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What are some better ways to avoid the do-while(0); hack in C++?
...es something that can be solved with RAII. Maybe I should have said "issue error" or some such instead.
– Mats Petersson
Aug 29 '13 at 10:15
25
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Django - “no module named django.core.management”
I get the following error when trying to run Django from the command line.
21 Answers
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Writing to an Excel spreadsheet
...
I was assuming it used xlwt too, but getting an openpyxl error. For anyone else who gets confused by this - it's all in the filetype you want. The pandas (0.12) docs say "Files with a .xls extension will be written using xlwt and those with a .xlsx extension will be written using o...
Mail multipart/alternative vs multipart/mixed
...t MIMEMultipart
from email.mime.text import MIMEText
from apiclient import errors, discovery
import mimetypes
from email.mime.image import MIMEImage
from email.mime.audio import MIMEAudio
from email.mime.base import MIMEBase
SCOPES = 'https://www.googleapis.com/auth/gmail.send'
CLIENT_SECRET_FILE1 ...
How to create an empty file at the command line in Windows?
...one I use is basically the one by Nomad:
.>out.txt
It does give an error:
'.' is not recognized as an internal or external command
But this error is on stderr. And > only redirects stdout, where nothing have been produced.
Hence the creation of an empty file. The error message can be ...
How can I disable logging of asset pipeline (sprockets) messages in Ruby on Rails 3.1?
... previous_level = Rails.logger.level
Rails.logger.level = Logger::ERROR if env['PATH_INFO'] =~ %r{^/assets/}
call_without_quiet_assets(env)
ensure
Rails.logger.level = previous_level
end
alias_method_chain :call, :quiet_assets
end
end
Updated: It now works for Ru...
Swift: #warning equivalent
...or most people, but anyone who uses the R.swift pod will run into the same error I had because R.swift is a directory
– Dan F
May 27 '16 at 14:12
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Swift class introspection & generics
...ft class I tried...
class MyClass {
}
let MyClassRef = MyClass.self
// ERROR :(
let my_obj = MyClassRef()
Hmm… the error says:
Playground execution failed: error: :16:1: error: constructing an object of class type 'X' with a metatype value requires an '@required' initializer
Y().me()
...
How to send a command to all panes in tmux?
I like to call :clear-history on panes with a huge scrollback. However, I want to script a way to send this command to all the panes in the various windows.
...
iPhone OS: How do I create an NSDate for a specific date?
...TimeZone setDateFormat:@"MMM dd, yyyy"];
NSDate *theDate = nil;
NSError *error = nil;
if (![rfc3339TimestampFormatterWithTimeZone getObjectValue:&theDate forString:dateString range:nil error:&error]) {
NSLog(@"Date '%@' could not be parsed: %@", dateString, error);
}...