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Rails mapping array of hashes onto single hash
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@redgetan is that any different from input.reduce(:merge)?
– David van Geest
May 12 '15 at 14:13
1
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Is there a standard naming convention for XML elements? [closed]
...ttribute="someValue"/>
In particular, the spaces cause a few glitches if mixed with code-generators (i.e. to [de]serialize xml to objects), since not many languages allow enums with spaces (demanding a mapping between the two).
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Remove all files except some from a directory
...th] -type f -not -name 'textfile.txt' -not -name 'backup.tar.gz' -delete
If you don't specify -type f find will also list directories, which you may not want.
Or a more general solution using the very useful combination find | xargs:
find [path] -type f -not -name 'EXPR' -print0 | xargs -0 rm ...
Create a nonclustered non-unique index within the CREATE TABLE statement with SQL Server
...tic reasons. I thought it could be convenient to anyone reading the script if all constraints/indexes are contained within the same statement. Personally, I like to know whether columns belonging to a foreign key also have an index, and this may have been a nice method to logically group this inform...
What is the meaning of erb?
...lar to ".rhtml" extension of rails file.
You can see a detailed and nice difference between ".html.erb" and ".rhtml" Click Here
Same as ".rhtml", you can also rename ".rjs" extension to ".js.erb" or ".rxml" to ".xml.erb"
This format separates out content type from template engine which is "erb" i...
How to track down a “double free or corruption” error
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If you're using glibc, you can set the MALLOC_CHECK_ environment variable to 2, this will cause glibc to use an error tolerant version of malloc, which will cause your program to abort at the point where the double free is do...
How to comment in Vim's config files: “.vimrc”?
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add a pipe before the double qoute if there is a command on the left of the comment
– Hartmut P.
Sep 23 '19 at 20:04
add a comment
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Sharing src/test classes between modules in a multi-module maven project
...gin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-jar-plugin</artifactId>
<version>2.2</version>
<executions>
<execution>
<goals>
<goal>test-jar</goal>
</goals>
</execut...
Argmax of numpy array returning non-flat indices
...get the non-flat index of all occurrences of the maximum value, you can modify eumiro's answer slightly by using argwhere instead of where:
np.argwhere(a==a.max())
>>> a = np.array([[1,2,4],[4,3,4]])
>>> np.argwhere(a==a.max())
array([[0, 2],
[1, 0],
[1, 2]])
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PHP: Count a stdClass object
...ble interface). Try casting the object, like below, as an array and seeing if that helps.
$total = count((array)$obj);
Simply casting an object as an array won't always work but being a simple stdClass object it should get the job done here.
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