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Chaining multiple MapReduce jobs in Hadoop
...be passed in as arguments to your jobs with appropriate code to parse them and set up the parameters for the job.
I think that the above method might however be the way the now older mapred API did it, but it should still work. There will be a similar method in the new mapreduce API but i'm not sure...
Filtering for empty or NULL names in a queryset
...e.objects.exclude(alias__isnull=True)
If you need to exclude null values and empty strings, the preferred way to do so is to chain together the conditions like so:
Name.objects.exclude(alias__isnull=True).exclude(alias__exact='')
Chaining these methods together basically checks each condition i...
How to iterate over a JavaScript object?
...{
console.log(key, yourobject[key]);
}
With ES6, if you need both keys and values simultaneously, do
for (let [key, value] of Object.entries(yourobject)) {
console.log(key, value);
}
To avoid logging inherited properties, check with hasOwnProperty :
for (let key in yourobject) {
if (y...
Is there an alternative to bastard injection? (AKA poor man's injection via default constructor)
...
As far as I understand, this question relates to how to expose a loosely coupled API with some appropriate defaults. In this case, you may have a good Local Default, in which case the dependency can be regarded as optional. One way to deal with...
What's the difference between “Normal Reload”, “Hard Reload”, and ...
... do re-download every JavaScript file, image, text file, etc.
Empty Cache and Hard Reload
Obviously, if the cache is empty then it will have to do a hard reload. This will again force the browser to re-download everything. However, if the page makes any after-the-fact downloads via JavaScript that ...
Why do we need tuples in Python (or any immutable data type)?
I've read several python tutorials (Dive Into Python, for one), and the language reference on Python.org - I don't see why the language needs tuples.
...
What is the behavior difference between return-path, reply-to and from?
... delivery
{C}QUIT
{S}221 Service closing transmission channel
Where {C} and {S} represent Client and Server commands, respectively.
The recipient's mail would look like:
Return-Path: coolstuff-you=yourcompany.com@mymailinglist.com
From: <coolstuff@mymailinglist.com>
To: <you@yourcompa...
Should I compile release builds with debug info as “full” or “pdb-only”?
..., or pdb-only. Based on the answer to this question , I believe I understand some of the differences between full and pdb-only. However, which is more appropriate for a release build? If I use "full" will there be performance ramifications? If I use "pdb-only" will it be harder to debug product...
How to extract img src, title and alt from html using php? [duplicate]
...e a page where all images which reside on my website are listed with title and alternative representation.
10 Answers
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How do I unload (reload) a Python module?
I have a long-running Python server and would like to be able to upgrade a service without restarting the server. What's the best way do do this?
...