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How to tell if node.js is installed or not

... further instructions. What does one really need to do? I wanted to see if it was actually working. So I executed a script called hello.js. It went as such: ...
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How can I process each letter of text using Javascript?

...follow | edited Nov 20 '19 at 11:54 ashleedawg 15.9k55 gold badges4444 silver badges7272 bronze badges ...
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Recursively counting files in a Linux directory

...ndard input. wc (short for word count) counts newlines, words and bytes on its input (docs). -l to count just newlines. Notes: Replace DIR_NAME with . to execute the command in the current folder. You can also remove the -type f to include directories (and symlinks) in the count. It's possible ...
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Is null reference possible?

... References are not pointers. 8.3.2/1: A reference shall be initialized to refer to a valid object or function. [Note: in particular, a null reference cannot exist in a well-defined program, because the only way to create such a reference would be to bind it to the “object...
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What is the difference between an interface and a class, and why I should use an interface when I ca

... Interfaces are excellent when you want to create something like it: using System; namespace MyInterfaceExample { public interface IMyLogInterface { //I want to have a specific method that I'll use in MyLogClass void WriteLog(); } public class MyCl...
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Can I specify multiple users for myself in .gitconfig?

In my ~/.gitconfig , I list my personal email address under [user] , since that's what I want to use for Github repos. 20...
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How might I convert a double to the nearest integer value?

... Use Math.round(), possibly in conjunction with MidpointRounding.AwayFromZero eg: Math.Round(1.2) ==> 1 Math.Round(1.5) ==> 2 Math.Round(2.5) ==> 2 Math.Round(2.5, MidpointRounding.AwayFromZero) ==> 3 ...
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self referential struct definition?

I haven't been writing C for very long, and so I'm not sure about how I should go about doing these sorts of recursive things... I would like each cell to contain another cell, but I get an error along the lines of "field 'child' has incomplete type". What's up? ...
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Multiple left-hand assignment with JavaScript

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How to save all the variables in the current python session?

I want to save all the variables in my current python environment. It seems one option is to use the 'pickle' module. However, I don't want to do this for 2 reasons: ...