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Soft wrap at 80 characters in Vim in window of arbitrary width
... 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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Why is early return slower than else?
... 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's the difference between the build and create methods in FactoryGirl?
...rl.build(:factory_name).valid? which run validations without saving to database.
– jinavar1
Jan 31 '14 at 14:09
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Cannot add or update a child row: a foreign key constraint fails
...date a row to table2 that does not have a valid value for the UserID field based on the values currently stored in table1. If you post some more code I can help you diagnose the specific cause.
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What can you use Python generator functions for?
... domain.
First thing you need is to select your domain names from the database.
Let's say your table name is domains and column name is domain.
If you use SELECT domain FROM domains it's going to return 100 million rows which is going to consume lot of memory. So your server might crash.
So you ...
Finding what branch a Git commit came from
... an alternative written in Python that's working very well for me.
It is based on "Find merge commit which include a specific commit".
git when-merged [OPTIONS] COMMIT [BRANCH...]
Find when a commit was merged into one or more branches.
Find the merge commit that brought COMMIT into the s...
Comment out text in R Markdown (Rmd file)
... 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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Find the closest ancestor element that has a specific class
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Based on the the8472 answer and https://developer.mozilla.org/en-US/docs/Web/API/Element/matches here is cross-platform 2017 solution:
if (!Element.prototype.matches) {
Element.prototype.matches =
Element.prototy...
Move assignment operator and `if (this != &rhs)`
...iting a high level class that doesn't directly manage memory (but may have bases or members that do), then the best implementation of move assignment is often:
Class& operator=(Class&&) = default;
This will move assign each base and each member in turn, and will not include a this != ...
“:” (colon) in C struct - what does it mean? [duplicate]
...is used in expressions in exactly the same way as a variable
of the same base type would be used, regardless of how many bits are
in the bit field.
A quick sample illustrates this nicely. Interestingly, with mixed types the compiler seems to default to sizeof (int).
struct
{
int a : 4...