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Is it good practice to NULL a pointer after deleting it?
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Setting a pointer to 0 (which is "null" in standard C++, the NULL define from C is somewhat different) avoids crashes on double deletes.
Consider the following:
Foo* foo = 0; // Sets the pointer to 0 (C++ NULL)
delete foo; // Won't do anything
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Generate GUID in MySQL for existing Data?
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10 Answers
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Active
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How to convert C# nullable int to int
...if(v1==null)
v2 = default(int);
else
v2 = v1;
Also, as of .NET 4.0, Nullable<T> has a "GetValueOrDefault()" method, which is a null-safe getter that basically performs the null-coalescing shown above, so this works too:
v2 = v1.GetValueOrDefault();
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How do I use the nohup command without getting nohup.out?
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640
The nohup command only writes to nohup.out if the output would otherwise go to the terminal. If ...
What's the best way to put a c-struct in an NSArray?
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+500
NSValue doesn't only support CoreGraphics structures – you can use it for your own too. I would recommend doing so, as the class is...
Change date format in a Java string
... a String in a certain pattern into a LocalDateTime.
String oldstring = "2011-01-18 00:00:00.0";
LocalDateTime datetime = LocalDateTime.parse(oldstring, DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss.S"));
Use LocalDateTime#format() (or ZonedDateTime#format()) to format a LocalDateTime into a S...
How do I get a div to float to the bottom of its container?
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310
Set the parent div to position: relative, then the inner div to...
position: absolute;
bottom...
How to overlay images
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109
I just got done doing this exact thing in a project. The HTML side looked a bit like this:
<...
Case insensitive comparison NSString
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edited Apr 7 '19 at 11:08
Cœur
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Checking for empty queryset in Django
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answered Sep 7 '09 at 5:53
AdamAdam
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