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In Python, how do I convert all of the items in a list to floats?
I have a script which reads a text file, pulls decimal numbers out of it as strings and places them into a list.
12 Answers...
How to empty a Heroku database
...:setup doesn't work with Rails 4, it fails with a Couldn't create database error.
Edit 2014-10-09: You can use rake db:setup with Rails 4. It does give you a Couldn't create database error (because the database was already created using the heroku pg:reset command). But it also loads your database ...
Remove columns from dataframe where ALL values are NA
...able(bd)
system.time({df1 <- bd[,colSums(is.na(bd) < nrow(bd))]})
# error -- can't allocate vector of size ...
system.time({df2 <- bd[, !apply(is.na(bd), 2, all)]})
# error -- can't allocate vector of size ...
system.time({df3 <- Filter(function(x)!all(is.na(x)), bd)})
## user system e...
'echo' without newline in a shell script
I have a problem with echo in my script:
9 Answers
9
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Is it possible to write to the console in colour in .NET?
...s follows. These colours can be used in a console application to view some errors in red color etc...
Console.BackgroundColor = ConsoleColor.Blue;
Console.ForegroundColor = ConsoleColor.White;//after this line every text will be white on blue background
Console.WriteLine("White on blue.");
Console....
【解决】bufferevent_openssl.c:228:19: error: storage size of \'methods...
【解决】bufferevent_openssl.c:228:19: error: storage size of 'methods_bufferevent' isn't knownxunsearch 升级 安装的时候报 libevent 编译错误：bufferevent_openssl c:228:19: error: storage size of & 39;methods_bufferevent& 39; isn& 39;t knownstatic BIO_ xunsearch 升级/安装的时...
What is the significance of initializing direction arrays below with given values when developing ch
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This is a technique to encode all directions as arrays - every pair of di[i],dj[i] is a different direction.
If we imagine we have a piece at a location x,y, and we want to add onto its x and its y value to move it to a nearby location, 1,0 is east, -1,0...
Property getters and setters
...rning:
Attempting to access 'name' from within it's own getter.
The error looks vague like this:
As an alternative you might want to use didSet. With didSet you'll get a hold to the value that is was set before and just got set to. For more see this answer.
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How do I specify a single test in a file with nosetests?
... @omikron when I specified the file I didn't have any import errors
– gabeio
Aug 25 '17 at 12:44
2
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Facebook share button and custom text [closed]
...by that.
– ShayanK
Sep 18 '12 at 12:05
I just came across this. I have like/share code on my homepage that is set to l...