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Assign multiple columns using := in data.table, by group
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How to use underscore.js as a template engine?
...d about node.js and express framework. Then I saw about underscore.js as a set of utility functions. I saw this question on stackoverflow
. It says we can use underscore.js as a template engine. anybody know good tutorials about how to use underscore.js for templating, especially for biginners who...
How to use 'cp' command to exclude a specific directory?
I want to copy all files in a directory except some files in a specific sub-directory.
I have noticed that cp command didn't have the --exclude option.
So, how can I achieve this?
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Most efficient way to reverse a numpy array
...he view for writing new values into the array. reversed_arr[0] = 99 would set the last element in the array to 99, the same as arr[-1] = 99 would.
– steveha
Mar 20 '19 at 8:33
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Why doesn't Java offer operator overloading?
...ment means to copy a reference to an existing value.
Consider instead:
b.set(1, 0); // initialize to real number '1'
a = b;
b.set(2, 0);
assert( !a.equals(b) ); // this assertion will fail
In C++, this copies the value, so the comparison will result not-equal. In Java, operator= performs refere...
How to get the nvidia driver version from the command line?
For debugging CUDA code and checking compatibilities I need to find out what nvidia driver version for the GPU I have installed. I found How to get the cuda version? but that does not help me here.
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Is there a common Java utility to break a list into batches?
I wrote myself a utility to break a list into batches of given size. I just wanted to know if there is already any apache commons util for this.
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Getting SyntaxError for print with keyword argument end=' '
... isn't available in Python 2.x because print is still a statement.
print("foo" % bar, end=" ")
in Python 2.x is identical to
print ("foo" % bar, end=" ")
or
print "foo" % bar, end=" "
i.e. as a call to print with a tuple as argument.
That's obviously bad syntax (literals don't take keyword...
Xcode “Build and Archive” from command line
...gning/profile used when the .app was built. This will be whatever you have set up in the Code Signing build settings for your Release configuration.
– Mike Weller
Apr 28 '11 at 13:53
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Display filename before matching line
How can I get grep to display the filename before the matching lines in its output?
6 Answers
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