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Why do variable names often start with the letter 'm'? [duplicate]
Looking at the Android tutorials such as the Notepad tutorial , I noticed that almost all variables are named starting with the letter 'm'. What convention is this, and where does it originate from?
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Difference between freeze and seal
I just heard about the JavaScript methods freeze and seal , which can be used to make any Object immutable.
8 Answers
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Why can't I push to this bare repository?
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I'm doing sudo apt-get upgrade git-core and sudo apt-get upgrade git and it think no update is necessary. git --version returns 1.7.3.1. Any idea what's missing? I admit currently apt-get update doesn't work for me, but it did not too long ago.
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How to get users to read error messages?
...ind yourself at a high risk that users will not read your carefully worded and enlightening error messages, but just click on the first button available with a shrug of frustration.
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How do I dynamically assign properties to an object in TypeScript?
... string]: any} = {};
LooseObject can accept fields with any string as key and any type as value.
obj.prop = "value";
obj.prop2 = 88;
The real elegance of this solution is that you can include typesafe fields in the interface.
interface MyType {
typesafeProp1?: number,
requiredProp1: string...
Finding what branch a Git commit came from
...e commit was made, the best you can do in this case is examine the reflogs and find when the commit was first introduced to your repository; with any luck, you fetched the branch it was committed to. This is a bit more complex, because you can't walk both the commit tree and reflogs simultaneously. ...
What goes into the “Controller” in “MVC”?
I think I understand the basic concepts of MVC - the Model contains the data and behaviour of the application, the View is responsible for displaying it to the user and the Controller deals with user input. What I'm uncertain about is exactly what goes in the Controller.
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IntelliJ: Never use wildcard imports
... obvious why you'd want to disable this: To force IntelliJ to include each and every import individually. It makes it easier for people to figure out exactly where classes you're using come from.
Click on the Settings "wrench" icon on the toolbar, open "Imports" under "Code Style", and check the "U...
The way to check a HDFS directory's size?
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Prior to 0.20.203, and officially deprecated in 2.6.0:
hadoop fs -dus [directory]
Since 0.20.203 (dead link) 1.0.4 and still compatible through 2.6.0:
hdfs dfs -du [-s] [-h] URI [URI …]
You can also run hadoop fs -help for more info and...
Detect Windows version in .net
...n't explicitly state that your exe assembly is compatible with Windows 8.1 and Windows 10.0, System.Environment.OSVersion will return Windows 8 version, which is 6.2, instead of 6.3 and 10.0! Source: here.
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