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List columns with indexes in PostgreSQL
... WHERE tablename='mytablename' AND indexdef LIKE '%mycolumnname%' ; and verify indexcount>0. mySQL: SHOW INDEX FROM mytablename WHERE Column_name='mycolumnname' ; and verify result set not empty.
– zerobandwidth
Feb 2 '18 at 16:43
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How to loop backwards in python? [duplicate]
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range() and xrange() take a third parameter that specifies a step. So you can do the following.
range(10, 0, -1)
Which gives
[10, 9, 8, 7, 6, 5, 4, 3, 2, 1]
But for iteration, you should really be using xrange instead. So,
xrange(10, 0, -1)
Note for Python 3 users:...
Why can I not push_back a unique_ptr into a vector?
...correct. You cannot use it to manage a pointer to a local variable. The lifetime of a local variable is managed automatically: local variables are destroyed when the block ends (e.g., when the function returns, in this case). You need to dynamically allocate the object:
std::unique_ptr<int&g...
Start service in Android
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Probably you don't have the service in your manifest, or it does not have an <intent-filter> that matches your action. Examining LogCat (via adb logcat, DDMS, or the DDMS perspective in Eclipse) should turn up some warnings that may help.
More likely, you should s...
Writing your own STL Container
...edef typename A::const_reference const_reference;
typedef typename A::difference_type difference_type;
typedef typename A::size_type size_type;
class iterator {
public:
typedef typename A::difference_type difference_type;
typedef typename A::value_type value_type;
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How make Eclipse/EGit recognize existing repository information after update?
...jects again using "use or create repository".
The second step won't work if the repo isn't available in the repository view. So, after an eclipse upgrade, do the following:
Add the (already existing) local repository to EGit's Git Repositories view
Open the Git Repositories view:
Hit the "add"...
Doctrine2: Best way to handle many-to-many with extra columns in reference table
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what is the different between foreach ($album->getTracklist() as $track) { echo $track->getTrack()->getTitle(); } provided by @Crozin and consider the relationship as an entity? I think what he want to ask is how to skip the ...
Index (zero based) must be greater than or equal to zero
... answered Feb 6 '18 at 4:23
Kashif FarazKashif Faraz
17144 silver badges1515 bronze badges
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Difference between fmt.Println() and println() in Go
...ation the print(ln) functions are not designed to even remotely support a different output mode and are mainly a debug tool.
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Difference between .keystore file and .jks file
I have tried to find the difference between .keystore files and .jks files, yet I could not find it. I know jks is for "Java keystore" and both are a way to store key/value pairs.
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