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Is a RelativeLayout more expensive than a LinearLayout?
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In a talk at Google I/O 2013 (Writing Custom Views for Android), Romain Guy clarified the misunderstanding that caused everyone to start using RelativeLayouts for everything. A RelativeLayout always has to do two measure passes. Overall it is negligible as long as your view hiera...
Having a private branch of a public repo on GitHub?
...ode)
You can bring in changes to your public repo using 'git fetch public' and then merge them locally and push to your private repo (origin remote).
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What's “tools:context” in Android layout files?
...ge of the activity, such as what the layout theme should be in the preview and where to insert onClick handlers when you make those from a quickfix
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Recommended way to insert elements into map [duplicate]
...lement exists. If it doesn't then it creates one using default constructor and returns a reference (or const reference to it).
Because map containers do not allow for duplicate key values, the insertion operation checks for each element inserted whether another element exists already in the contai...
Read binary file as string in Ruby
I need an easy way to take a tar file and convert it into a string (and vice versa). Is there a way to do this in Ruby? My best attempt was this:
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Python : List of dict, if exists increment a dict value, if not append a new dict
...en easier:
from collections import defaultdict # available in Python 2.5 and newer
urls_d = defaultdict(int)
for url in list_of_urls:
urls_d[url] += 1
If you access the defaultdict using a key, and the key is not already in the defaultdict, the key is automatically added with a default valu...
How do I use a file grep comparison inside a bash if/else statement?
...t status is 0 if any line was selected, 1 otherwise;
if any error occurs and -q was not given, the exit status is 2.
if grep --quiet MYSQL_ROLE=master /etc/aws/hosts.conf; then
echo exists
else
echo not found
fi
You may want to use a more specific regex, such as ^MYSQL_ROLE=master$, to avo...
How to use the 'sweep' function
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sweep() is typically used when you operate a matrix by row or by column, and the other input of the operation is a different value for each row / column. Whether you operate by row or column is defined by MARGIN, as for apply(). The values used for what I called "the other input" is defined by STA...
How to write an async method with out parameter?
...el CLR rewrite instead of a
compiler-rewrite. We examined that approach, and it had a lot going
for it, but it would ultimately have been so costly that it'd never
have happened.
A typical workaround for this situation is to have the async method return a Tuple instead.
You could re-write yo...
What is the App_Data folder used for in Visual Studio?
...hen creating a new ASP.NET application in Visual Studio, a couple of files and folders are created automatically. One of those folders is called App_Data .
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