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How can I format my grep output to show line numbers at the end of the line, and also the hit count?
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-n returns line number.
-i is for ignore-case. Only to be used if case matching is not necessary
$ grep -in null myfile.txt
2:example two null,
4:example four null,
Combine with awk to print out the line number after the match:
$ grep -in null myfile....
扩展App Inventor：具有多点触控和手势检测功能 · App Inventor 2 中文网
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扩展App Inventor：具有多点触控和手势检测功能
Xinyue Deng (dxy0420@mit.edu)
Hal Abelson (hal@mit.edu)
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扩展App Inventor：具有多点触控和手势检测功能
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扩展App Inventor：具有多点触控和手势检测功能
Xinyue Deng (dxy0420@mit.edu)
Hal Abelson (hal@mit.edu)
...
扩展App Inventor：具有多点触控和手势检测功能 · App Inventor 2 中文网
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扩展App Inventor：具有多点触控和手势检测功能
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扩展App Inventor：具有多点触控和手势检测功能
Xinyue Deng (dxy0420@mit.edu)
Hal Abelson (hal@mit.edu)
...
扩展App Inventor：具有多点触控和手势检测功能 · App Inventor 2 中文网
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扩展App Inventor：具有多点触控和手势检测功能
Xinyue Deng (dxy0420@mit.edu)
Hal Abelson (hal@mit.edu)
...
async/await - when to return a Task vs void?
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1) Normally, you would want to return a Task. The main exception should be when you need to have a void return type (for events). If there's no reason to disallow having the caller await your task, why disallow it?
2) async meth...
How to check if variable's type matches Type stored in a variable
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The other answers all contain significant omissions.
The is operator does not check if the runtime type of the operand is exactly the given type; rather, it checks to see if the runtime type is compatible with the given type:
class Animal {}
class Tiger : Animal {}
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object x = new Tiger...
Why git can't remember my passphrase under Windows
...ame issue and several answers here did not completely answer the question for me. Here is two step-by-step solutions, depending on whether you use TortoiseGit in addition to msysgit or not.
First solution Assumes Windows, msysgit, and PuTTY.
Install msysgit and PuTTY as instructed.
(Optional) Add...
What is a “context bound” in Scala?
...provements.
Generally, a type parameter with a context bound is of the form [T: Bound]; it is expanded to plain type parameter T together with an implicit parameter of type Bound[T].
Consider the method tabulate which forms an array from the results of applying
a given function f on a range of...