patterns which will never match the input value http://haxe.org/manual/lf-pattern-matching-unused.html
In this case it might be bug https://github.com/HaxeFoundation/haxe/issues/4387 if You use haxe 3.2, try 3.1.3 to ensure.
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