> but you're trying to pass stuff to it:
>
>public function tostring() {
> $str = $this->binstr($this->bits[0]);
> for ($i=1;$i<8;$i++)
>$str .= "," . $this->binstr($this->bits[$i]);
> return $str;
>}
Slap (on my face)! My stupidity... I come from a strongly typed
leledumbo wrote:
Good points, I'll try it.
Without testing it (it's late here), your binstr() function doesn't
accept parameters, so it would always return the same result each time
it's called, regardless of what you pass into it.
In case you want to check it tomorrow or later:
private func
Good points, I'll try it.
> Without testing it (it's late here), your binstr() function doesn't
> accept parameters, so it would always return the same result each time
> it's called, regardless of what you pass into it.
In case you want to check it tomorrow or later:
private function binstr()
On Wed, Feb 25, 2009 at 12:12 AM, leledumbo wrote:
>
>> Generally relationships like the one you describe are stored in three
>> separate and related tables: Students, Courses, and Enrollment. The
>> latter is a n:m association between the first two. The advantage this
>> approach has with regard
> Generally relationships like the one you describe are stored in three
> separate and related tables: Students, Courses, and Enrollment. The
> latter is a n:m association between the first two. The advantage this
> approach has with regard to storage is that it is a sparse matrix.
I've done that
On Tue, Feb 24, 2009 at 3:24 AM, leledumbo wrote:
>
> Just tried serializing array of 256 booleans and printing the length, it
> really shocked me: 2458. This project will be used by about 500 students, so
> in the worst case (all students enroll all courses) it will eat 500 * 2458
> (assuming one
Just tried serializing array of 256 booleans and printing the length, it
really shocked me: 2458. This project will be used by about 500 students, so
in the worst case (all students enroll all courses) it will eat 500 * 2458
(assuming one character eats one byte) = 1229000 Bytes ~= 1.2 MB. Not a b
> you should not worry about optimizing boolean values unless you would store
them in database.
I DO need to store them in a database, that's why I'm asking. I won't care
if I only use PHP, since it won't keep my data in memory for a long time.
> anyways, use bitwise operators
I think I've stated
> Some languages allows to bit-pack structures to save spaces. Since PHP
> doesn't have native set data type and operations, will array of booleans be
> optimized as such? If not, how can I achieve the same result? I need to save
> about 200 boolean values and I guess it's a good idea to use bitset
Some languages allows to bit-pack structures to save spaces. Since PHP
doesn't have native set data type and operations, will array of booleans be
optimized as such? If not, how can I achieve the same result? I need to save
about 200 boolean values and I guess it's a good idea to use bitsets.
Req
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