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Best data type to store money values in MySQL
...Not being an accountant... but running a small biz in the UK... I remember reading somewhere a long time ago that currency figures should be stored to 4 decimals even for £, $, etc. so that certain calculations might actually use the last 2 decimal places for certain obscure accounting contexts. W...
What are Aggregates and PODs and how/why are they special?
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How to read:
This article is rather long. If you want to know about both aggregates and PODs (Plain Old Data) take time and read it. If you are interested just in aggregates, read only the first part. If you are interested only in ...
How do I get the first n characters of a string without checking the size or going out of bounds?
...);
Opinion: while this solution is "neat", I think it is actually less readable than a solution that uses if / else in the obvious way. If the reader hasn't seen this trick, he/she has to think harder to understand the code. IMO, the code's meaning is more obvious in the if / else version. Fo...
Real world use cases of bitwise operators [closed]
...s. ACLs are a good example; if you have let's say 4 discrete permissions (read, write, execute, change policy), it's better to store this in 1 byte rather than waste 4. These can be mapped to enumeration types in many languages for added convenience.
Communication over ports/sockets
Always involve...
Setting Authorization Header of HttpClient
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@lacripta, This is true but if you read the last 2 sentence I say its best practice to reuse HttpClient for exactly this reason but I think it is out of scope for this question.
– Florian Schaal
Aug 13 '18 at 16:40
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HashMap and int as key
... will automatically autobox your int primitive values to Integer objects.
Read more about autoboxing from Oracle Java documentations.
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New to MongoDB Can not run command mongo
... This should be the answer - it worked and was more helpful then "Read the documentation".
– Dan
Aug 17 '12 at 21:46
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How Python web frameworks, WSGI and CGI fit together
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Note that mod_wsgi can work in either mode: embedded or daemon.
When you read up on mod_fastcgi, you'll see that Django uses flup to create a WSGI-compatible interface from the information provided by mod_fastcgi. The pipeline works like this.
Apache -> mod_fastcgi -> FLUP (via FastCGI pro...
Filter rows which contain a certain string
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The answer to the question was already posted by the @latemail in the comments above. You can use regular expressions for the second and subsequent arguments of filter like this:
dplyr::filter(df, !grepl("RTB",TrackingPixel))
Since you have not provided t...
Opening a folder in explorer and selecting a file
...he above approach did not work because the file contains a comma. If I had read Kaganar's comment, it would have saved me a hour of work. I urge Samuel Yang to modify above code to: string argument=@"/select"+"\"" + filePath+"\""
– Wayne Lo
Jan 6 '16 at 19:12
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