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Active Record - Find records which were created_at before today
I want to get all records where the created_at field is less than today (a date).
Is there anything like:
4 Answers
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How to use Active Support core extensions
I have Active Support 3.0.3 installed and Rails 3.0.3 with Ruby 1.8.7.
5 Answers
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Count lines of code in all java classes in Android Studio
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Go to
https://plugins.jetbrains.com/idea/plugin/4509-statistic
and install the latest version
To install
Run Android Studio
From the menu bar, select File-->Settings
Under IDE Settings, click Plugins, and then click Install plugin from disk
Navigate to the folder where you downloaded the p...
How to find all the subclasses of a class given its name?
I need a working approach of getting all classes that are inherited from a base class in Python.
10 Answers
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What does Java option -Xmx stand for? [duplicate]
...it says,
-Xmxn
Specify the maximum size, in bytes, of the memory allocation pool. This value must a multiple of 1024 greater than 2MB. Append the letter k or K to indicate kilobytes, or m or M to indicate megabytes. The default value is 64MB. The upper limit for this value will be approxim...
Catching all javascript unhandled exceptions
I'm trying to find or figure out a way to display in an alert box all of the unhandled javascript exceptions in an application. I'd want all of this to be done on the client side, without using any server side code. I'm using MVC3 as an environment.
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How do I find all installed packages that depend on a given package in NPM?
...package.json, but I don't want to break something. Is there a way to list all of the installed packages that depend on it?
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How find all unused classes in Intellij Idea?
There is an inspection "Unused declaration" which can find all unused code in Intellij Idea. (see this question )
But I want to find all unused classes, not methods, variables etc. Only classes. (it is difficult to find only classes in 3000 result list). How I can do that?
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Select rows which are not present in other table
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There are basically 4 techniques for this task, all of them standard SQL.
NOT EXISTS
Often fastest in Postgres.
SELECT ip
FROM login_log l
WHERE NOT EXISTS (
SELECT -- SELECT list mostly irrelevant; can just be empty in Postgr...
How can I make pandas dataframe column headers all lowercase?
I want to make all column headers in my pandas data frame lower case
5 Answers
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