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How to add leading zeros?
...
Here's a generalizable base R function:
pad_left <- function(x, len = 1 + max(nchar(x)), char = '0'){
unlist(lapply(x, function(x) {
paste0(
paste(rep(char, len - nchar(x)), collapse = ''),
x
)
}...
How to get “their” changes in the middle of conflicting Git rebase?
... to use:
git checkout --ours foo/bar.java
git add foo/bar.java
If you rebase a branch feature_x against master (i.e. running git rebase master while on branch feature_x), during rebasing ours refers to master and theirs to feature_x.
As pointed out in the git-rebase docs:
Note that a rebase ...
How do you rename a Git tag?
...: git tag -d OLD.
The quote regarding "the Git way" and (in)sanity is off base, because it's talking about preserving a tag name, but making it refer to a different repository state.
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improv...
What does “#pragma comment” mean?
... for help, clarification, or responding to other answers.Making statements based on opinion; back them up with references or personal experience.To learn more, see our tips on writing great answers.
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Keep only date part when using pandas.to_datetime
...stored as an array of pointers and is inefficient relative to a pure NumPy-based series.
Since your concern is format when writing to CSV, just use the date_format parameter of to_csv. For example:
df.to_csv(filename, date_format='%Y-%m-%d')
See Python's strftime directives for formatting conven...
twig: IF with multiple conditions
... for help, clarification, or responding to other answers.Making statements based on opinion; back them up with references or personal experience.To learn more, see our tips on writing great answers.
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What is a message pump?
...
John is talking about how the Windows system (and other window based systems - X Window, original Mac OS....) implement asynchronous user interfaces using events via a message system.
Behind the scenes for each application there is a messaging system where each window can send events to...
What are forward declarations in C++?
...r at renaming stuff automatically). So there is a tradeoff. I've seen code bases where nobody bothers. If you find yourself repeating the same forward defines, you could always put them into a separate header file and include that, something like: stackoverflow.com/questions/4300696/what-is-the-iosf...
How to revert multiple git commits?
...rite (change) history that you have published, because somebody might have based their work on it. If you rewrite (change) history, you would make problems with merging their changes and with updating for them.
So the solution is to create a new commit which reverts changes that you want to get ri...
Python memoising/deferred lookup property decorator
Recently I've gone through an existing code base containing many classes where instance attributes reflect values stored in a database. I've refactored a lot of these attributes to have their database lookups be deferred, ie. not be initialised in the constructor but only upon first read. These attr...