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Function pointers, Closures, and Lambda
I am just now learning about function pointers and, as I was reading the K&R chapter on the subject, the first thing that hit me was, "Hey, this is kinda like a closure." I knew this assumption is fundamentally wrong somehow and after a search online I didn't find really any analysis of this compari...
How to get a Color from hexadecimal Color String
...olor class method:
public static int parseColor (String colorString)
From Android documentation:
Supported formats are: #RRGGBB #AARRGGBB 'red', 'blue', 'green', 'black', 'white', 'gray', 'cyan', 'magenta', 'yellow', 'lightgray', 'darkgray'
AndroidX: String.toColorInt()
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Compare two objects in Java with possible null values
...Why not just change the String types to Objects - making it more generic? And then it is the same as what you will get if you move to Java 7.
– Tom
Nov 7 '13 at 18:31
3
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What is the right way to override a setter method in Ruby on Rails?
I am using Ruby on Rails 3.2.2 and I would like to know if the following is a "proper"/"correct"/"sure" way to override a setter method for a my class attribute.
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Read the package name of an Android APK
I need to get the package name of an Android APK. I have tried to unzip the APK and read contents of AndroidManifest.xml , but seems it's not a text file.
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How to swap files between windows in VIM?
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There are a few useful commands built in which give you a certain amount of control, but it's not comprehensive. The main ones are:
Ctrl-W, r (i.e. hold CTRL, press W, release CTRL, press r) - which rotates the windows (The first window becomes the ...
ng-app vs. data-ng-app, what is the difference?
... It seems like such a waste of CPU cycles to manually strip off data- and x-. Why can't the HTML validation rules be changed to accept ng- stuff?
– DaveAlger
May 13 '15 at 14:43
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lsof survival guide [closed]
lsof is an increadibly powerful command-line utility for unix systems. It lists open files, displaying information about them. And since most everything is a file on unix systems, lsof can give sysadmins a ton of useful diagnostic data.
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Dump Mongo Collection into JSON format
...) which can dump a collection. This utility uses the native libmongoclient and is likely the fastest method.
mongoexport -d <database> -c <collection_name>
Also helpful:
-o: write the output to file, otherwise standard output is used (docs)
--jsonArray: generates a valid json docume...
from list of integers, get number closest to a given value
...s O(log n) time (note however checking if a list is already sorted is O(n) and sorting is O(n log n).)
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