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ActiveRecord: List columns in table from console
...rd. Crucially for me it was the only and easiest way to gain confidence in what my primary key really was at the database level.
– nibbex
Mar 11 '15 at 17:30
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Auto margins don't center image in page
... +1 For being right. Would make a great answer if you elaborated on what is required for margin:auto to center an item in the flow. (display:block or display:table, position:static or position:relative, etc.)
– Phrogz
Apr 20 '11 at 17:26
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Fast Linux File Count for a large number of files
...o all this, I have a lot of comments in the code to try to make it obvious what's going on. I wrote this and tested it on 64-bit Linux, but it should work on any POSIX-compliant system, including Microsoft Windows. Bug reports are welcome; I'm happy to update this if you can't get it working on your...
The “backspace” escape character '\b': unexpected behavior?
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Your result will vary depending on what kind of terminal or console program you're on, but yes, on most \b is a nondestructive backspace. It moves the cursor backward, but doesn't erase what's there.
So for the hello worl part, the code outputs
hello worl
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Mysql: Select rows from a table that are not in another
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i'm still confused about the query btw..what if i change "where b.FirstName is null" to "where b.LastName is null" for example? what's the difference? i'm sorry for asking this, i'm still new to sql :D
– thekucays
Jul 21 '16 a...
qmake: could not find a Qt installation of ''
...ke using which qmake.
Consider install qt4-default or qt5-default depends what version of qt you want use.
You could also use qtchooser - a wrapper used to select between Qt development binary versions.
share
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const char* concatenation
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what about char* result; result = calloc(strlen(one)+strlen(two)+1, sizeof(char)); and THEN the strcpy+strcat?
– luiscubal
Jan 3 '10 at 14:27
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how to convert java string to Date object [duplicate]
...ing the toString method on it might give you a different output, but thats what DateFormat is there for, to maintain integrity and consistency of all your date objects.
– citizen conn
Jun 28 '11 at 17:58
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C++ SFINAE examples?
...nt C::*, which I'd never seen and had to go look up. Found the answer for what that is and what it might be used for here: stackoverflow.com/questions/670734/…
– HostileFork says dont trust SE
Jul 12 '12 at 6:01
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Store a closure as a variable in Swift
... (Float)->Void = { arg in }
due to the automatic type inference.
But what you probably want is that the completion handler is initialized to nil
in the same way that an Objective-C instance variable is inititialized to nil. In Swift
this can be realized with an optional:
var completionHandler...