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When should I use nil and NULL in Objective-C?
...e object. Let's have an example:
NSMutableArray *check = [[NSMutableArray alloc] init];
[check addObject:[NSNull null]];
[check addObject:nil];
On the second line, we will not get any error, because it is perfectly fair to insert a NSNull object into a collection type object. On the third line, w...
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...e of the implications of this (IMO ill-advised) decision: mrclay.org/index.php/2010/05/02/…
– Steve Clay
May 2 '10 at 7:08
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What is the benefit of zerofill in MySQL?
...rkByers, Practically speaking though, wouldn't most client-libraries (e.g. PHP) simply strip the zeros off before they hand it over to the application code? If so, then it really seems somewhat pointless. A bad design in the early days of MySQL.
– Pacerier
May...
php var_dump() vs print_r()
What is the difference between var_dump() and print_r() in terms of spitting out an array as string?
12 Answers
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Can PHP PDO Statements accept the table or column name as parameter?
...lowed_columns_array['tblTheTable'] = array('the_col_to_check');
Then the PHP check before running PDO looks like...
if(in_array($inTableName, $allowed_tables_array) && in_array($inColumnName,$allowed_columns_array[$inTableName]))
{
$sql = "SELECT $inColumnName AS columnInfo
...
Does file_get_contents() have a timeout setting?
... link may take more than 15 minutes to process. Now, I worry about whether PHP's file_get_contents() has a timeout period?
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Syntax for creating a two-dimensional array
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@Nawaz No, Arrays are Object in java and memory is allocated to Objects only by using new keyword.
– roottraveller
Jun 13 '17 at 9:40
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How to concatenate a std::string and an int?
... stack variables, the memory of s will be free after invoke itos. s should allocate from heap, and free after using, right?
– kgbook
Sep 10 '18 at 7:29
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The 3 different equals
... TRUE if $a is equal to $b, and they are of the same type. (introduced in PHP 4)
For more info on the need for == and ===, and situations to use each, look at the docs.
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How do I pass a unique_ptr argument to a constructor or a function?
...d for the question as to why it is exception-safe (if during the recursive allocation process memory runs out and some call of new throws std::bad_alloc, then at that time a pointer to the partly constructed list is held anonymously in a temporary of type list created for the initialiser list, and i...