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Is there a generator version of `string.split()` in Python?
...rsion of str.split()
:param source:
source string (unicode or bytes)
:param sep:
separator to split on.
:param regex:
if True, will treat sep as regular expression.
:returns:
generator yielding elements of string.
"""
if sep is None:
...
python list by value not by reference [duplicate]
... a general understanding, it seems to be like the same problem encountered by the op at the second layer. How does it work internally?
– AsheKetchum
Feb 21 '17 at 15:59
...
How do multiple clients connect simultaneously to one port, say 80, on a server? [duplicate]
...ed" state.
For a stateful protocol (like TCP), a connection is identified by a 4-tuple consisting of source and destination ports and source and destination IP addresses. So, if two different machines connect to the same port on a third machine, there are two distinct connections because the sourc...
Ship an application with a database
...database has a lot of tables and other components. Upgrades are triggered by changing the database version number in the res/values/strings.xml file. Upgrades would then be accomplished by creating a new database externally, replacing the old database in the assets folder with the new database, sav...
Get users by name property using Firebase
...tion where I can get/set data in specific users accounts and I was tempted by Firebase.
8 Answers
...
What's the difference between unit, functional, acceptance, and integration tests? [closed]
...brings us to ...
Integration Tests
Integration tests build on unit tests by combining the units of code and testing that the resulting combination functions correctly. This can be either the innards of one system, or combining multiple systems together to do something useful. Also, another thing...
Swift - class method which must be overridden by subclass
...make a "pure virtual function" in Swift, ie. one that must be overridden by every subclass, and which, if it is not, causes a compile time error?
...
Order of items in classes: Fields, Properties, Constructors, Methods
...rties
Indexers
Methods
Structs
Classes
Within each of these groups order by access: (SA1202)
public
internal
protected internal
protected
private
Within each of the access groups, order by static, then non-static: (SA1204)
static
non-static
Within each of the static/non-static groups of fi...
Is it possible for a computer to “learn” a regular expression by user-provided examples?
Is it possible for a computer to "learn" a regular expression by user-provided examples?
10 Answers
...
How do I (or can I) SELECT DISTINCT on multiple columns?
...INCT a,b,c FROM t
is roughly equivalent to:
SELECT a,b,c FROM t GROUP BY a,b,c
It's a good idea to get used to the GROUP BY syntax, as it's more powerful.
For your query, I'd do it like this:
UPDATE sales
SET status='ACTIVE'
WHERE id IN
(
SELECT id
FROM sales S
INNER JOIN
...