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How do you sort an array on multiple columns?
...lso sort the second attribute. Unless you loop it as many as the number of selected columns.. Am I right? e.g. [[A, 10], [J, 15], [A, 5], [J, 5]] => [[A, 10], [A, 5], [J, 15], [J, 5]]
– Bla...
Apr 23 '15 at 2:30
...
Expression Versus Statement
...abeled_statement
| compound_statement
| expression_statement
| selection_statement
| iteration_statement
| jump_statement
;
expression_statement
: ';'
| expression ';'
;
http://www.lysator.liu.se/c/ANSI-C-grammar-y.html
...
Is there a NumPy function to return the first index of something in an array?
...st element. Note also that where and nonzero return arrays, so you need to select the first element to get the index.
In [71]: np.argmax(a==2)
Out[71]: 2
In [72]: np.where(a==2)
Out[72]: (array([2], dtype=int64),)
In [73]: np.nonzero(a==2)
Out[73]: (array([2], dtype=int64),)
Time comparison
Ju...
Java's Interface and Haskell's type class: differences and similarities?
... class to other classes, define static methods and constructors that would select an implementation based on what return type is required in calling context, define methods that take arguments of the same type as the class implementing the interface, and various other things that don't really transl...
Debugging Scala code with simple-build-tool (sbt) and IntelliJ
...
Enter whatever name you want, and click the "Run SBT Action" checkbox and select the SBT Action jetty-run from the [...]
Create a debug configuration for remote debugging
Go to Run > Edit Configurations
Click the [+] icon and choose Remote
Enter whatever name you want and copy the line -Xdebu...
How to install packages offline?
...r you don't need to use sudo pip….
2) use virtualenv
on online machine select a directory with terminal cd and run this code:
python -m virtualenv myenv
cd myenv
source bin/activate
pip install Flask
after installing all the packages, you have to generate a requirements.txt so while your virt...
How to grep for two words existing on the same line? [duplicate]
...if performance really matters. If you run two commands, you should aim to select the less frequently occurring word in the first grep to minimize the amount of data processed by the second.
Diagnosis
The initial script is:
grep -c "word1" | grep -r "word2" logs
This is an odd command sequence....
Fork and synchronize Google Code Subversion repository into GitHub
...h. To do this, create a Launchpad project, then go to the new import page, select Subversion and enter the URL (e.g. http://projectname.googlecode.com/svn/trunk/). Depending on the project size, the initial import can take up to a few hours. Subsequent imports will run periodically.
For more docume...
Should a Netflix or Twitter-style web service use REST or SOAP? [closed]
...abases for years that have tables and columns and SQL statements that have SELECT, INSERT, UPDATE and DELETE. It should have been a piece of cake.
There are other parts of REST that some people discuss, such as self-descriptiveness, and the hypermedia constraint, but these constraints are not so si...
Simple way to find if two different lists contain exactly the same elements?
...) because we are doing O(2*n) insertions into a hashmap and O(3*n) hashmap selects. I have not fully tested this code, so beware :)
//Returns true:
listsAreEquivelent(Arrays.asList("A","A","B"),Arrays.asList("B","A","A"));
listsAreEquivelent(null,null);
//Returns false:
listsAreEquivelent(Arrays.as...