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How to flatten only some dimensions of a numpy array
...an take -1 as an argument, meaning "total array size divided by product of all other listed dimensions":
e.g. to flatten all but the last dimension:
>>> arr = numpy.zeros((50,100,25))
>>> new_arr = arr.reshape(-1, arr.shape[-1])
>>> new_arr.shape
# (5000, 25)
...
Turning off “created by” stamp when generating files in IntelliJ
...nclude Templates in the popup action search dialog. There should be a tab called Includes on which you will find the Java and ActionScript file types, and the text can simply be removed completely if you like.
But, in more recent versions of IntelliJ things have got quite a bit easier. The first ti...
What are the differences between vector and list data types in R?
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Technically lists are vectors, although very few would use that term. "list" is one of several modes, with others being "logical", "character", "numeric", "integer". What you are calling vectors are "atomic vectors" in strict R parl...
How to check if variable's type matches Type stored in a variable
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The other answers all contain significant omissions.
The is operator does not check if the runtime type of the operand is exactly the given type; rather, it checks to see if the runtime type is compatible with the given type:
class Animal {}...
git replace local version with remote version
...ex directly use
git read-tree remote/branch:subdir/
You can then (optionally) update your working copy by doing
git checkout-index -u --force
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Output array to CSV in Ruby
...enerate_line(row) }.join("")
#=> "a1,a2,a3\nb1,b2,b3\nc1,c2,c3\n"
Do all of the above and save to a csv, in one line.
File.open("ss.csv", "w") {|f| f.write(rows.inject([]) { |csv, row| csv << CSV.generate_line(row) }.join(""))}
NOTE:
To convert an active record database to csv would...
Remove whitespaces inside a string in javascript
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For space-character removal use
"hello world".replace(/\s/g, "");
for all white space use the suggestion by Rocket in the comments below!
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C# vs C - Big performance difference
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Since you never use 'root', the compiler may have been removing the call to optimize your method.
You could try to accumulate the square root values into an accumulator, print it out at the end of the method, and see what's going on.
Edit : see Jalf's answer below
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SQL, Postgres OIDs, What are they and why are they useful?
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OIDs basically give you a built-in id for every row, contained in a system column (as opposed to a user-space column). That's handy for tables where you don't have a primary key, have duplicate rows, etc. For example, if you have a t...
What is Type-safe?
...m:
int AddTwoNumbers(int a, int b)
{
return a + b;
}
If I tried to call that using:
int Sum = AddTwoNumbers(5, "5");
The compiler would throw an error, because I am passing a string ("5"), and it is expecting an integer.
In a loosely typed language, such as javascript, I can do the follow...