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Sending images using Http Post
...client to the Django server using Http Post. The image is chosen from the gallery. At present, I am using list value name Pairs to send the necessary data to the server and receiving responses from Django in JSON. Can the same approach be used for images (with urls for images embedded in JSON respon...
How to apply a function to two columns of Pandas dataframe
Suppose I have a df which has columns of 'ID', 'col_1', 'col_2' . And I define a function :
12 Answers
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How can I reverse a NSArray in Objective-C?
...ne. If I see a method that returns an immutable object, I expect it to actually be returning an immutable object. Having it appear to return an immutable object but actual return a mutable object is a dangerous practice to get into.
– Christine
Jul 2 '12 at 22:...
How do I write JSON data to a file?
... codecs.getwriter('utf-8')(f), ensure_ascii=False)
The codecs.getwriter call is redundant in Python 3 but required for Python 2
Readability and size:
The use of ensure_ascii=False gives better readability and smaller size:
>>> json.dumps({'price': '€10'})
'{"price": "\\u20ac10"}'
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How does '20 seconds' work in Scala?
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There are a few things going on.
First, Scala allows dots and parens to be omitted from many method calls, so 20 seconds is equivalent to 20.seconds()*.
Second, an "implicit conversion" is applied. Since 20 is an Int and Int has no seconds method, the compiler searches ...
How to create directories recursively in ruby?
...c/d.txt, but I do not know if any of these directories exist". My solution allows to use the existing file path ('/a/b/c/d.txt'), and, without separate parsing, create all the folders.
– Vadym Tyemirov
Oct 9 '19 at 4:47
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How to override Backbone.sync?
I'm trying out Backbone.js, and one of the things I'm trying is to make a call to a remote API, so I need to be able to override Backbone.sync, as I understand the documentation .
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Function in JavaScript that can be called only once
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If by "won't be executed" you mean "will do nothing when called more than once", you can create a closure:
var something = (function() {
var executed = false;
return function() {
if (!executed) {
executed = true;
// do something
}
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How to get started on TDD with Ruby on Rails? [closed]
...the concepts (took testing classes in college), but I am not sure how to really use them yet since I never worked on a "real" TDD project.
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Object.watch() for all browsers?
...s answer I gave to a similar question works fine here)
I have created a small object.watch shim for this a while ago. It works in IE8, Safari, Chrome, Firefox, Opera, etc.
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