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Delete specific line number(s) from a text file using sed?
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If you want to delete lines 5 through 10 and 12:
sed -e '5,10d;12d' file
This will print the results to the screen. If you want to save the results to the same file:
sed -i.bak -e '5,10d;12d' file
This will back the file up to file.bak, and delete the given li...
@selector() in Swift?
...unction has no parameters, the only way to disambiguate it is to use an as cast with the function's type signature (e.g. foo as () -> () vs foo(_:)).
There's a special syntax for property getter/setter pairs in Swift 3.0+. For example, given a var foo: Int, you can use #selector(getter: MyClass.f...
ViewPager with Google Maps API v2: mysterious black view
...kground on top of the ViewPager inside a FrameLayout:
<FrameLayout
android:layout_width="match_parent"
android:layout_height="match_parent" >
<android.support.v4.view.ViewPager
android:id="@+id/fragment_container"
android:layout_width="match_parent"
and...
Which exception should I raise on bad/illegal argument combinations in Python?
...string knowing that non-empty strings are always True. It might save him a cast.
If the arguments have invalid values, raise ValueError. This seems more appropriate in your case:
if recurse and not save:
raise ValueError("If recurse is True, save should be True too")
Or in this specific case...
What is the difference between SQL, PL-SQL and T-SQL?
What is the difference between SQL, PL-SQL and T-SQL?
6 Answers
6
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git-upload-pack: command not found, when cloning remote Git repo
..., try this:
ssh you@remotemachine echo \$PATH
(That works in Bash, Zsh, and tcsh, and probably other shells too.)
If the path it gives back doesn't include the directory that has git-upload-pack, you need to fix it by setting it in .bashrc (for Bash), .zshenv (for Zsh), .cshrc (for tcsh) or equi...
How to detect online/offline event cross-browser?
...to accurately detect when the browser goes offline, using the HTML5 online and offline events.
14 Answers
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Intellij IDEA, format all code in a project
...on a larger project with other developers who don't conform to your style, and you're using IntelliJ to transform all their code every time you edit it, you might be causing a problem with your version control system. It will long a huge volume of changes when you check in, and few of them will hav...
How do you trigger a block after a delay, like -performSelector:withObject:afterDelay:?
...a floating-point arithmetic, yielding 500000000.0, before it is explicitly casted back to a 64-bit integer. So it's perfectly acceptable to use a fraction of NSEC_PER_SEC.
– junjie
Jul 2 '17 at 14:05
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What is the difference between task and thread?
...m.Threading.Tasks namespace. What is the true difference between Thread and Task . I did some sample program(help taken from MSDN) for my own sake of learning with
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