a = b – Talk
I thought "Equals a to b" is clearer, as it shows that it is an active process, as "a equals b" sounds more like a comparison. But I'm neither a native speaker nor is this command that unclear ;) --raedor 17:51, 16 December 2006 (CET)
- How about this one: Assigns content of b to variable a.. That should be pretty obvious to anybody, what it means. --Kronzky 18:08, 16 December 2006 (CET)
- I think planck confused a = b and a == b. I agree with Kronzky, the new definition is much more clearer. --Sniperwolf572 18:16, 16 December 2006 (CET)
- I can live with that one. :) --raedor 19:27, 16 December 2006 (CET)
- No, Planck didn't confuse this with a == b, I was just at a loss as to where this command comes from as it isn't really in the comref. Anyway the latest definition is fine. Planck 22:43, 16 December 2006 (CET)
Note that array1=array2; array2=[1,2,3]; makes array1=[1,2,3] as well since it's more like a "pointer", not a copy of. array1=+array2 *is* a copy. Confused? :) --Doolittle 18:44, 8 July 2007 (CEST)
b:Anything ?
If b is Anything it could also be Nothing, which in turn cannot be assigned to a variable. --alef 11:46, 19 June 2008 (CEST)
Language construct
- Posted on October 3, 2014 - 18:38 (UTC)
- MulleDK13
-
The assignment operator is the only operator that isn't really an operator. It is a special construct.
Take for example, the following expression:hello + 5Assuming hello contained the value 10, hello would evaluate to 10, and 10 + 5 would finally evaluate to 15.
Which is why the assignment operator wouldn't work as a regular operator.
Take for example, the following expression:hello = 10If the assignment operator was a regular operator, hello would first evaluate to nil and finally nil = 10, which wouldn't make a whole lot of sense.
To work as a regular operator, and like any other operator requiring a reference to a variable rather than the variable's value (Eg. isNil and publicVariable), its syntax would have had to be."hello" = 5
@MulleDK13 I have really difficult time understanding what you are trying to say, this is why I moved it here. Are you saying that a = 10; b = a; a = 5; b will have to be also 5? --KK
- No, that's not what I'm saying, at all. What I'm saying is, that if an operator needs the variable itself and not its value, it must take a string with its name, case in point:
- These operators all take a string representing the name of the variable, because if the syntax of isNil was:
var1 = 42;
isNil var1;
- Then var1 would evaluate to 42, and the function responsible for the isNil operator would receive 42 as the argument, while it needed a reference to the variable; just like the + operator with var1 + var1, would receive 42 and 42 as arguments, and not a reference to the variables.
- Therefore, the operators take a string containing the name, so the functions responsible for the operators can get a reference to the variable.
- The same would apply if they were to make a binary operator that needed to reference a variable, and not its value.
- And thus the = operator would need to have the syntax STRING = ANY.
- Which is the reason, I assume, they chose to make the = 'operator' a language construct, rather than a regular operator, to remove the need to enclose all the variable names in quotes.
- — MulleDK13 (talk) 02:52, 6 October 2014 (CEST)
- Join the BIKI skype chat http://forums.bistudio.com/showthread.php?131825-Skype-groups-amp-other-contact-groups Most of the active users are here --Benargee (talk) 03:45, 6 October 2014 (CEST)