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How to un-commit last un-pushed git commit without losing the changes
...will be in your working directory, whereas the LAST commit will be removed from your current branch. See git reset man
In case you did push publicly (on a branch called 'master'):
git checkout -b MyCommit //save your commit in a separate branch just in case (so you don't have to dig it from refl...
Find the division remainder of a number
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From Python 3.7, there is a new math.remainder() function:
from math import remainder
print(remainder(26,7))
Output:
-2.0 # not 5
Note, as above, it's not the same as %.
Quoting the documentation:
math.remainder(x, y)
Ret...
What is a good regular expression to match a URL? [duplicate]
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These are the droids you're looking for. This is taken from validator.js which is the library you should really use to do this. But if you want to roll your own, who am I to stop you? If you want pure regex then you can just take out the length check. I think it's a good idea ...
How to rollback just one step using rake db:migrate
...d to answer your question about where you get a migration's version number from:
The version is the numerical prefix on the migration's filename. For
example, to migrate to version 20080906120000 run
$ rake db:migrate VERSION=20080906120000
(From Running Migrations in the Rails Guides)
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Any difference between First Class Function and High Order Function
...d where parameters that are functions are treated specially, and different from "ordinary" value parameters).
So the presence of first-class functions (as a language feature) implies the presence of higher-order functions, but not the other way round.
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Rotating a point about another point (2D)
...inate system on the screen is left-handed, i.e. the x coordinate increases from left to right and the y coordinate increases from top to bottom. The origin, O(0, 0) is at the upper left corner of the screen.
A clockwise rotation around the origin of a point with coordinates (x, y) is given by the...
Force overwrite of local file with what's in origin repo?
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Full sync has few tasks:
reverting changes
removing new files
get latest from remote repository
git reset HEAD --hard
git clean -f
git pull origin master
Or else, what I prefer is that, I may create a new branch with the latest from the remote using:
git checkout origin/master -b <new branch...
How to set my default shell on Mac?
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From Terminal:
Add Fish to /etc/shells, which will require an administrative password:
sudo echo /usr/local/bin/fish >> /etc/shells
Make Fish your default shell with chsh:
chsh -s /usr/local/bin/fish
From System ...
Does a javascript if statement with multiple conditions test all of them?
...uiting isn't about performance. The original question, however, was asking from a performance standpoint.
– Anon.
Dec 18 '09 at 21:11
1
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Is there an “exists” function for jQuery?
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In my opinion, it's at least one logical indirection from the concept of "a list length that is greater than zero" to the concept of "the element(s) I wrote a selector for exist". Yeah, they're the same thing technically, but the conceptual abstraction is at a different level. ...