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How to test if list element exists?
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This is actually a bit trickier than you'd think. Since a list can actually (with some effort) contain NULL elements, it might not be enough to check is.null(foo$a). A more stringent test might be to check that the name is actually defin...
Recursive directory listing in DOS
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You can use:
dir /s
If you need the list without all the header/footer information try this:
dir /s /b
(For sure this will work for DOS 6 and later; might have worked prior to that, but I can't recall.)
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Open a project in a new window in IntelliJ after “accidentally” clicking remember decision
...nted to open a new project in a separate window in IntelliJ and I "accidentally" clicked "Remember this decision and don't ask again" and clicked "open in the same window"!
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GitHub “fatal: remote origin already exists”
...me or update the existing one if you don't need it:
To add a new remote, called for example github instead of origin (which obviously already exists in your system), do the following:
$ git remote add github git@github.com:ppreyer/first_app.git
Remember though, everywhere in the tutorial you see...
git push local branch with same name as remote tag
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Change the names.
Whether you do it locally or remotely, just change the names.
A tag and a branch are fundamentally the same thing in git: they represent a pointer to a commit. The difference is that a branch pointer advances as you make commits, while a tag rem...
What was the strangest coding standard rule that you were forced to follow? [closed]
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What is the supposed point of this rule? Personally I'd fail a code review for code that could be made easier to read by putting in another return.
– Mark Baker
Oct 20 '08 at 15:31
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How do you push a tag to a remote repository using Git?
..."annotated" and "reachable from the pushed commits". I hoped it would push all reachable tags, whatever if annotated or not. Maybe edit to make sure it's not an OR?
– Gauthier
Jun 11 '15 at 13:00
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UICollectionView auto scroll to cell at IndexPath
...ection view user sets the number of image in the array of collection view. All of the cells don't fit on the screen. I have 30 cells and only 6 on the screen.
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LINQ, Where() vs FindAll()
Can someone explain how the LINQ functions Where(..) and FindAll(..) differ? They both seem to do the same thing...
4 Answe...
Comma separator for numbers in R?
...rs are encoded with the minimum number of decimal places needed to display all the elements to at least the digits significant digits. However, if all the elements then have trailing zeroes, the number of decimal places is reduced until nsmall"
– micstr
Dec 10 ...