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Is if(items != null) superfluous before foreach(T item in items)?
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It is not superflous. At runtime items will be casted to an IEnumerable and its GetEnumerator method will be called. That will cause a dereferencing of items that will fail
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How to do a regular expression replace in MySQL?
...t and I don't know if you have a multibyte charset as your default: select cast( T.R as char) COLLATE utf8_unicode_ci from (select preg_replace('/ä/', '', 'öõüä') R ) T
– gillyspy
Feb 9 '14 at 19:46
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Zipping streams using JDK8 with lambda (java.util.stream.Streams.zip)
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Unless I'm missing something, there is no need for any cast (e.g. to Spliterator<A>).
– jub0bs
Aug 11 '16 at 14:41
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jQuery SVG, why can't I addClass?
...VGAnimatedString { baseVal="test svg", animVal="test svg"}
If we were to cast that SVGAnimatedString object to a string as jQuery does, we would have [object SVGAnimatedString], which is where jQuery fails.
How the jQuery SVG plugin handles this:
The jQuery SVG plugin works around this by patching...
How to implement onBackPressed() in Fragments?
...mixing safe calls (.?) and enforcing non-nulls (!!) can lead to NPEs - the cast is not always safe. I'd rather write if ((fragment as? IOnBackPressed)?.onBackPressed()?.not() == true) { ... } or more kotliney (fragment as? IOnBackPressed)?.onBackPressed()?.not()?.let { ... }
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Difference between 'new operator' and 'operator new'?
...own container, you can call operator new directly, like:
char *x = static_cast<char *>(operator new(100));
It's also possible to overload operator new either globally, or for a specific class. IIRC, the signature is:
void *operator new(size_t);
Of course, if you overload an operator new...
Is it safe to check floating point values for equality to 0?
...rns true
The problem is, programmer sometimes forgets that implicit type cast (double to float) is happening for the comparison and the it results into a bug.
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Is there a VB.NET equivalent for C#'s '??' operator?
... +1 for providing an implementation using generics and avoiding type casting/boxing/unboxing
– ulty4life
Dec 10 '13 at 22:54
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Is there a simple way to convert C++ enum to string?
...(temp.str()); \
os << enumName << "::" << strings[static_cast<int>(value)]; \
return os;}
To use this in your code, simply do:
AWESOME_MAKE_ENUM(Animal,
DOG,
CAT,
HORSE
);
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How to change to an older version of Node.js
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on ubuntu ,the following error is casted:npm WARN using --force I sure hope you know what you are doing.
– Harlan Chen
Dec 15 '18 at 6:29
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