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What is the difference between null and undefined in JavaScript?
I want to know what the difference is between null and undefined in JavaScript.
33 Answers
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How do I update a GitHub forked repository?
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In your local clone of your forked repository, you can add the original GitHub repository as a "remote". ("Remotes" are like nicknames for the URLs of repositories - origin is one, for example.) Then you can fetch all the branches from that upstream repository, and rebase your work to con...
Generate random integers between 0 and 9
How can I generate random integers between 0 and 9 (inclusive) in Python?
19 Answers
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Inserting data into a temporary table
After having created a temporary table and declaring the data types like so;
12 Answers
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Servlet for serving static content
...ferent containers (Tomcat and Jetty), but their default servlets for serving the static content have a different way of handling the URL structure I want to use ( details ).
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Wrapping synchronous code into asynchronous call
...on, that consumes quite a lot of time to complete. A call to this method might occur up to 3 times during one user request, depending on the cache state and parameters that user provides. Each call takes about 1-2 seconds to complete. The method itself is synchronous call to the service and there is...
400 vs 422 response to POST of data
I'm trying to figure out what the correct status code to return on different scenarios with a "REST-like" API that I'm working on. Let's say I have a end point that allows POST'ing purchases in JSON format. It looks like this:
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Depend on a branch or tag using a git URL in a package.json?
Say I've forked a node module with a bugfix and I want to use my fixed version, on a feature branch of course, until the bugfix is merged and released.
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jQuery ui dialog change title after load-callback
I like to change the title from an UI Dialog after i have submitted a form in this UI Dialog. So in the callback-function after load i should suggest, but i've tried and googled without result.
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Delete rows from a pandas DataFrame based on a conditional expression involving len(string) giving K
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When you do len(df['column name']) you are just getting one number, namely the number of rows in the DataFrame (i.e., the length of the column itself). If you want to apply len to each element in the column, use df['column name'].map(len). So try
df[df['column name'].map(len) < 2]
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