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How can I determine if a JavaScript variable is defined in a page? [duplicate]
...eck if a variable named "x" is defined in a page, if I do if(x != null) , it gives me an error.
7 Answers
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node.js, Error: Cannot find module 'express'
...cation. I got stuck on my very first sample code and need some help to get it running. Before I post this question, I did search on stack overflow, found some similar questions but still could not fix it.
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How to access custom attributes from event object in React?
...act is able to render custom attributes as described at
http://facebook.github.io/react/docs/jsx-gotchas.html :
15 Answer...
How to scroll to top of page with JavaScript/jQuery?
Is there a way to control browser scrolling with JavaScript/jQuery?
27 Answers
27
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Inserting image into IPython notebook markdown
...to depend heavily on the IPython notebook app to develop and document algorithms. It is awesome; but there is something that seems like it should be possible, but I can't figure out how to do it:
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TypeScript static classes
I wanted to move to TypeScript from traditional JS because I like the C#-like syntax.
My problem is that I can't find out how to declare static classes in TypeScript.
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Cannot read configuration file due to insufficient permissions
I've recently encountered an error trying to host my asp.net site with IIS. I have found a solution that many swear by.
40...
In Firebase, is there a way to get the number of children of a node without loading all the node dat
...e snippet you gave does indeed load the entire set of data and then counts it client-side, which can be very slow for large amounts of data.
Firebase doesn't currently have a way to count children without loading data, but we do plan to add it.
For now, one solution would be to maintain a counter ...
Lazy Method for Reading Big File in Python?
I have a very big file 4GB and when I try to read it my computer hangs.
So I want to read it piece by piece and after processing each piece store the processed piece into another file and read next piece.
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Is there a way for multiple processes to share a listening socket?
...forked child to have copies of all the parent's file descriptors. Any that it does not close will continue to be shared, and (for example with a TCP listening socket) can be used to accept() new sockets for clients. This is how many servers, including Apache in most cases, work.
On Windows the same...