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How to find out which JavaScript events fired?
... that is a bit different but surprisingly awesome is Visual Event:
http://www.sprymedia.co.uk/article/Visual+Event+2
It highlights all of the elements on a page that have been bound and has popovers showing the functions that are called. Pretty nifty for a bookmark! There's a Chrome plugin as well...
Turning Sonar off for certain code
Is it possible to turn off sonar ( www.sonarsource.org ) measurements for specific blocks of code, which one doesn't want to be measured?
...
Compare two data.frames to find the rows in data.frame 1 that are not present in data.frame 2
..., this is one of the best summaries I've seen put together to date: http://www.vertabelo.com/blog/technical-articles/sql-joins
But back to this question - here are the results for the setdiff() code when using the OP's data:
> a1
a b
1 1 a
2 2 b
3 3 c
4 4 d
5 5 e
> a2
a b
1 1 a
2 2 b
3 ...
What's the difference between integer class and numeric class in R
...o append the letter L.
> class(1:5)
[1] "integer"
Reference: https://www.quora.com/What-is-the-difference-between-numeric-and-integer-in-R
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Export CSS changes from inspector (webkit, firebug, etc)
...is product on SO before (I'm not affiliated with them in any way).
http://www.skybound.ca/
Excellent product. Sounds like exactly what you're looking for and much more.
EDIT: Several other answers here have mentioned Google Chrome's ability to link to your local files (which is very very cool). C...
Provide an image for WhatsApp link sharing
...to the current webpage address
<meta property="og:url" content="https://www.example.com/webpage/" />
Step 5: og:description
Maximum 65 characters
<meta property="og:description" content="description of your website/webpage">
Step 6: og:image
Image(JPG or PNG) with a size less than 30...
What is meant by Ems? (Android TextView)
...ent: 1.5em and margin: 1em are extremely common in
CSS.
Source:https://www.w3.org/Style/Examples/007/units
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Verify a certificate chain using openssl verify
...ck' 0
serve()
{
kick
PID=
openssl s_server -key "$KEY" -cert "$CRT" "$@" -www &
PID=$!
sleep .5 # give it time to startup
}
check()
{
while read -r line
do
case "$line" in
'Verify return code: 0 (ok)') return 0;;
'Verify return code: '*) return 1;;
# *) echo "::: $line :...
When does Java's Thread.sleep throw InterruptedException?
... From Don't swallow interrupts
See the entire paper here:
http://www.ibm.com/developerworks/java/library/j-jtp05236/index.html?ca=drs-
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How to scale threads according to CPU cores?
...mework has been added to Java SE 7. Below are few more references:
http://www.ibm.com/developerworks/java/library/j-jtp11137/index.html
Article by Brian Goetz
http://www.oracle.com/technetwork/articles/java/fork-join-422606.html
...