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Sort a list of tuples by 2nd item (integer value) [duplicate]
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You can also add multiple keys as a tuple, if you want one as reversed you can add a negative sign, this will sort using the first element first and then second element: sorted(some_list, lambda x: (x[0], -x[1],))
– Seraf
Mar 10 '19 at 17:34...
How to check if PHP array is associative or sequential?
... all arrays as associative, so there aren't any built in functions. Can anyone recommend a fairly efficient way to check if an array contains only numeric keys?
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any tool for java object to object mapping? [closed]
...r is a Java Bean to Java Bean
mapper that recursively copies data
from one object to another. Typically,
these Java Beans will be of different
complex types.
Dozer supports simple property
mapping, complex type mapping,
bi-directional mapping,
implicit-explicit mapping, as well as...
Best way to test SQL queries [closed]
...compose a complicated query.
In the example, because each view adds only one transformation, each can be independently tested to find errors, and the tests are simple.
Here's the base table in the example:
create table month_value(
eid int not null, month int, year int, value int );
This...
Find size of an array in Perl
...decade). $[ is deprecated. Using $[ issues a deprecation warning even when one doesn't turn on warnings. Assigning anything but zero to $[ will be an error in 5.16. Can we stop mentioning $[ already?
– ikegami
Sep 13 '11 at 19:05
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Create a tar.xz in one command
I am trying to create a .tar.xz compressed archive in one command. What is the specific syntax for that?
5 Answers
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Grouping functions (tapply, by, aggregate) and the *apply family
...h of them, though, that beginning useRs may have difficulty deciding which one is appropriate for their situation or even remembering them all. They may have a general sense that "I should be using an *apply function here", but it can be tough to keep them all straight at first.
Despite the fact (n...
Can you have multiple $(document).ready(function(){ … }); sections?
If I have a lot of functions on startup do they all have to be under one single:
11 Answers
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What would cause an algorithm to have O(log n) complexity?
...imes can you divide n by two before you get a number less than or equal to one? For 16, we have that
16 / 2 = 8
8 / 2 = 4
4 / 2 = 2
2 / 2 = 1
Notice that this ends up taking four steps to complete. Interestingly, we also have that log2 16 = 4. Hmmm... what about 128?
128 / 2 = 64
64 / 2 ...
Trust Anchor not found for Android SSL Connection
... This is ok for working with a self-generated cert, but for one (like the OP's) which has a valid chain back to the root CA's it is just a workaround for a badly configured server - see my answer.
– Stevie
Apr 30 '13 at 14:43
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