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What is lexical scope?
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I understand them through examples. :)
First, lexical scope (also called static scope), in C-like syntax:
void fun()
{
int x = 5;
void fun2()
{
printf("%d", x);
}
}
Every inner level can access its outer l...
How do you uninstall all dependencies listed in package.json (NPM)?
If I have a package.json file defined in my application root and run npm install -g it will install all the dependencies defined in package.json, globablly.
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Scala: write string to file in one statement
...ding-safe. If an exception happens in write(), close will never be called, and the file won't be closed. PrintWriter also uses the default system encoding, which is very bad for portability. And finally, this approach generates a separate class specifically for this line (however, given that Scala a...
Why does volatile exist?
...s useless (The guy never sets the value! He's nuts, get rid of that code!) and my code would proceed without having acquired the semaphore, causing problems later on.
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What is the most efficient way to store a list in the Django models?
...ed as a one-to-many foreign key relationship to a Friends table? I understand that myFriends are just strings but I would think that a better design would be to create a Friend model and have MyClass contain a foreign key realtionship to the resulting table.
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asp.net mvc put controllers into a separate project
I'm just learning asp.net mvc and I'm trying to figure out how to move my controllers into a separate project. Typically when I have designed asp.net web apps before, I created one project for my models, another for my logic, and then there was the web.
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Label on the left side instead above an input field
...s itself to width:100%. Needed to override that div to 50%. Then the label and input-group (datepicker) would fit in one line. (I wish it was cleaner without override though.)
– Turbo
Nov 15 '16 at 21:17
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Convert DOS line endings to Linux line endings in Vim
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dos2unix is a commandline utility that will do this, or :%s/^M//g will if you use Ctrl-v Ctrl-m to input the ^M, or you can :set ff=unix and Vim will do it for you.
There is documentation on the fileformat setting, and the Vim wiki has a compr...
detach all packages while working in R
...nly names(sessionInfo()$loadedOnly) to explicitly attached packages first, and then detach the packages, as so.
lapply(names(sessionInfo()$loadedOnly), require, character.only = TRUE)
invisible(lapply(paste0('package:', names(sessionInfo()$otherPkgs)), detach, character.only=TRUE, unload=TRUE, force...
How can I parse a YAML file from a Linux shell script?
...sible for a non-technical user to edit (unfortunately it has to be a file) and so I wanted to use YAML. I can't find any way of parsing this from a Unix shell script however.
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