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Reading GHC Core
...olymorphism and operational readings of Core.
Related material that can aid understanding:
The GHC -fext-core output
I spent a lot of time learning Core by reading GHC source. Some is described in my undergraduate thesis from 2002, from page 16.
From using the ghc-core tool, to generate Core in ...
JOIN two SELECT statement results
...
This works well, though I didn't specify that I want a LEFT JOIN so that records show up even if they have 0 late tasks.
– sylverfyre
May 10 '12 at 17:25
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How to get the contents of a webpage in a shell variable?
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If you have LWP installed, it provides a binary simply named "GET".
$ GET http://example.com
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<HTML>
<HEAD>
<META http-equiv="Content-Type" content="text/html; charset=utf...
Font scaling based on width of container
... relative to the size of the initial containing block. When the height or width of the initial containing block is changed, they are scaled accordingly. However, when the value of overflow on the root element is auto, any scroll bars are assumed not to exist.
The values are:
vw (% of the viewpor...
Creating a new column based on if-elif-else condition
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To formalize some of the approaches laid out above:
Create a function that operates on the rows of your dataframe like so:
def f(row):
if row['A'] == row['B']:
val = 0
elif row['A'] > row['B']:
val = 1
else:
val = -1
r...
Checking if output of a command contains a certain string in a shell script
...p;> /dev/null
if [ $? == 0 ]; then
echo "matched"
fi
which is done idiomatically like so:
if ./somecommand | grep -q 'string'; then
echo "matched"
fi
and also:
./somecommand | grep -q 'string' && echo 'matched'
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How to pass macro definition from “make” command line arguments (-D) to C source code?
...makefile" using the option :
-Dname=value. The definition is accessible inside the makefile.
6 Answers
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Rails migrations: self.up and self.down versus change
... rollback? It's not possible, so you need to define the down method.
As said, I suggest you to read the Rails Migrations Guide.
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Nginx not picking up site in sites-enabled?
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I had the same problem. It was because I had accidentally used a relative path with the symbolic link.
Are you sure you used full paths, e.g.:
ln -s /etc/nginx/sites-available/example.com.conf /etc/nginx/sites-enabled/example.com.conf
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Is it possible for intellij to organize imports the same way as in Eclipse?
...on a project where all the team members are using Eclipse and I'm the only IDEA user. This creates a lot of noise from imports rearrangements. The order in which eclipse imports is: Java, Javax, Org, Com, everything else in alphabetical order. Is it possible to configure IDEA to follow these rules?
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