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Mysql: Select rows from a table that are not in another
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If you have 300 columns, you should redesign your database.
– Iharob Al Asimi
Jun 1 '16 at 13:50
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Is the Javascript date object always one day off?
...ar
new Date(2011, 0); // Normal behavior as months in this case are zero based.
=> // Sat Jan 01 2011 00:00:00 GMT-0700 (MST)
Get the last month and day of a year
new Date((2011 + 1), 0, 0); // The second zero roles back one day into the previous month's last day.
=> // Sat Dec 31 201...
“webxml attribute is required” error in Maven
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This solution works for me(I was using 2.2 before). Also, I am using Java Based Configuration for Servlet 3.0 and no need to have web.xml file.
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How to get record created today by rails activerecord?
...ance issues when the table size grows.
Typically, if you perform lookups based on created_at column, add an index on the table in your migration file.
add_index :posts, :created_at
Now, to lookup records created today:
Rails 3/4
Post.where("created_at >= ?", Time.zone.now.beginning_of_day)...
WAMP/XAMPP is responding very slow over localhost
...check this by pressing CTRL+ALT+DEL and press Task Manager
Turn off the Base Filtering Engine (BFE)
What I find to be working a bit as well was turning off the Base Filtering Engine. Since stopping or disabling the BFE service will significantly reduce the security of the system you should only ...
no acceptable C compiler found in $PATH when installing python
...t in your $PATH variable.
To install gcc use this: (run as root)
Redhat base:
yum groupinstall "Development Tools"
Debian base:
apt-get install build-essential
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Understanding the Gemfile.lock file
... a source other than the main Rubygems index (e.g., git dependencies, path-based, dependencies) have a ! which means they are "pinned" to that source2 (although one must sometimes look in the Gemfile to determine in).
RUBY VERSION (optional)
The Ruby version specified in the Gemfile, when this Gem...
Is SonarQube Replacement for Checkstyle, PMD, FindBugs?
...cts. The main added value, however, is that it stores the history in a database. You can then see the trend. Are you improving the code base or are you doing the opposite? Only a tool with memory can tell you that.
You should run Sonar in your CI system so that even things that take some time to ex...
Check if OneToOneField is None in Django
...n < 3.2, hasattr will swallow all exceptions that happen during the database lookup, and not just DoesNotExist. This is probably broken, and not what you want.
– Pi Delport
Mar 22 '13 at 12:45
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R programming: How do I get Euler's number?
...epresents e^2.
This works because exp is the exponentiation function with base e.
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