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Returning the product of a list
...sing lambda:
from operator import mul
reduce(mul, list, 1)
it is better and faster. With python 2.7.5
from operator import mul
import numpy as np
import numexpr as ne
# from functools import reduce # python3 compatibility
a = range(1, 101)
%timeit reduce(lambda x, y: x * y, a) # (1)
%timeit r...
How to customize the background color of a UITableViewCell?
I would like to customize the background (and maybe the border too) of all of the UITableViewCells within my UITableView. So far I have not been able to customize this stuff, so I have a bunch of white background cells which is the default.
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Resource interpreted as Document but transferred with MIME type application/zip
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That fixes Chrome, but breaks other browsers. My Android phones won't download from that kind of link.
– Betty
Aug 28 '15 at 11:20
38
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JavaScript click event listener on class
... Older browsers (like IE6, IE7, IE8) don´t support getElementsByClassName and so they return undefined.
EDIT : Correction
getElementsByClassName doesnt return an array, but a HTMLCollection in most, or a NodeList in some browsers (Mozilla ref). Both of these types are Array-Like, (meaning that ...
How to save password when using Subversion from the console
... no. Change it to yes (or just comment it out because it defaults to yes), and the next time you give Subversion your password it should save it.
You might want to ensure that the owner and permissions of ~/.subversion/config are correct (no public or group access; 600).
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How to create file execute mode permissions in Git on Windows?
I use Git in Windows, and want to push the executable shell script into git repo by one commit.
5 Answers
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Select columns from result set of stored procedure
I have a stored procedure that returns 80 columns, and 300 rows. I want to write a select that gets 2 of those columns. Something like
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How to concatenate strings of a string field in a PostgreSQL 'group by' query?
...ving it at the end, you might want to make your own concatenation function and substitute it for the "textcat" above. Here is one I put together and tested on 8.3.12:
CREATE FUNCTION commacat(acc text, instr text) RETURNS text AS $$
BEGIN
IF acc IS NULL OR acc = '' THEN
RETURN instr;
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How to read a single character from the user?
...cter from the user input? For instance, they press one key at the terminal and it is returned (sort of like getch() ). I know there's a function in Windows for it, but I'd like something that is cross-platform.
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No appenders could be found for logger(log4j)?
...valid.
That guide will give you some information about how to use loggers and appenders.
Just to get you going you have two simple approaches you can take.
First one is to just add this line to your main method:
BasicConfigurator.configure();
Second approach is to add this standard log4j.pro...