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How to Deep clone in javascript
...t really depends what you would like to clone. Is this a truly JSON object or just any object in JavaScript? If you would like to do any clone, it might get you into some trouble. Which trouble? I will explain it below, but first, a code example which clones object literals, any primitives, arrays a...
What's the difference between IEquatable and just overriding Object.Equals()?
... its List.Contains() method. Should I implement IEquatable<Food> or just override Object.Equals() ? From MSDN:
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running Rails console in production
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if you're running rails 3.0 or greater, you can also use
rails console production
production can of course be substituted with development or test (value is development by default)
Adding the option --sandbox makes it so that any changes you make t...
What is the usefulness of PUT and DELETE HTTP request methods?
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DELETE is for deleting the request resource:
The DELETE method requests that the origin server delete the resource identified by the Request-URI. This method MAY be overridden by human intervention (or other means) on the origin ser...
What does “connection reset by peer” mean?
What is the meaning of the "connection reset by peer" error on a TCP connection? Is it a fatal error or just a notification or related to the network failure?
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What are file descriptors, explained in simple terms?
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In simple words, when you open a file, the operating system creates an entry to represent that file and store the information about that opened file. So if there are 100 files opened in your OS then there will be 100 entries in OS (some...
What is the correct JSON content type?
I've been messing around with JSON for some time, just pushing it out as text and it hasn't hurt anybody (that I know of), but I'd like to start doing things properly.
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How to debug a Flask app
How are you meant to debug errors in Flask? Print to the console? Flash messages to the page? Or is there a more powerful option available to figure out what's happening when something goes wrong?
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Django queries - id vs pk
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It doesn't matter. pk is more independent from the actual primary key field i.e. you don't need to care whether the primary key field is called id or object_id or whatever.
It also provides more consistency if you have models with different primary k...
Chrome Dev Tools - “Size” vs “Content”
When viewing information about stylesheets in the Network tab of Chrome's dev tools, one column specifies both "size" and "content":
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