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Extracting bits with a single multiplication
...is answer was accepted when the number of upvotes reached 127. If you have read this far, you will smile with me...
– Floris
Feb 1 '13 at 16:48
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Command to get nth line of STDOUT
... -n 2p
Using this alternative, which looks more efficient since it stops reading the input when the required line is printed, may generate a SIGPIPE in the feeding process, which may in turn generate an unwanted error message:
ls -l | sed -n -e '2{p;q}'
I've seen that often enough that I usuall...
CORS: Cannot use wildcard in Access-Control-Allow-Origin when credentials flag is true
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After reading this documentation: github.com/expressjs/corsuse i using this config: app.use(cors({credentials: true, origin: 'localhost:3001'})); is working for me.
– allel
Feb 5 '16 at 8:...
Convert Set to List without creating new List
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@imrantariq: What you are requesting is impossible. read my edit for more details.
– amit
Jan 17 '12 at 10:09
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Eclipse / Android : “Errors running builder 'Android Pre Compiler' on project…”
... SDK manager from Google. Clear instructions can be found here and you can read all the background add your voice to the angry mob of developers here.
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How would you do a “not in” query with LINQ?
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@Echostorm (and others reading), if you do a Select to Anonymous object, the HashCode will be determined by the property values; list1.Select(item => new { Property1 = item.Property1, Property2 = item.Property2 }).Except(list2.Select( item =>...
python design patterns [closed]
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You may also wish to read this article (select the .pdf file), which discusses Design Patterns in dynamic object oriented languages (i.e. Python). To quote the page:
This paper explores how the patterns from the "Gang of Four", or "GOF" book,...
What does the Subversion status symbol “~” mean?
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In case anyone reading this thread has the same problem: this happened to me and the reason for the '~' status was that I had some symbolic links in the repository, which had been overwritten by standard files by a 'sed -i' operation. I rec...
convert a JavaScript string variable to decimal/money
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To quote @PhilipWhitehouse "Please, to anyone reading this in the future, do not use float to store currency. You will loose precision and data. You should store it as a integer number of cents (or pennies etc.) and then convert prior to output.". Source: stackoverflow.c...
Ruby convert Object to Hash
...attribute_names.each_with_object({}) { |name, attrs| attrs[name] = read_attribute(name) } . See here: github.com/rails/rails/blob/master/activerecord/lib/…
– Chris Kimpton