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How do I parallelize a simple Python loop?
This is probably a trivial question, but how do I parallelize the following loop in python?
13 Answers
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Retrieve only the queried element in an object array in MongoDB collection
...r to filter an array during projection, which has the benefit of including all matches, instead of just the first one.
db.test.aggregate([
// Get just the docs that contain a shapes element where color is 'red'
{$match: {'shapes.color': 'red'}},
{$project: {
shapes: {$filter: {
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Is it possible to cache POST methods in HTTP?
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The corresponding RFC 2616 in section 9.5 (POST) allows the caching of the response to a POST message, if you use the appropriate headers.
Responses to this method are not cacheable, unless the response
includes appropriate Cache-Control or Expires header fields. Howe...
Django: How do I add arbitrary html attributes to input fields on a form?
... earlier to modify 3 fields: ``` for field_name in ['image', 'image_small', 'image_mobile']: field = self.fields.get(field_name) field.widget.attrs['data-file'] = 'file' ```
– Stuart Axon
Jun 6 '14 at 11:59
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Automatic HTTPS connection/redirect with node.js/express
...ng to get HTTPS set up with a node.js project I'm working on. I've essentially followed the node.js documentation for this example:
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What is the Python equivalent of Matlab's tic and toc functions?
...e stuff
Sometimes I find this technique more convenient than timeit - it all depends on what you want to measure.
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EntityType has no key defined error
...a CLS-compliant type, meaning unsigned types like uint, ulong etc. are not allowed.
This error can also be caused by configuration mistakes.
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Git - fatal: Unable to create '/path/my_project/.git/index.lock': File exists
... directory. The error message is rather explicit as to what causes it typically, so if you have no other git processes running (which is the normal case), go ahead and delete that file.
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How do you produce a .d.ts “typings” definition file from an existing JavaScript library?
...initelyTyped/DefinitelyTyped) first. This is a community repo full of literally thousands of .d.ts files and it's very likely the thing you're using is already there.
You should also check TypeSearch (https://microsoft.github.io/TypeSearch/) which is a search engine for NPM-published .d.ts files; th...
How to convert a String to its equivalent LINQ Expression Tree?
...nking as a Where clause. If necessary, put it inside a list/array just to call .Where(string) on it! i.e.
var people = new List<Person> { person };
int match = people.Where(filter).Any();
If not, writing a parser (using Expression under the hood) isn't hugely taxing - I wrote one similar (a...