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Is Meyers' implementation of the Singleton pattern thread safe?
.../ call placement new on s to construct it
}
return (*(reinterpret_cast<Singleton*>( &s)));
}
So here's a simple thread-safe Singleton (for Windows). It uses a simple class wrapper for the Windows CRITICAL_SECTION object so that we can have the compiler automatically initialize ...
Are there any disadvantages to always using nvarchar(MAX)?
...ost everything, from index to delete, update and inserts. "
http://sqlblogcasts.com/blogs/simons/archive/2006/02/28/Why-use-anything-but-varchar_2800_max_2900_.aspx
Integration implications - hard for other systems to know how to integrate with your database
Unpredictable growth of data
Possible s...
What is the difference between char array and char pointer in C?
...
static char __unnamed[] = "abc";
char *c = __unnamed;
Note the implicit cast from char[] to char *, which is always legal.
Then if you modify c[0], you also modify __unnamed, which is UB.
This is documented at 6.4.5 "String literals":
5 In translation phase 7, a byte or code of value zero i...
Why isn't vector a STL container?
...terface to some bit in memory and allows you to use standard operators and casts.
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How to parameterize @Scheduled(fixedDelay) with Spring 3.0 expression language?
...ationBean.stringValue}"/>
</task:scheduled-tasks>
... or if the cast from String to Long didn't work, something like this would:
<task:scheduled-tasks scheduler="myScheduler">
<task:scheduled ref="someObject" method="readLog"
fixed-rate="#{T(java.lang.Long).value...
How to convert comma-delimited string to list in Python?
...the case of integers that are included at the string, if you want to avoid casting them to int individually you can do:
mList = [int(e) if e.isdigit() else e for e in mStr.split(',')]
It is called list comprehension, and it is based on set builder notation.
ex:
>>> mStr = "1,A,B,3,4"
...
How do I serialize an object and save it to a file in Android?
..."name",ObjectSerializer.serialize(array));
To Deserialize:-
newarray = (CAST_IT_TO_PROPER_TYPE) ObjectSerializer.deSerialize(sharedPreferences.getString(name),null);
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What does the construct x = x || y mean?
...(null)
foo(undefined)
foo(0)
are not equivalent.
Double pipe (||) will cast the first argument to boolean and if resulting boolean is true - do the assignment otherwise it will assign the right part.
This matters if you check for unset parameter.
Let's say, we have a function setSalary that h...
Get nth character of a string in Swift programming language
...This isn't explicit at all and may be corrected in the future without type casting. This also doesn't work if you use shorthand for the array via [string].first. @Sulthan's solution works best to use the baked in index values. It's far more clear on what is happening here.
– Th...
How to check if an object is nullable?
... I just verified; this does not work, as Jeppe said. If the variables are cast to object, it will always return false. So you cannot determine the type of an unknown object at runtime this way. The only time this works is if the type is fixed at compile-time, and in that case you do not need a runt...