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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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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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“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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What is the difference between JSON and Object Literal Notation?
...ion .json.
► JavaScript Object Notation (JSON) is a lightweight, text-based, language-independent data interchange format. JSON has been used to exchange data between applications written in any Programming language.
The JSON object is a single object that contains two functions, parse and ...
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)...
Gradient of n colors ranging from color 1 and color 2
...es gradients nice ( click here for an example ). I have a need to work in base and I think scales can be used there to create color gradients as well but I'm severely off the mark on how. The basic goal is generate a palette of n colors that ranges from x color to y color. The solution needs to...
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...
AngularJS toggle class using ng-class
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As alternate solution, based on javascript logic operator '&&' which returns the last evaluation, you can also do this like so:
<i ng-class="autoScroll && 'icon-autoscroll' || !autoScroll && 'icon-autoscroll-disabled'"&g...
How to define a preprocessor symbol in Xcode
...tring=\@\"www.foobar.org\"
And in the source code:
objectManager.client.baseURL = APPURL_NSString;
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