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How to listen for changes to a MongoDB collection?
...tricks. The key here is the oplog.
When you run MongoDB in a Replica Set, all of the MongoDB actions are logged to an operations log (known as the oplog). The oplog is basically just a running list of the modifications made to the data. Replicas Sets function by listening to changes on this oplog a...
Can the Unix list command 'ls' output numerical chmod permissions?
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JB.JB.
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How do I prevent 'git diff' from using a pager?
...onal paging based on the amount of content:
git config --global --replace-all core.pager "less -F -X"
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Android: Clear Activity Stack
... navigates to login Screen and from there user can exit by cancel button (calling system.exit(0) )
11 Answers
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LINQ to SQL Left Outer Join
... how this crazy syntax works? I fail to see how any of those keywords magically makes it a left join. What does the "into sr" do? Linq frustrates me sometimes :)
– Joe Phillips
Apr 7 '14 at 21:29
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How to read from a file or STDIN in Bash?
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The following solution reads from a file if the script is called
with a file name as the first parameter $1 otherwise from standard input.
while read line
do
echo "$line"
done < "${1:-/dev/stdin}"
The substitution ${1:-...} takes $1 if defined otherwise
the file name of t...
I lose my data when the container exits
...it. Try this:
sudo docker pull ubuntu
sudo docker run ubuntu apt-get install -y ping
Then get the container id using this command:
sudo docker ps -l
Commit changes to the container:
sudo docker commit <container_id> iman/ping
Then run the container:
sudo docker run iman/ping ping w...
Learning Ant path style
...hes com/test.jsp but also com/tast.jsp or com/txst.jsp
com/*.jsp - matches all .jsp files in the com directory
com/**/test.jsp - matches all test.jsp files underneath the com path
org/springframework/**/*.jsp - matches all .jsp files underneath the org/springframework path
org/**/servlet/bla.jsp - m...
How to get object size in memory? [duplicate]
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Lists in C# are preallocated to whatever sizes the framework designers decided to go with, and then increased when needed. By default it's probably something like 10 elements. So you won't notice any size difference until you add enough element...
Get String in YYYYMMDD format from JS date object?
... won't need the rightNow variable around, you can wrap new Date and get it all back in a single line: (new Date()).toISOString().slice(0,10).replace(/-/g,"")
– BigBlueHat
Sep 26 '13 at 17:43
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