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java: ArrayList - how can i check if an index exists?
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The method arrayList.size() returns the number of items in the list - so if the index is greater than or equal to the size(), it doesn't exist.
if(index >= myList.size()){
//index not exists
}else{
// index exists
}
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How to add extension methods to Enums
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According to this site:
Extension methods provide a way to write methods for existing classes in a way other people on your team might actually discover and use. Given that enums are classes like any other it shouldn’t be too surprising that...
Why do we copy then move?
...somewhere in which someone decided to copy an object and subsequently move it to a data member of a class. This left me in confusion in that I thought the whole point of moving was to avoid copying. Here is the example:
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What parameters should I use in a Google Maps URL to go to a lat-lon?
I would like to produce a url for Google Maps that goes to a specific latitude and longitude. Now, I generate a url such as this:
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How to change time in DateTime?
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You can't change a DateTime value - it's immutable. However, you can change the variable to have a new value. The easiest way of doing that to change just the time is to create a TimeSpan with the relevant time, and use the DateTime.Date property:
DateTime s =...
Why doesn't Console.Writeline, Console.Write work in Visual Studio Express?
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Console.WriteLine writes your output to the console window opened by your application (think black window with white text that appears when you open the Command Prompt.) Try System.Diagnostics.Debug.WriteLine instead.
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How do I update devDependencies in NPM?
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To update package.json in addition to the local modules, run
npm update --save-dev
Alternatively, the same command to save time
npm update -D
You can view the full detail of update, or any command for that matter through
npm help <cmd>
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How can I tell if one commit is a descendant of another commit?
With Git, how can I tell if one commit in my branch is a descendant of another commit?
8 Answers
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How can I see what I am about to push with git?
Is there a way to see what would be pushed if I did a git push command?
13 Answers
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Rails new vs create
Why is there a need to define a new method in RESTful controller, follow it up with a create method?
4 Answers
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