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Remove the last line from a file in Bash
... dding one byte of /dev/null onto it).
This is fast because tail starts reading from the end, and dd will overwrite the file in place rather than copy (and parse) every line of the file, which is what the other solutions do.
NOTE: This removes the line from the file in place! Make a backup or te...
Check if a given key already exists in a dictionary and increment it
...n a dictionary, how can I find out if a given key in that dictionary has already been set to a non-None value?
12 Answers
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How to make a cross-module variable?
... For one thing, it breaks people's expectations when they're reading code. "What's this 'foo' symbol being used here? Why can't I see where it's defined?"
– Curt Hagenlocher
Aug 6 '10 at 5:05
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How do I watch a file for changes?
...s which I want to watch for changes. Each time a change occurs I'd like to read the new data in to do some processing on it.
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How do you properly determine the current script directory in Python?
...I suggest setting __file__ in the globals you pass to the script so it can read that filename.
There's no other way to get the filename in execed code: as you note, the CWD may be in a completely different place.
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Archiving project in Xcode incorrectly creates multi-application bundle
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I would give you 10 stars, the nr of solutions i read till finding the one that helped. I just clicked on the files i found at step 6 and marked them in the target membership area from public to project, no need for anything.
– Cristi Băluță
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Cast List to List
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Oh. I think I need to learn how to read. I thought the original answer said that the objects in the list would be deep copied and recreated which didn't make sense to me. But I clearly missed the part where only a new list is created with the same objects.
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Git Push ERROR: Repository not found
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Check to see if you have read-write access.
The Git error message is misleading. I had a similar issue. I had been added to an existing project. I cloned it and committed a local change. I went to push and got the ERROR: Repository not found. error ...
Best way to use multiple SSH private keys on one client
...d: publickey
debug1: Trying private key: /home/example/.ssh/id_rsa
debug1: read PEM private key done: type RSA
debug1: Authentications that can continue: publickey
debug1: Trying private key: /home/example/.ssh/id_rsa_old
debug1: read PEM private key done: type RSA
....
[server ~]$
This way you do...
NoSQL (MongoDB) vs Lucene (or Solr) as your database
...ose results. So while it doesn't have general purpose map-reduce it has already written what you would be writing with map-reduce which is parallel search queries.
– chubbsondubs
Jun 14 '12 at 3:36
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