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Remove blank lines with grep
I tried grep -v '^$' in Linux and that didn't work. This file came from a Windows file system.
14 Answers
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Difference between java.io.PrintWriter and java.io.BufferedWriter?
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The API reference for BufferedWriter and PrintWriter detail the differences.
The main reason to use the PrintWriter is to get access to the printXXX methods like println(). You can essentially use a PrintWriter to write to a file just like you would use System...
Check for internet connection availability in Swift
...I wanted a more pure Swift solution. The existing Apple Reachability class and other third party libraries seemed to be too complicated for me to translate to Swift. I Googled some more and I came across this article which shows a simple method to check for network availability. I set out to transla...
How do I find the number of arguments passed to a Bash script?
...rage of the numbers is: $avg" which helps me to get unkown numbers of args and do some math (you can edit the operand) Thanks for Dennis Williamson, I did it. I'm posting to code because it may be usefull for someone.
– kaan yılmaz
Mar 4 '16 at 11:28
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java.lang.IllegalArgumentException: View not attached to window manager
I have an activity that starts AsyncTask and shows progress dialog for the duration of operation. The activity is declared NOT be recreated by rotation or keyboard slide.
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What's the 'environment' task in Rake?
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You can get access to your models, and in fact, your whole environment by making tasks dependent on the environment task. This lets you do things like run rake RAILS_ENV=staging db:migrate.
See "Custom Rake Tasks".
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Using LINQ to remove elements from a List
...ly need to do it based on another collection, I'd use a HashSet, RemoveAll and Contains:
var setToRemove = new HashSet<Author>(authors);
authorsList.RemoveAll(x => setToRemove.Contains(x));
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What are the complexity guarantees of the standard containers?
Apparently ;-) the standard containers provide some form of guarantees.
3 Answers
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Printing the correct number of decimal points with cout
I have a list of float values and I want to print them with cout with 2 decimal places.
12 Answers
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Pass column name in data.table using variable [duplicate]
...n following example, I am creating a data table having column name ‘x’ and ‘v’
1 Answer
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