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What exactly does git's “rebase --preserve-merges” do (and why?)
...ase, git with --preserve-merges first identifies a list of commits made in one part of the commit graph, and then replays those commits on top of another part. The differences with --preserve-merges concern which commits are selected for replay and how that replaying works for merge commits.
To be ...
Create unique constraint with null columns
... (user_id, recipe_id)
WHERE menu_id IS NULL;
This way, there can only be one combination of (user_id, recipe_id) where menu_id IS NULL, effectively implementing the desired constraint.
Possible drawbacks: you cannot have a foreign key referencing (user_id, menu_id, recipe_id), you cannot base CLU...
Count all occurrences of a string in lots of files with grep
... This has the same limitation that it counts multiple occurrences on one line only once. I am guessing that this behavior is OK in this case, though.
– Michael Haren
Dec 16 '08 at 12:22
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Are HTTP cookies port specific?
I have two HTTP services running on one machine. I just want to know if they share their cookies or whether the browser distinguishes between the two server sockets.
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Why do we check up to the square root of a prime number to determine if it is prime?
...greater than sqrt(n) * sqrt(n) = n. So in any factorization of n, at least one of the factors must be smaller than the square root of n, and if we can't find any factors less than or equal to the square root, n must be a prime.
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Copy and paste content from one file to another file in vi
I am working with two files, and I need to copy a few lines from one file and paste into another file. I know how to copy (yy) and paste (p) in the same file. But that doesn't work for different files. How is this done?
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Explode string by one or more spaces or tabs
How can I explode a string by one or more spaces or tabs?
10 Answers
10
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How to Deep clone in javascript
How do you deep clone a Javascript object?
19 Answers
19
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When should I use Arrow functions in ECMAScript 6?
...ion:
var x = () => {};
new x(); // TypeError: x is not a constructor
One key advantage of functions over arrow functions is therefore that functions double as object constructors:
function Person(name) {
this.name = name;
}
However, the functionally identical2 ES Harmony draft class def...
How to remove all breakpoints in one step in Google Chrome?
How to remove all breakpoints in one step in Google Chrome? Using version 11.
8 Answers
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