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How to check if a variable is not null?
... two ways in JavaScript to check whether a variable is not null , but I’m confused which is the best practice to use.
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What are the differences between GPL v2 and GPL v3 licenses? [closed]
In simple terms, what are the reasons for, and what are the differences between the GPL v2 and GPL v3 open source licenses? Explanations and references to legal terms and further descriptions would be appreciated.
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How to get a tab character?
In HTML, there is no character for a tab, but I am confused as to why I can copy and paste one here: . (You can't see the full width of it, but if you click to edit my question, you will see the character.) If I can copy and paste a tab character, there should be a unicode equivalent that can be ...
Ignoring new fields on JSON objects using Jackson [duplicate]
I'm using Jackson JSON library to convert some JSON objects to POJO classes on an android application. The problem is, the JSON objects might change and have new fields added while the application is published, but currently it will break even when a simple String field is added, which can safely be...
Sorting arraylist in alphabetical order (case insensitive)
I have a string arraylist names which contains names of people. I want to sort the arraylist in alphabetical order.
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Error Dropping Database (Can't rmdir '.test\', errno: 17)
Basically, I was taught on how to create a root password using the "mysqladmin -u root -p password" command, this was done all through the windows command editor. Now, the next process was to display the default databases (info. schema, mysql and test) which was achieved by using "SHOW DATABASES;"
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Get hours difference between two dates in Moment Js
I'm able to get the difference between two dates using MomentJs as follows:
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Fastest check if row exists in PostgreSQL
... inserts are always done in batches. So I want to check if a single row from the batch exists in the table because then I know they all were inserted.
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bs4.FeatureNotFound: Couldn't find a tree builder with the features you requested: lxml. Do you need
The above outputs on my Terminal. I am on Mac OS 10.7.x. I have Python 2.7.1, and followed this tutorial to get Beautiful Soup and lxml, which both installed successfully and work with a separate test file located here . In the Python script that causes this error, I have included this line:
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Appending to an object
I have an object that holds alerts and some information about them:
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