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How can I shuffle the lines of a text file on the Unix command line or in a shell script?
I want to shuffle the lines of a text file randomly and create a new file. The file may have several thousands of lines.
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How does a Breadth-First Search work when looking for Shortest Path?
I've done some research, and I seem to be missing one small part of this algorithm. I understand how a Breadth-First Search works, but I don't understand how exactly it will get me to a specific path, as opposed to just telling me where each individual node can go. I guess the easiest way to explain...
Does delete on a pointer to a subclass call the base class destructor?
...s a heap memory allocation for one of its fields. Class A is instantiated and stored as a pointer field in another class ( class B .
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Best design for a changelog / auditing database table? [closed]
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Who the heck created/updated/deleted a record
with ID=X in the table Foo and when?
So, in order to be able to answer such questions quickly (using SQL), we ended up having two additional columns in the audit table
object type (or table name)
object ID
That's when design of our audit log reall...
How to simulate a higher resolution screen? [closed]
...I'm wrong, simply create an iframe with style="desired width & height" and src="your/test.site" as the only child of <body>. Should display the site as if the resolution was the specified width/height and result in scroll bars to examine it.
Not as convenient as using a third party, havi...
How to remove a package from Laravel using composer?
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Running the following command will remove the package from vendor (or wherever you install packages), composer.json and composer.lock. Change vendor/package appropriately.
composer remove vendor/package
Obviously you'll need to remove references ...
Facebook Graph API v2.0+ - /me/friends returns empty, or only friends who also use my application
I am trying to get my friend name and ids with Graph API v2.0, but data returns empty:
7 Answers
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JPA : How to convert a native query result set to POJO class collection
...our result with the entity with tha java entity class with "@EntityResult" and "@FieldResult" annotations. Thats fine. But here i need more clarity. Is is required that the class which we are mapping with the result must be a JPA entity class ? OR can we use a simple POJO class which is not an enti...
Can you organize imports for an entire project in eclipse with a keystroke?
Wouldn't it be nice to just do a keystroke and have eclipse organize all imports in all java classes instead of just the one you are looking at? Is this possible? Is there a keystroke for it?
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Creating C macro with ## and __LINE__ (token concatenation with positioning macro)
...m is that when you have a macro replacement, the preprocessor will only expand the macros recursively if neither the stringizing operator # nor the token-pasting operator ## are applied to it. So, you have to use some extra layers of indirection, you can use the token-pasting operator with a recurs...