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What does the “@” symbol mean in reference to lists in Haskell?
...in your function. One example where this is the case is the tails function from the standard library:
tails :: [a] -> [[a]]
tails [] = [[]]
tails xxs@(_:xs) = xxs : tails xs
sha...
How to create a tuple with only one element
...:
>>> a = [('a',), ('b',), ('c', 'd')]
^ ^
From the Python Docs:
A special problem is the construction of tuples containing 0 or 1 items: the syntax has some extra quirks to accommodate these. Empty tuples are constructed by an empty pair of parentheses; a tuple w...
Take all my changes on the current branch and move them to a new branch in Git
...
If you are trying to move the work from master to a branch that already exists, but is behind master, git won't let you switch to the other branch. In this case, do this:
git stash
git checkout oldBranch
git merge master
git checkout master
git stash apply
gi...
What exactly happens when I set LoadUserProfile of IIS pool?
...UserProfile=true in IIS and change the default temp folder %TEMP% location from C:\Users\C:\Users\AccountName\AppData\Local\Temp to somewhere else? example "D:\AppTempData"
– Murali Murugesan
Jul 18 '16 at 10:18
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How to quit scala 2.11.0 REPL?
In the last version of scala (2.10.3) REPL, I can type exit to quit from REPL. However, in Scala 2.11.0 this doesn't work.
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How to test Spring Data repositories?
...en I change the implementation for spring-data (by extending the interface from Repository), the test fails and userRepository.findOne returns null. Any ideas of how to solve this?
– Rega
Aug 10 '19 at 20:31
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How to avoid overflow in expr. A * B - C * D
...X,MAX,2}. The OP says "Each number can be really big", but it isn't clear from the problem statement that each number must be really big.
– Kevin K
Nov 5 '12 at 21:28
4
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Setting up a git remote origin
...origin G:/group/project/ # local, Win
This keeps you from having to manually edit your git config or specify branch tracking manually.
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Jquery to change form action
...nk that triggered the modal
var cURL= link.data('url');// Extract info from data-* attributes
$("#delUserform").attr("action", cURL);
});
If you are trying to change the form action on regular page, use below code
$("#yourElementId").change(function() {
var action = <generate_ac...
Postgresql: Conditionally unique constraint
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This note was removed from the docs in august 2015
– Raniz
Dec 18 '19 at 13:34
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