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Combine two columns of text in pandas dataframe
...ese columns are named Year and quarter . I'd like to create a variable called period that makes Year = 2000 and quarter= q2 into 2000q2 .
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How to replace a character by a newline in Vim
...s a newline (more precisely, it’s treated as the input CR). Here’s a small, non-interactive example to illustrate this, using the Vim command line feature (in other words, you can copy and paste the following into a terminal to run it). xxd shows a hexdump of the resulting file.
echo bar > te...
Squash the first two commits in Git? [duplicate]
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Update July 2012 (git 1.7.12+)
You now can rebase all commits up to root, and select the second commit Y to be squashed with the first X.
git rebase -i --root master
pick sha1 X
squash sha1 Y
pick sha1 Z
git rebase [-i] --root $tip
This command can now be used to ...
What is the email subject length limit?
How many characters are allowed to be in the subject line of Internet email?
I had a scan of The RFC for email but could not see specifically how long it was allowed to be.
I have a colleague that wants to programmatically validate for it.
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How to add Git's branch name to the commit message?
I need some help with a Bash script that will automatically add the git's branch name as a hash in commit messages.
9 Answe...
github locks up mac terminal when using pull command
... go back to command mode.
Then type :w followed by enter to save.
Finally :q followed by enter to quit.
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How to break out of multiple loops?
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Its usually possible to refactor the inner loop into its own method, that returns true to continue, false to break the outer loop. while condition1: / if not MyLoop2(params): break. An alternative is to set a boolean flag, that is ...
What are the differences between a pointer variable and a reference variable in C++?
...compiling error
int &r = *p; <--- likely no compiling error, especially if the nullptr is hidden behind a function call, yet it refers to a non-existent int at address 0
Pointers can iterate over an array; you can use ++ to go to the next item that a pointer is pointing to, and + 4 to go to...
Abandoning changes without deleting from history
...rst time you push this closed head to another repository since you are actually create additional heads in the remote repository when you push. So tell Mercurial that this is okay with --force. People who pull the closed head wont be bothered by any warnings.
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Elegant way to invert a map in Scala
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@dev-null I'm sorry, but your example does not fall under the required assumption.
– Daniel C. Sobral
May 2 '19 at 17:01
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