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Pythonic way to check if a file exists? [duplicate]
...en(fd, 'w')
This should open your file for writing if it doesn't exist already, and return a file-object. If it does exists, it will print "Ooops" and return None (untested, and based solely on reading the python documentation, so might not be 100% correct).
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What is the difference between a thread and a fiber?
What is the difference between a thread and a fiber? I've heard of fibers from ruby and I've read heard they're available in other languages, could somebody explain to me in simple terms what is the difference between a thread and a fiber.
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How do I remove  from the beginning of a file?
...ave a CSS file that looks fine when I open it using gedit , but when it's read by PHP (to merge all the CSS files into one), this CSS has the following characters prepended to it: 
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How to see query history in SQL Server Management Studio
...e queries executed in SSMS by default. There are several options though.
Reading transaction log – this is not an easy thing to do because its in proprietary format. However if you need to see queries that were executed historically (except SELECT) this is the only way.
You can use third party...
How to merge 2 JSON objects from 2 files using jq?
...:"baz","a":0}' | jq -s add
{
"a": 0,
"b": "bar",
"c": "baz"
}
This reads all JSON texts from stdin into an array (jq -s does that) then it "reduces" them.
(add is defined as def add: reduce .[] as $x (null; . + $x);, which iterates over the input array's/object's values and adds them. Obje...
In practice, what are the main uses for the new “yield from” syntax in Python 3.3?
...at sending data to a generator even means, you need to drop everything and read about coroutines first—they're very useful (contrast them with subroutines), but unfortunately lesser-known in Python. Dave Beazley's Curious Course on Coroutines is an excellent start. Read slides 24-33 for a quick pr...
How to hide reference counts in VS2013?
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That would be it! Just a note to anyone else who might be reading this: unchecking "Show References" alone will not get rid of the giant gap where the "references" text normally is. Unchecking "Enable Code Information Indicators" does get rid of the gap, however.
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DDD - the rule that Entities can't access Repositories directly
...ample: Chatroom user is not allowed to change their name to a name thats already been used by someone else. I'd like that rule to be built into by ChatUser entity, but its not very easy to do if you can't hit the repository from there. So what should I do?
– codeulike
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What is the best way to implement constants in Java? [closed]
...sn't worth the possible confusion as to where the constant came from, when reading long code, MaxSeconds.MAX_SECONDS may be easier to follow then going up and looking at the imports.
– MetroidFan2002
Sep 15 '08 at 20:35
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What are the advantages of using a schema-free database like MongoDB compared to a relational databa
...ines your schema.
A clear path to horizontal scalability.
You'll need to read more about it and play with it to get a better idea. Here's an online demo:
http://try.mongodb.org/
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