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How can I quantify difference between two images?
... "compare the pixels one by one". What does that mean? Should the test fail if ONE of the 64^2 pixel-per-pixel tests fails?
– Federico A. Ramponi
Oct 15 '08 at 13:25
...
What guidelines for HTML email design are there? [closed]
...'t even think about flash, Javascript, SVG, canvas, or anything like that.
Test, a lot. Make sure you test in a recent Outlook (things have changed a lot! It now uses Word as its HTML rendering engine, and it's crippled: Word 2007 HTML/CSS support). Gmail is pretty finicky also. Surprisingly Yahoo's...
How to dynamically compose an OR query filter in Django?
...jects.all(). Easy to mitigate by returning Article.objects.none() for that test though.
– Wil
Oct 1 '18 at 14:33
2
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Passing a string with spaces as a function argument in bash
...
Simple solution that worked for me -- quoted $@
Test(){
set -x
grep "$@" /etc/hosts
set +x
}
Test -i "3 rb"
+ grep -i '3 rb' /etc/hosts
I could verify the actual grep command (thanks to set -x).
...
Checking whether something is iterable
... @Gil You're absolutely right, oops! I should have copy-pasted tested code instead of typing directly in a post.
– Domino
Nov 6 '18 at 23:20
...
Should I use #define, enum or const?
...e a mask to select records in certain states. Create an inline function to test if the value of the type is valid for your purpose; as a state marker vs a state mask. This will catch bugs as the typedef is just an int and a value such as 0xDEADBEEF may be in your variable through uninitialised or mi...
Rank function in MySQL
...ows the variable initialization without requiring a separate SET command.
Test case:
CREATE TABLE person (id int, first_name varchar(20), age int, gender char(1));
INSERT INTO person VALUES (1, 'Bob', 25, 'M');
INSERT INTO person VALUES (2, 'Jane', 20, 'F');
INSERT INTO person VALUES (3, 'Jack', ...
Bash: infinite sleep (infinite blocking)
...ndow manager using /usr/bin/mywm . Now, if I kill my WM (in order to f.e. test some other WM), X will terminate too because the .xinitrc script reached EOF.
So I added this at the end of my .xinitrc :
...
What Automatic Resource Management alternatives exist for Scala?
...xpression:
import resource._
for(input <- managed(new FileInputStream("test.txt")) {
// Code that uses the input as a FileInputStream
}
2) Monadic-style
import resource._
import java.io._
val lines = for { input <- managed(new FileInputStream("test.txt"))
val bufferedRead...
How to use gitignore command in git
...an also ignore a whole folder. for example you want to ignore
folder named test. Then just write test/ in the file.
just create a .gitignore file and write in whatever you want to ignore
a sample gitignore file would be:
# NPM packages folder.
node_modules
# Build files
dist/
# lock files
yarn....