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count number of lines in terminal output
...ing to wc will work for any output, not just grep output. For example, it can be combined with a git diff.
– Jason L.
Aug 15 '18 at 18:44
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Appending an element to the end of a list in Scala
I can't add an element of type T into a list List[T] .
I tried with myList ::= myElement but it seems it creates a strange object and accessing to myList.last always returns the first element that was put inside the list. How can I solve this problem?
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How do I download a tarball from GitHub using cURL?
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Why lately there are certificates problems on raw.github.com? I had problems to install homebrew and rvm on a new machine. I used to copy and paste from the homepage and was working. Now I get the certificate problem: ruby -e "$(curl -fsSL raw.github....
Scala: Abstract types vs generics
I was reading A Tour of Scala: Abstract Types . When is it better to use abstract types?
4 Answers
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Extract elements of list at odd positions
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Solution
Yes, you can:
l = L[1::2]
And this is all. The result will contain the elements placed on the following positions (0-based, so first element is at position 0, second at 1 etc.):
1, 3, 5
so the result (actual numbers) will be:
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Create list of single item repeated N times
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You can also write:
[e] * n
You should note that if e is for example an empty list you get a list with n references to the same list, not n independent empty lists.
Performance testing
At first glance it seems that repeat i...
How can I generate a self-signed certificate with SubjectAltName using OpenSSL? [closed]
I am trying to generate a self-signed certificate with OpenSSL with SubjectAltName in it.While I am generating the csr for the certificate, my guess is I have to use v3 extensions of OpenSSL x509.
I am using :
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Telling gcc directly to link a library statically
...,-Bstatic in order to tell gcc which libraries I want to link with statically. After all I'm telling gcc directly all other information about linking with libraries ( -Ldir , -llibname ).
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Is there a way to follow redirects with command line cURL?
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Use the location header flag:
curl -L <URL>
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Linq: GroupBy, Sum and Count
...ation on aggregate results using group by, but I wanted to offer a word of caution when using this against EntityFramework. The First/FirstOrDefault will cause EF to generate nested selects which can have serious performance implications. Kirill's suggestion of using GroupBy generates the SQL one w...