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When to use static vs instantiated classes
...not be used.
Most utility classes such as the ones converting/formatting strings are good candidates for being a static class. My rule is simple: everything goes static in PHP unless there is one reason why it should not.
...
How to move a model between two Django apps (Django 1.7)
...ion
Point all of the FK references to the new model. If you aren't using string references, move the old model to the bottom of models.py (DON'T remove it) so it doesn't compete with the imported class.
Run makemigrations but DON'T wrap anything in state_operations (the FK changes should actually ...
How to use Elasticsearch with MongoDB?
...Promise;
var Page = mongoose.model('Page', new mongoose.Schema({
title: String,
categories: Array
}), 'your_collection_name');
// stream query
var stream = Page.find({
}, {title: 1, _id: 0, categories: 1}).limit(1500000).skip(0).batchSize(500).stream();
elasticbulk.import(stream, {
index: ...
What Does 'Then' Really Mean in CasperJS
...
require('utils').dump(casper.steps.map(function(step) {
return step.toString();
}));
That gives:
$ casperjs test-steps.js
[
"function step1() { this.echo('this is step one'); }",
"function step2() { this.echo('this is step two'); }",
"function _step() { this.open(location, settin...
“Thinking in AngularJS” if I have a jQuery background? [closed]
...together, you instead define a library of components, each identified by a string.
Say I have a component called 'FlickrService' which defines methods for pulling JSON feeds from Flickr. Now, if I want to write a controller that can access Flickr, I just need to refer to the 'FlickrService' by name...
What algorithm gives suggestions in a spell checker?
...a spelling corrector. It's basicly a brute force approach trying candidate strings with a given edit distance. (Here are some tips how you can improve the spelling corrector performance using a Bloom Filter and faster candidate hashing.)
The requirements for a spell checker are weaker. You have onl...
What's wrong with using $_REQUEST[]?
...en checking the content of the format parameter, it could be sent via querystring or a postdata, depending on a multitude of factors, not the least of which being whether or not the calling applications wants "&format=json" mixed in with its request. In this case, $_REQUEST is very convenient b...
Suppressing “is never used” and “is never assigned to” warnings in C#
...ll be returned. Just making it a public class that's empty with all public strings is nice short code and now no more warnings. Maybe using a dynamic class would be better as you don't have to explicitly state what's in the array, but I think this will be a nice reference for anyone hoping to use th...
What would a “frozen dict” be?
...ections
class FrozenDict(collections.Mapping):
"""Don't forget the docstrings!!"""
def __init__(self, *args, **kwargs):
self._d = dict(*args, **kwargs)
self._hash = None
def __iter__(self):
return iter(self._d)
def __len__(self):
return len(self._d...
Why switch is faster than if
...
@Eric it is slower for a small number of values esp String or int which are sparse.
– Peter Lawrey
Jan 3 '18 at 3:29
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