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Using unset vs. setting a variable to empty
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Based on the comments above, here is a simple test:
isunset() { [[ "${!1}" != 'x' ]] && [[ "${!1-x}" == 'x' ]] && echo 1; }
isset() { [ -z "$(isunset "$1")" ] && echo 1; }
Example:
$ unset foo; [...
Search all of Git history for a string? [duplicate]
I have a code base which I want to push to GitHub as open source. In this git-controlled source tree, I have certain configuration files which contain passwords. I made sure not to track this file and I also added it to the .gitignore file. However, I want to be absolutely positive that no sensiti...
OO Design in Rails: Where to put stuff
...ermediate programmers) is to cram all logic in the app into the model (database class), controller, or view.
At some point, someone points out the "fat-model, skinny-controller" paradigm, and intermediate developers hastily excise everything from their controllers and throw it into the model, which...
Adjust UIButton font size to width
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iOS 10.3 solution based on the other answers here:
button.titleLabel!.numberOfLines = 1
button.titleLabel!.adjustsFontSizeToFitWidth = true
button.titleLabel!.baselineAdjustment = .alignCenters
Nobody mentioned baselineAdjustm...
What does “opt” mean (as in the “opt” directory)? Is it an abbreviation? [closed]
...ptional add-on software packagessource, or anything that isn't part of the base system. Only some distributions use it, others simply use /usr/local.
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How to hide Soft Keyboard when activity starts
...nputMethodManager.hideSoftInputFromWindow(windowToken, 0)
}
Alternatives based on use case:
fun Fragment.hideKeyboard() {
view?.let { activity?.hideKeyboard(it) }
}
fun Activity.hideKeyboard() {
// Calls Context.hideKeyboard
hideKeyboard(currentFocus ?: View(this))
}
fun Context.hid...
Is there a command to list SVN conflicts?
...visions after the latest one you updated with.
E.g. if your current WC is based on revision 147 this could do it:
svn merge -r 148:HEAD http://url.to.repo/repo/
It's nothing I've done myself though, so you'll have to try it yourself.
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How is Node.js inherently faster when it still relies on Threads internally?
...dern threads tend to be pretty huge, but the memory allocated by a closure-based event system would be only what's needed)
b) a real benchmark that actually gives a fair chance to the threaded server of choice. At least that way, I'd have to stop believing that the claims are essentially false ;>...
Android Studio Project Structure (v.s. Eclipse Project Structure)
...e with interdependent projects)
From the documentation (Android Studio is based on Intellij IDEA) :
Whatever you do in IntelliJ IDEA, you do that in the context of a
project. A project is an organizational unit that represents a
complete software solution.
Your finished product may be ...
Omit rows containing specific column of NA
...he cols= argument is available in the data.table::na.omit library. Not the base stats::na.omit.
– M. Viking
Aug 21 '19 at 18:39
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