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Rails 3 check if attribute changed
...ns an array of the attributes changed for that object.
Both @user.changed and attrs are arrays so I can get the intersection (see ary & other ary method). The result of the intersection is an array. By calling any? on the array, I get true if there is at least one intersection.
Also very usefu...
Get PostGIS version
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Since some of the functions depend on other libraries like GEOS and proj4 you might want to get their versions too. Then use:
SELECT PostGIS_full_version();
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Split delimited strings in a column and insert as new rows [duplicate]
...parate_rows function as described by @Tif below.
It works so much better, and it allows to "unnest" multiple columns in a single statement:
> head(mydf)
geneid chrom start end strand length gene_count
ENSG00000223972.5 chr1;chr1;chr1;chr1;chr1;chr1;chr1;chr1;chr1 11869;1...
How to check if an object is a certain type
...different object each time. For example, in one case I am using a ListView and in another case I am passing a DropDownList.
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Use of undeclared identifier 'kUTTypeMovie'
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You have to add the framework MobileCoreServices to the project, and then import it:
Objective C:
#import <MobileCoreServices/MobileCoreServices.h>
That will make the problem go away.
Swift 4:
import MobileCoreServices
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How to show full object in Chrome console?
... It should be noted that just printing varName in Chrome console and hitting Enter gives the same effect as console.dir(varName).
– Vadzim
Oct 16 '17 at 14:58
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CFLAGS vs CPPFLAGS
I understand that CFLAGS (or CXXFLAGS for C++) are for the compiler, whereas CPPFLAGS is used by the preprocessor.
4 Answer...
C/C++ NaN constant (literal)?
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@MikeSeymour Not by the language standard but as far as I know it should work if the compiler claims to be IEEE compliant.
– Pixelchemist
May 22 '13 at 12:23
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How do I save a String to a text file using Java?
...u would to any output stream:
out.println(text);
You'll need exception handling, as ever. Be sure to call out.close() when you've finished writing.
If you are using Java 7 or later, you can use the "try-with-resources statement" which will automatically close your PrintStream when you are done w...
Does setWidth(int pixels) use dip or px?
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The applyDimension() version executes more code and it a bit more difficult to read I find. FWIW, the line I posted is what we actually use all over the place in the framework and standard apps.
– Romain Guy
Mar 9 '10 at 5:25
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