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Can I use __init__.py to define global variables?
... It's asking about variables, not constants. How python treats variable inside package? What If variable inside package has been changed?
– TomSawyer
Dec 22 '17 at 20:13
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Why do you need to create a cursor when querying a sqlite database?
...only be used to fetch data from the DBMS into an
application but also to identify a row in a table to be updated or
deleted. The SQL:2003 standard defines positioned update and
positioned delete SQL statements for that purpose. Such statements do
not use a regular WHERE clause with predicate...
Any difference between First Class Function and High Order Function
...
@Simon I think the key to avoiding confusion is to remember that a language either has first-class functions (you can also talk about "first-class" other things, like first-class classes, etc), or it doesn't. So you never talk about a particular function...
Equivalent of varchar(max) in MySQL?
...) and not varchar(MAX_SIZE_OF_A_COLUMN).
MySql does not have an equivalent idiom.
In order to get the same amount of storage as a varchar(max) in MySql you would still need to resort to a BLOB column type. This article discusses a very effective method of storing large amounts of data in MySql effi...
Maximum Length of Command Line String
...in7. I'm not sure what the 8191 limit refers to, but I haven't found any evidence of it yet.
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How to create default value for function argument in Clojure
...Integer/parseInt s base)))
Note that assuming false and nil are both considered non-values, (if (nil? base) 10 base) could be shortened to (if base base 10), or further to (or base 10).
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What does iota of std::iota stand for?
...nguage APL.
In his Turing Award lecture, Ken Iverson (inventor of APL) said this:
For example, the integer function denoted by ι produces a vector of the first n integers when applied to the argument n, …
That ι is the lower-case Greek letter iota.
In the quote above, I typed ι, U+03B9...
`levels
...here was no reassignment of dat.
In these circumstances, within() is the ideal function to use. You would naturally wish to write
levels(product) <- bar
in R but of course product doesn't exist as an object. within() gets around this because it sets up the environment you wish to run your R ...
How to capture stdout output from a Python function call?
...ith redirect_stdout(sys.stderr):
help(pow)
Note that the global side effect on sys.stdout means that this context
manager is not suitable for use in library code and most threaded
applications. It also has no effect on the output of subprocesses.
However, it is still a useful approac...
API Keys vs HTTP Authentication vs OAuth in a RESTful API
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It depends on your needs. Do you need:
Identity – who claims to be making an API request?
Authentication – are they really who they say they are?
Authorization – are they allowed to do what they are trying to do?
or all three?
If you just need to identif...