next »

[thedarkness]

Just came across the following syntax and wondered what was the difference is, if any, between this;

$keyboard[$word{$i}]

and this;

$keyboard[$word[$i]]

?

Cheers,
td

[Bompa]

I'm out of my language, but in perl I would say the first is a hash element
and the second is an array element.


Bompa

[perkiset]

Did that actually work?

The curlybraces are for surrounding a variable name while dereferencing in a string... I've never seen that notation and I speculate that it is an error... but I'm dying to know if it worked and if so, what it did...

/p

[perkiset]

And BTW -

$keyboard[$word[$i]]

... is not actually a multi-dim array at all... its just evaluating the $word array value before evaluating the $keyboard value... multidim would look like this: $keyboard[$x][$y][$z]

/p

[thedarkness]

Of course, doh!

Perk: PM'ed you some code.

Cheers,
td

[tobsn]

thats for strings

Code:

$string = '1234567890';
for( $i = 0; $i < strlen( $string ); $i++ ) {
    echo $string{$i};
}

or it is for generating strings like $i = 1; echo $string{$i}; echo $string1; ||  $i = 'a'; echo $string{$i}; echo $stringa;

cant remember for what it was... one of the examples above 

[perkiset]

simple strings can be referenced with the normal array syntax - that's the only way I've ever done it:

$myStr = 'Hello World';
print $myStr[1]; // prints 'e'

... was this an older PHP syntax?

[m0nkeymafia]

td:

I think strings are stored as a character array, so $charArray[$i] will return the character at that index.

[perkiset]

They are... the only caveat is that this is a read only feature... unlike C you cannot write to those array positions.

Which is a drag, really...

/p

[m0nkeymafia]

Didnt know that perk, bet that caused a few people a few headaches in the past

[thedarkness]

td:

I think strings are stored as a character array, so $charArray[$i] will return the character at that index.

Yeah, I truly grok this dude. The OP was about the use of the unusual syntax, not "Can anyone teahc me how to use character arrays?" 

Cheers,
td

[perkiset]

Didnt know that perk, bet that caused a few people a few headaches in the past

Quick headache, since it is painfully obvious you can't write to the array (it'll bomb at run time) but an enormous tease... it looks SO CLOSE with the read syntax... pissed me off. I'd love direct access to that memory but doing so would open a can of worms as huge as C++ itself. The next thing you know it's pointers to pointers and self-managed garbage collection. Ah well... cest la vie...

/p