New operator Set-Append

[PeterH]

We have operator "=" to Set a variable.

What I often wish is a short form as "Set-Append operator" ("=." is just an example):

Code: Select all

   $listitems =. $entry;         // meaning:
   $listitems = $listitems . $entry;

OK: just sometimes the reverse, "Set-Prepend":

Code: Select all

   $listitems .= $entry;         // meaning:
   $listitems = $entry . $listitems;

It's just to save some typing, and some space in the lines.
(With indentation etc lines can be rather long sometimes. Shorter looks better. )

[bdeshi]

nice to have (at least) these as well : +=, -=, /=, \=, *=

[edited]

[PeterH]

Ha: just created some text - but Sammay has edited his text and I didn't notice Quite funny
Though I'm late: my prepared post

Just to say: this could also be used for add, subtract, multiply and divide, eg =+, =-, =* and =/
(=+ and =- would be analog to incr, but I'd prefer the syntax of =+)
(OK: to inverse the operand for subtraction and division can be 2 more versions.)
Basically I'd prefer the = on left, can be read as "set to concationation" or "Set to sum".

Though: my main use and interest is just concatenation, as I really use it very often.

And to say again: to use =. is just an example - you might have other Ideas. But containing the = shows that it's relative to the set command.

[PeterH]

Just had a laugh

So if I did explain it bad - I'm just looking for the same as the VB operator &= does.
Found it via a link to VB-docs from klownboy: thanks for that!

And I'd really use it very often. Again and again...

[highend]

Yeah, me too, so +5

[admin]

We have operator "=" to Set a variable.

What I often wish is a short form as "Set-Append operator" ("=." is just an example):

Code: Select all

   $listitems =. $entry;         // meaning:
   $listitems = $listitems . $entry;

OK: just sometimes the reverse, "Set-Prepend":

Code: Select all

   $listitems .= $entry;         // meaning:
   $listitems = $entry . $listitems;

Never heard about "Set-Prepend". In PHP (XY's role model) it's like this:

Code: Select all

$a = "Hello";
$a .= " John!";
echo $a; // Outputs Hello John!

Anyway, I always planned to add these operators, so hey-ho let's go!

BTW, I personally never liked the sequence .=, I find =. more natural. I'm inclined to allow both ways...

[PeterH]

That's fine! Hey!

"Set-Prepend" was just another idea, so:

Code: Select all

 $a = "John";
 $a =. "Hello ";

says "Hello John". (Sometimes I must build a string right to left.)
But no question: what you've made are the most often needed expressions.

You said you "Experimentally added ... Compound Assignment Operators .=, +=, -=, *=, /=, \= ."
What's the experiment?

[Filehero]

[PeterH]

For completeness: just changed one script to contain several .= seems to work fine!
Not just simple concatenations, but a bit more complex like:

Code: Select all

 $props .= SubStr("     $nr", -5) . " $propnm = (" . SubStr("     $lenval", -4) . ") $propval<crlf>";

So thanks a lot!

[jupe]

Nice!, even my meager scripting abilities will benefit from this, thanks.

[admin]

You said you "Experimentally added ... Compound Assignment Operators .=, +=, -=, *=, /=, \= ."
What's the experiment?

Well, I was a bit surprised how easy it was to add it, so I added "Experimentally" as a voodoo-kind of protection against a rude awakening. Like when you take the umbrella along in order to prevent the rain -- usually works well.

[PeterH]

Fine, that quite some scripters seem to be glad.
Fine, that it was easy.
Fine, that the voodoo seems to help.
Best of all, that you were surprised

So: all is well

Have a fine Sunday!
(I hope you like it cold.)