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Multi-line commands in GHCi
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To expand on Aaron Hall's answer, in version GHCi 8.4.4 at least, you don't need to use let with type declarations if you use the :{ :} style. This means you don't have to worry about adding the 4-space indentation on every subsequent line to account for let, making longer functions ...
Assign pandas dataframe column dtypes
... Be careful if you have a column that needs to be a string but contains at least one value that could be converted to an int. All it takes is one value and the entire field is converted to float64
– Michael David Watson
May 5 '15 at 20:13
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NumPy or Pandas: Keeping array type as integer while having a NaN value
...o be made with NA values in NumPy (similar to NAs in R), but it will be at least 6 months to a year before NumPy gets these features, it seems:
http://pandas.pydata.org/pandas-docs/stable/gotchas.html#support-for-integer-na
(This feature has been added beginning with version 0.24 of pandas, but no...
How does the SQL injection from the “Bobby Tables” XKCD comic work?
... the WHERE with parentheses around the arguments is rather unusual, but at least it avoids a syntax error... :-)
– PhiLho
Dec 2 '08 at 20:00
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Python naming conventions for modules
...s was the correct convention, but there is an inherent problem with it, at least it seems to me. Say I have a class called Client, and understandably I'd often make instances of it that I want to call client. But according to your convention, the module name would be client, and so I'd always have t...
How Do I Fetch All Old Items on an RSS Feed?
...ne from User Friendly which has only one item and changes every day (or at least used to do so). Hence if the feedreadere.g. crashed or lost network connection while you are away for a few days, you might loose items in your feedreader's cache. Having the proxy to fetch those feeds regularily (e.g....
How to exclude certain directories/files from git grep search
...git versions up to v2.12, when using an exclude pathspec, you must have at least one "inclusive" pathspec. In the above examples this is the ./* (recursively include everything under the current directory). In git v2.13 this restriction was lifted and git grep foobar -- ':!*.java' works without the ...
What is the purpose of global.asax in asp.net
...d code under any of the events that are listed (and created by default, at least in Visual Studio 2008):
Application_Start
Application_End
Session_Start
Session_End
Application_BeginRequest
Application_AuthenticateRequest
Application_Error
There are other events that you can also hook into, su...
What's in an Eclipse .classpath/.project file?
...e files are really needed, as m2eclipse takes care of that for you (or, at least, that's what it's supposed to be doing).
– Isaac
Dec 11 '18 at 19:57
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What is a 'semantic predicate' in ANTLR?
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// entry point of this parser: it parses an input string consisting of at least
// one number, optionally followed by zero or more comma's and numbers
parse
: number (',' number)* EOF
;
// matches a number that is between 1 and 3 digits long
number
: Digit Digit Digit
| Digit Digit
|...