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Want to find records with no associated records in Rails
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This is really good! Thanks! Now if the rails gods could perhaps implement it as a simple Person.where(contacts: nil) or Person.with(contact: contact) if using where encroaches too far into 'properness' - but given that contact: is already being parsed a...
Why git can't do hard/soft resets by path?
...set the index and the working tree to HEAD.
I think it should be clear by now why this operation is not for specific files by its nature - it is intended to move a branch head in the first place, resetting the working tree and the index is secondary functionality.
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How do I determine the size of my array in C?
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size_t n = sizeof(a) / sizeof(a[0]);
Another advantage is that you can now easily parameterize
the array name in a macro and get:
#define NELEMS(x) (sizeof(x) / sizeof((x)[0]))
int a[17];
size_t n = NELEMS(a);
share
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How to programmatically display version/build number of target in iOS app?
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Do you know if there are there any string constants for @"CFBundleShortVersionString" and @"CFBundleVersion" ?
– igrek
Oct 15 '15 at 7:36
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Android List View Drag and Drop sort
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I have been working on this for some time now. Tough to get right, and I don't claim I do, but I'm happy with it so far. My code and several demos can be found at
https://github.com/bauerca/drag-sort-listview
Its use is very similar to the TouchInterceptor (on wh...
Difference between git stash pop and git stash apply
...ains "Hello" string.
Let's modify the file and add " world" string to it. Now you want to move to a different branch to fix a minor bug you've just found, so you need to stash your changes:
git stash
You moved to the other branch, fixed the bug and now you're ready to continue working on your ma...
Foreign key constraint may cause cycles or multiple cascade paths?
...guaranteed that SomeOtherTable-records never belong to both Details, it is now impossible to make SomeOhterTable's records cascade delete for both details, because there are multiple cascading paths from Master to SomeOtherTable (one via Detail1 and one via Detail2).
Now you may already have underst...
jQuery append() vs appendChild()
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Do you know why append is "safe" and appendChild is not? What does domManip do?
– Rob Fox
Mar 17 '14 at 8:29
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How to get object size in memory? [duplicate]
I need to know how much bytes my object consumes in memory (in C#). for example how much my Hashtable , or SortedList , or List<String> .
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Computed / calculated / virtual / derived columns in PostgreSQL
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The functionality is in development right now: commitfest.postgresql.org/16/1443
– r90t
Jan 23 '18 at 12:42
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