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How can I reverse a list in Python?
...ou can make use of the reversed function for this as:
>>> array=[0,10,20,40]
>>> for i in reversed(array):
... print(i)
Note that reversed(...) does not return a list. You can get a reversed list using list(reversed(array)).
...
What do (lambda) function closures capture?
...reate a new scope each time you create the lambda:
>>> adders = [0,1,2,3]
>>> for i in [0,1,2,3]:
... adders[i] = (lambda b: lambda a: b + a)(i)
...
>>> adders[1](3)
4
>>> adders[2](3)
5
The scope here is created using a new function (a lambda, for bre...
psql: FATAL: Peer authentication failed for user “dev”
...
Try:
psql -U user_name -h 127.0.0.1 -d db_name
where
-U is the database user name
-h is the hostname/IP of the local server, thus avoiding Unix domain sockets
-d is the database name to connect to
This is then evaluated as a "network" connection by ...
Unable to copy ~/.ssh/id_rsa.pub
...
DISPLAY=:0 xclip -sel clip < ~/.ssh/id_rsa.pub didn't work for me (ubuntu 14.04), but you can use :
cat ~/.ssh/id_rsa.pub
to get your public key
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...
How to check if a float value is a whole number
...to find the largest cube root that is a whole number, that is less than 12,000.
13 Answers
...
Javascript web app and Java server, build all in Maven or use Grunt for web app?
...akes about ~35s when using Rhino and ~15s using Wro4j's Node support on a 2013 iMac with 16G of RAM. Using Grunt+Node takes about 2s on my puny MacBook Air.
JAWR - The integrations and feature list are pretty good but the docs aren't great and writing your own plugins can be a little tricky. When I ...
Should I pass an std::function by const-reference?
... Yakk - Adam NevraumontYakk - Adam Nevraumont
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How to declare a structure in a header that is to be used by multiple files in c?
...
140
if this structure is to be used by some other file func.c how to do it?
When a type is used in a...
Picking a random element from a set
...eal life, the Random object should be rather more shared than this
int i = 0;
for(Object obj : myhashSet)
{
if (i == item)
return obj;
i++;
}
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Commenting in a Bash script inside a multiline command
...
207
This will have some overhead, but technically it does answer your question:
echo abc `#Put you...