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How to remove the lines which appear on file B from another file A?
...le1 file2 > file3 will output contents in file1 not in file2, to file3. And then mv file3 file1 would finally clear redundant contents in file1.
– Spectral
Jul 17 '14 at 20:48
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How do I get Windows to go as fast as Linux for compiling C++?
...ng, you're not going to get more than partisan comments (which I won't do) and speculation (which is what I'm going to try).
File system - You should try the same operations (including the dir) on the same filesystem. I came across this which benchmarks a few filesystems for various parameters.
Ca...
Why are elementwise additions much faster in separate loops than in a combined loop?
Suppose a1 , b1 , c1 , and d1 point to heap memory and my numerical code has the following core loop.
10 Answers
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How to make execution pause, sleep, wait for X seconds in R?
...anguages, there is a sleep function, but ?sleep references a data set. And ?pause and ?wait don't exist.
2 Answers
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Insert text with single quotes in PostgreSQL
...g literals
Escaping single quotes ' by doubling them up -> '' is the standard way and works of course:
'user's log' -- incorrect syntax (unbalanced quote)
'user''s log'
In old versions or if you still run with standard_conforming_strings = off or, generally, if you prepend your string with...
Making a triangle shape using xml definitions?
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In this post I describe how to do it. And here is the XML defining triangle:
<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android" >
<item>
<rotate
android:fromD...
How to step through Python code to help debug issues?
...va/C# you can easily step through code to trace what might be going wrong, and IDE's make this process very user friendly.
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Using jquery to get element's position relative to viewport
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The easiest way to determine the size and position of an element is to call its
getBoundingClientRect() method. This method returns element positions in viewport coordinates. It expects no arguments and returns an object with
properties left, right, top, and bott...
How to declare global variables in Android?
I am creating an application which requires login. I created the main and the login activity.
17 Answers
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How can I get the console logs from the iOS Simulator?
...ut, so you can see the logs mixed up with system logs.
Open the Terminal and type: tail -f /var/log/system.log
Then run the simulator.
EDIT:
This stopped working on Mavericks/Xcode 5. Now you can access the simulator logs in its own folder: ~/Library/Logs/iOS Simulator/<sim-version>/syste...