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Dependency Injection vs Factory Pattern
... when it comes to usage/design the difference between dependency injection and factory is blurred or thin.
28 Answers
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What is the $? (dollar question mark) variable in shell scripting? [duplicate]
I'm trying to learn shell scripting, and I need to understand someone else's code. What is the $? variable hold? I can't Google search the answer because they block punctuation characters.
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When saving, how can you check if a field has changed?
... if you make changes to the object, save it, then makes additional changes and call save() on it AGAIN, it will still work correctly.
– philfreo
Mar 14 '12 at 22:57
17
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Is there an alternative sleep function in C to milliseconds?
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Yes - older POSIX standards defined usleep(), so this is available on Linux:
int usleep(useconds_t usec);
DESCRIPTION
The usleep() function suspends execution of the calling thread for
(at least) usec microseconds. T...
Java volatile reference vs. AtomicReference
Is there any difference between a volatile Object reference and AtomicReference in case I would just use get() and set() -methods from AtomicReference ?
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Determining if a variable is within range?
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This also works for Date and DateTime objects while === does not.
– Aditya
Jun 4 '12 at 2:23
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update columns values with column of another table based on condition [duplicate]
... @Sam, that is because you are referencing table1 in the UPDATE and FROM clauses (the same table is referenced twice). According to the script you are actually updating the field in the table you are querying rather than the one you are updating. The SET clause should reference the UPDATE...
How to remove selected commit log entries from a Git repository while keeping their changes?
...rectory is clean (commit or stash your current changes).
Run the above command. It launches your $EDITOR.
Replace pick before C and D by squash. It will meld C and D into B. If you want to delete a commit then just delete its line.
If you are lost, type:
$ git rebase --abort
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How can I convert a DOM element to a jQuery element?
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What about the reverse? You have a jquery element and want to convert it to a dom element?
– Ryan Sampson
Apr 1 '10 at 20:50
2
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How to create a simple proxy in C#?
I have downloaded Privoxy few weeks ago and for the fun I was curious to know how a simple version of it can be done.
10 An...