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What is the easiest way to duplicate an activerecord record?
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When I do this, I get an unknown attribute error with one column because of a column that is there due to a has_many relationship. Is there any way around this?
– Ruben Martinez Jr.
Jul 5 '14 at 19:57
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How can I list ALL DNS records?
... specific nameserver: dig -x example.com
#!/bin/bash
set -e; set -u
COMMON_SUBDOMAINS="www mail mx a.mx smtp pop imap blog en ftp ssh login"
EXTENDED=""
while :; do case "$1" in
--) shift; break ;;
-x) EXTENDED=y; shift ;;
-s) NS="$2"; shift 2 ;;
*) break ;;
esac; done
DOM="$1"; shift
TYPE...
Cross compile Go on OSX?
...arted by trying to do: $ GOARCH=386 GOOS=linux go build app.go and getting error # runtime /usr/local/go/src/pkg/runtime/extern.go:137: undefined: theGoos /usr/local/go/src/pkg/runtime/extern.go:137: cannot use theGoos as type string in const initializer
– ljgww
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Make sure only a single instance of a program is running
...cntl.LOCK_EX | fcntl.LOCK_NB)
already_running = False
except IOError:
already_running = True
return already_running
A lot like S.Lott's suggestion, but with the code.
share
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How do I delete multiple rows in Entity Framework (without foreach)
... command to sql like so: WHERE IN ("1, 2, 3"). The database then throws an error because you passed it a string instead of a list of integers.
– JesseNewman19
Aug 1 '16 at 16:42
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std::string formatting like sprintf
... ) + 1; // Extra space for '\0'
if( size <= 0 ){ throw std::runtime_error( "Error during formatting." ); }
std::unique_ptr<char[]> buf( new char[ size ] );
snprintf( buf.get(), size, format.c_str(), args ... );
return std::string( buf.get(), buf.get() + size - 1 ); // We do...
Specifying rails version to use when creating a new application
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I get error when using 3.1.3 when 3.1.3 and 3.2.0.rc1 are installed. Here is the error --- [ninad@localhost devel]$ rails _3.1.3_ new sample_app /home/ninad/.rbenv/versions/1.9.2-p290/lib/ruby/site_ruby/1.9.1/rubygems.rb:314:in bi...
Android Studio installation on Windows 7 fails, no JDK found
...bin folder, you will find studio.bat. Execute the file, and it'll show the error. If it is about the Java path then follow the tip 1.
Tip 1
When you set the path JAVA_HOME, etc., make sure not to include bin at the end of the path. This solved the issue for me.
JAVA_HOME => C:\Program Files\Ja...
ORA-30926: unable to get a stable set of rows in the source tables
... This is probably why other approaches (for me) also returned other errors for me (like 'procedure, function, package or type is not allowed here' and 'Cannot modify a column which maps to a non key-preserved table error while trying to insert into a view'). ~ If it helps anyone else, I got t...
Implements vs extends: When to use? What's the difference?
Please explain in an easy to understand language or a link to some article.
18 Answers
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