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Python dictionary: Get list of values for list of keys
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Converting the OP's list to a set at least makes it linear, but it's still linear on the wrong data structure as well as losing order. Consider the case of a 10k dictionary and 2 keys in mykeys. Your solution makes 10k set ...
Passing an array to a query using a WHERE clause
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for newbies to PHP like myself, can someone explain, or point me to a resource to explain, why this is prone to injection and how this should be done correctly to prevent that? What if the list of IDs is generated from a query immediately before this next query is run, is that stil...
Java: Clear the console
....exec, as the well-known command cls is builtin to Windows’ command line interpreter.
When launching a new process via Runtime.exec, the standard output gets redirected to a pipe which the initiating Java process can read. But when the output of the cls command gets redirected, it doesn’t clear ...
How to avoid “ConcurrentModificationException” while removing elements from `ArrayList` while iterat
... I consider it a good habit to declare as final all variables that are not intended to be reassigned. I only wish "final" were the default.
– Eric Stein
Apr 19 '17 at 14:27
ad...
Temporarily disable auto_now / auto_now_add
...ject.com/en/1.9/topics/db/queries/… Be aware that the update() method is converted directly to an SQL statement. It is a bulk operation for direct updates. It doesn’t run any save() methods on your models, or emit the pre_save or post_save signals (which are a consequence of calling save()), or ...
How is __eq__ handled in Python and in what order?
... A.__eq__, since it exists. Its code includes self.value == other. Since int's don't know how to compare themselves to B's, Python tries invoking B.__eq__ to see if it knows how to compare itself to an int.
If you amend your code to show what values are being compared:
class A(object):
def _...
Is it possible to style a select box? [closed]
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I've seen some jQuery plugins out there that convert <select>'s to <ol>'s and <option>'s to <li>'s, so that you can style it with CSS. Couldn't be too hard to roll your own.
Here's one: https://gist.github.com/1139558 (Used to he here, but it lo...
How to get the size of a JavaScript object?
... Can't use with circular structures VM1409:1 Uncaught TypeError: Converting circular structure to JSON :( still useful though
– givanse
Oct 14 '16 at 18:24
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How do I calculate the date in JavaScript three months prior to today?
... This is a sick answer... Where i'm going to get 2012,0,15 from? Convert an existing month -1 ?
– Alex G
Aug 8 '15 at 2:56
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How do I delete from multiple tables using INNER JOIN in SQL server
...le. Something like:
begin transaction;
declare @deletedIds table ( id int );
delete from t1
output deleted.id into @deletedIds
from table1 as t1
inner join table2 as t2
on t2.id = t1.id
inner join table3 as t3
on t3.id = t2.id;
delete from t2
from table2 as ...