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Add only non-whitespace changes
... text editor to automatically trim trailing whitespace upon saving a file, and I am contributing to an open source project that has severe problems with trailing whitespace.
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Two-dimensional array in Swift
I get so confused about 2D arrays in Swift. Let me describe step by step. And would you please correct me if I am wrong.
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How to activate an Anaconda environment
...or your environment (so that it gets the right Python from the environment and Scripts\ on Windows).
Imagine you have created an environment called py33 by using:
conda create -n py33 python=3.3 anaconda
Here the folders are created by default in Anaconda\envs, so you need to set the PATH as:
s...
What Makes a Method Thread-safe? What are the rules?
...ere overall rules/guidelines for what makes a method thread-safe? I understand that there are probably a million one-off situations, but what about in general? Is it this simple?
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Position an element relative to its container
I'm trying to create a horizontal 100% stacked bar graph using HTML and CSS. I'd like to create the bars using DIVs with background colors and percentage widths depending on the values I want to graph. I also want to have a grid lines to mark an arbitrary position along the graph.
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Python Request Post with param data
.... It is perfectly legal to provide both types of information in a request, and your request does so too, but you encoded the URL parameters into the URL already.
Your raw post contains JSON data though. requests can handle JSON encoding for you, and it'll set the correct Content-Header too; all you...
How to solve privileges issues when restore PostgreSQL Database
I have dumped a clean, no owner backup for Postgres Database with the command
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missing private key in the distribution certificate on keychain
... anywhere. Basically, we have a company developer account (not enterprise) and so in order to submit our app, I requested from our team lead to send me the distribution certificate and create and send me a distribution provisioning profile.
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Show an image preview before upload
...at let the user interact with files locally; That means you can load files and render them in the browser without actually having to upload the files. Part of the File API is the FileReader interface which lets web applications asynchronously read the contents of files .
Here's a quick example that...
What is the PostgreSQL equivalent for ISNULL()
...ited Jan 14 '12 at 2:28
Erwin Brandstetter
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answered Feb 6 '10 at 20:02
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