大约有 23,000 项符合查询结果（耗时：0.0437秒） [XML]
Using unset vs. setting a variable to empty
...
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...
Adjust UIButton font size to width
...
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...
Principles for Modeling CouchDB Documents
...ey/value pairs into the results of a map/reduce query, the keys are sorted based on UTF-8 collation ("a" comes before "b"). You can also output complex keys from your map/reduce as JSON arrays: ["a", "b", "c"]. Doing that would allow you to include a "tree" of sorts built out of array keys. Using yo...
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.
share
|
improve this answer
|
...
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.
...
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...
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
add a comment
|
...
How to disable breadcrumbs in Eclipse
...wardt mentions the toolbar icon
Slava Semushin provides a native shortcut based on Ctrl+3+bread, which points directly to the Toggle Java Editor Breadcrumb option.
Shachi reminds us below that you can right-click on any icon on the breadcrumb, and select the entry named "Hide Breadcrumb".
Ori...