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What is causing ERROR: there is no unique constraint matching given keys for referenced table?
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edited Nov 5 '15 at 13:19
Vlastimil Ovčáčík
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answered Aug...
what exactly is device pixel ratio?
...resolution is double the logical linear resolution.
Physical resolution: 960 x 640
Logical resolution: 480 x 320
The formula is:
Where:
is the physical linear resolution
and:
is the logical linear resolution
Other devices report different device pixel ratios, including non-integer ones...
Django Server Error: port is already in use
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EDIT:
For osx users you can use sudo lsof -t -i tcp:8000 | xargs kill -9
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Inspecting standard container (std::map) contents with gdb
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answered Jan 9 '09 at 10:31
jpalecekjpalecek
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How to trim a string in SQL Server before 2017?
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edited Oct 8 '08 at 15:29
answered Oct 7 '08 at 17:55
Ben...
Why are floating point numbers inaccurate?
...nt and a mantissa (also called the significand). A very simple number, say 9.2, is actually this fraction:
5179139571476070 * 2 -49
Where the exponent is -49 and the mantissa is 5179139571476070. The reason it is impossible to represent some decimal numbers this way is that both the exponent a...
Which is better: … or …
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139
Do you need a type attribute at all? If you're using HTML5, no. Otherwise, yes. HTML 4.01 and XH...
How do I force a UITextView to scroll to the top every time I change the text?
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149
UITextView*note;
[note setContentOffset:CGPointZero animated:YES];
This does it for me.
Swif...
jQuery Validate - Enable validation for hidden fields
In the new version of jQuery validation plugin 1.9 by default validation of hidden fields ignored . I'm using CKEditor for textarea input field and it hides the field and replace it with iframe. The field is there, but validation disabled for hidden fields. With validation plugin version 1.8.1 ever...
Append lines to a file using a StreamWriter
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edited Apr 19 '17 at 16:12
DWRoelands
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