ActionScript2: Split a text with two delimiter, Help

actionscript-2splitstring

I try to create a project with use a Split in AC2.

this I have

    in_pers = 3x5+5x3+6x8;

var tmp:Array = in_pers.split("+");

trace(tmp);  //output ==  3x5, 5x3, 6x8

but, how if in_pers = 3×5+5×3-6×8-4×2;

how can I get the result 3×5, 5×3, 6×8, 4×2

how to use the split with two delimiter.

Best regard..

Best Solution

There is a much simpler way to do what wikiup suggested:

function strReplace( haystack:String, needle:String, replacement:String ):String
{
    var tmpA:Array = haystack.split( needle );
    return tmpA.join( replacement );
}

function multiSplit( haystack:String, needles:Array ):Array
{
    // generate a unique String for concatenation.
    var salt:String = String( Math.random() ); //replace with anything you like

    // Replace all of the strings in the needles array with the salt variable
    for( var i:Number = 0; i < needles.length; i++ )
    {
        haystack = strReplace( haystack, needles[ i ], salt );
    }

    //haystack now only has the objects you want split up concatenated by the salt variable.
    //split haystack and you'll have your desired result.
    return haystack.split( salt );
}

Not only is this smaller, it is also faster (while takes a lot longer than for( i = 0; i < val; i++ ) (look up iteration vs. recursion) ).

Try `var_export`

You may want to check out var_export — while it doesn't provide the same output as var_dump it does provide a second $return parameter which will cause it to return its output rather than print it:

$debug = var_export($my_var, true);

Why?

I prefer this one-liner to using ob_start and ob_get_clean(). I also find that the output is a little easier to read, since it's just PHP code.

The difference between var_dump and var_export is that var_export returns a "parsable string representation of a variable" while var_dump simply dumps information about a variable. What this means in practice is that var_export gives you valid PHP code (but may not give you quite as much information about the variable, especially if you're working with resources).

Demo:

$demo = array(
    "bool" => false,
    "int" => 1,
    "float" => 3.14,
    "string" => "hello world",
    "array" => array(),
    "object" => new stdClass(),
    "resource" => tmpfile(),
    "null" => null,
);

// var_export -- nice, one-liner
$debug_export = var_export($demo, true);

// var_dump
ob_start();
var_dump($demo);
$debug_dump = ob_get_clean();

// print_r -- included for completeness, though not recommended
$debug_printr = print_r($demo, true);

The difference in output:

var_export (`$debug_export` in above example):

 array (
  'bool' => false,
  'int' => 1,
  'float' => 3.1400000000000001,
  'string' => 'hello world',
  'array' => 
  array (
  ),
  'object' => 
  stdClass::__set_state(array(
  )),
  'resource' => NULL, // Note that this resource pointer is now NULL
  'null' => NULL,
)

var_dump (`$debug_dump` in above example):

 array(8) {
  ["bool"]=>
  bool(false)
  ["int"]=>
  int(1)
  ["float"]=>
  float(3.14)
  ["string"]=>
  string(11) "hello world"
  ["array"]=>
  array(0) {
  }
  ["object"]=>
  object(stdClass)#1 (0) {
  }
  ["resource"]=>
  resource(4) of type (stream)
  ["null"]=>
  NULL
}

print_r (`$debug_printr` in above example):

Array
(
    [bool] => 
    [int] => 1
    [float] => 3.14
    [string] => hello world
    [array] => Array
        (
        )

    [object] => stdClass Object
        (
        )

    [resource] => Resource id #4
    [null] => 
)

Caveat: `var_export` does not handle circular references

If you're trying to dump a variable with circular references, calling var_export will result in a PHP warning:

 $circular = array();
 $circular['self'] =& $circular;
 var_export($circular);

Results in:

 Warning: var_export does not handle circular references in example.php on line 3
 array (
   'self' => 
   array (
     'self' => NULL,
   ),
 )

Both var_dump and print_r, on the other hand, will output the string *RECURSION* when encountering circular references.

C# – How would you count occurrences of a string (actually a char) within a string

If you're using .NET 3.5 you can do this in a one-liner with LINQ:

int count = source.Count(f => f == '/');

If you don't want to use LINQ you can do it with:

int count = source.Split('/').Length - 1;

You might be surprised to learn that your original technique seems to be about 30% faster than either of these! I've just done a quick benchmark with "/once/upon/a/time/" and the results are as follows:

Your original = 12s
source.Count = 19s
source.Split = 17s
foreach (from bobwienholt's answer) = 10s

(The times are for 50,000,000 iterations so you're unlikely to notice much difference in the real world.)

Best Solution

Related Solutions

Php – How to capture the result of var_dump to a string

Try var_export

Why?

Demo:

The difference in output:

var_export ($debug_export in above example):

var_dump ($debug_dump in above example):

print_r ($debug_printr in above example):

Caveat: var_export does not handle circular references