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What does an underscore in front of an import statement mean?
...initialization), use the blank identifier as explicit package name:
import _ "lib/math"
In sqlite3
In the case of go-sqlite3, the underscore import is used for the side-effect of registering the sqlite3 driver as a database driver in the init() function, without importing any other functions:
sql.R...
Undo git reset --hard with uncommitted files in the staging area
...e of problems - --cached should be --cache, and I found that it didn't actually create the .git/lost-found directory. However, the following steps worked for me:
git fsck --cache --unreachable $(git for-each-ref --format="%(objectname)")
That should output all objects in the object database that...
Hidden features of Scala
... more. Every Regex object in Scala has an extractor (see answer from oxbox_lakes above) that gives you access to the match groups. So you can do something like:
// Regex to split a date in the format Y/M/D.
val regex = "(\\d+)/(\\d+)/(\\d+)".r
val regex(year, month, day) = "2010/1/13"
The secon...
Interface/enum listing standard mime-type constants
...mons, jax, jboss, javax) for an interface or enum that lists the values of all the standard mime-type (aka content-type).
1...
Pull to refresh UITableView without UITableViewController
...reshControl()
refreshControl.addTarget(self, action: #selector(refresh(_:)), for: .valueChanged)
if #available(iOS 10.0, *) {
tableView.refreshControl = refreshControl
} else {
tableView.backgroundView = refreshControl
}
}
@objc func refresh(_ refreshControl: UIRefr...
How to make an empty div take space
...ing a <table> here, though? They will do this kind of stuff automatically.
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Extract a dplyr tbl column as a vector
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This seems the most versatile method as it works identically with vectors and data.frames, i.e. it enables functions to be more agnostic.
– geotheory
Mar 14 '17 at 10:03
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Android SDK on a 64-bit linux machine
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Yes, it is. You need to install the ia32 libraries. Check out the Ubuntu Linux troubleshooting section.
apt-get install ia32-libs
apt-get install sun-java6-jdk
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How to duplicate object properties in another object?
...r the idea of applying any rules to any situation harmful and unwise. Like all these pattern-driven development practices that are going on, so don't take it personal…
– Michael Krelin - hacker
Oct 3 '12 at 20:03
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Android Studio: Plugin with id 'android-library' not found
... @binil This is a version of Android Gradle plugin not the Gradle itself. All versions are listed on Maven Repository mvnrepository.com/artifact/com.android.tools.build/gradle To list build dependencies run gradle buildEnvironment
– Grzegorz Żur
Dec 8 '16 at ...