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What is the difference between is_a and instanceof?
...ut PHP versions >= 5.3.9 now accept an optional third boolean argument $allow_string (defaults to false) to allow comparisons of string class names instead:
class MyBaseClass {}
class MyExtendingClass extends MyBaseClass {}
// Original behavior, evaluates to false.
is_a(MyExtendingClass::class,...
How to check if a table contains an element in Lua?
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117
You can put the values as the table's keys. For example:
function addToSet(set, key)
set[...
BASH copy all files except one
I would like to copy all files out of a dir except for one named Default.png. It seems that there are a number of ways to do this. What seems the most effective to you?
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How to determine programmatically whether a particular process is 32-bit or 64-bit
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answered Aug 11 '10 at 18:22
SamSam
2,97133 gold badges1414 silver badges33 bronze badges
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When should we use mutex and when should we use semaphore
... to sleep till you release the mutex.
Spinlock:
Use a spinlock when you really want to use a mutex but your thread is not allowed to sleep.
e.g.: An interrupt handler within OS kernel must never sleep. If it does the system will freeze / crash. If you need to insert a node to globally shared linke...
django: BooleanField, how to set the default value to true?
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answered Mar 4 '11 at 6:29
Michael C. O'ConnorMichael C. O'Connor
8,84833 gold badges3232 silver badges4848 bronze badges
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Get generated id after insert
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answered Mar 23 '11 at 18:20
GrAndGrAnd
9,70933 gold badges2727 silver badges4040 bronze badges
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How do I get a human-readable file size in bytes abbreviation using .NET?
... the OS? Windows still counts 1024 bytes as 1 KB and 1 MB = 1024 KB, Personally i wanna throw the KiB out the window and just count every thing using 1024?...
– Peter
Aug 8 '13 at 22:46
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How to write iOS app purely in C
...d in remain the same whether or not
// you are using VA_ARGS. This is actually the basis of the objective-c
// runtime (objc_msgSend), so we are probably fine here, this would be
// the last thing I would expect to break.
extern int UIApplicationMain(int, ...);
// Entry point of the application....
C# properties: how to use custom set property without private field?
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What's the difference between this and not having set at all?
– Sidhin S Thomas
Nov 11 '19 at 16:59
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