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About .bash_profile, .bashrc, and where should alias be written in? [duplicate]
.../.bashrc but only ~/.profile or ~/.bash_profile, so you should source that one manually from the latter. You'll see me do that in my ~/.profile too: source ~/.bashrc.
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Django. Override save for model
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Check the model's pk field. If it is None, then it is a new object.
class Model(model.Model):
image=models.ImageField(upload_to='folder')
thumb=models.ImageField(upload_to='folder')
description=models.CharField()
def save(self, *args, **kwargs)...
Cleanest way to get last item from Python iterator
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Why the placeholder "defaultvalue"? Why not None? This is precisely what None is for. Are you suggesting that some function-specific default value could even be correct? If the iterator doesn't actually iterate, then an out-of-band value is more meaningful than some ...
OpenSSL: PEM routines:PEM_read_bio:no start line:pem_lib.c:703:Expecting: TRUSTED CERTIFICATE [close
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at least i am not the only one who made this mistake... i am surprised the module does not alert us to this.
– edwardsmarkf
Sep 13 '19 at 15:03
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What is NoSQL, how does it work, and what benefits does it provide? [closed]
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What exactly is it?
On one hand, a specific system, but it has also become a generic word for a variety of new data storage backends that do not follow the relational DB model.
How does it work?
Each of the systems labelled with the generic name w...
Can “using” with more than one resource cause a resource leak?
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@Chris: Suppose there is zero work done between the allocation and the return, and between the return and the assignment. We delete all those Blah method calls. What stops a ThreadAbortException from happening at either of those points?
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Quick Sort Vs Merge Sort [duplicate]
...gorithm demonstrating any complexity C where C is worse than O(n log n) exponentially decreases as the input size grows.
– Sam Harwell
Oct 13 '09 at 2:35
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How to make a promise from setTimeout
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Original Answer from 2014
Usually you'll have a promise library (one you write yourself, or one of the several out there). That library will usually have an object that you can create and later "resolve," and that object will have a "promise" you can get from it.
Then later would tend to ...
how to remove X-Powered-By in ExpressJS [duplicate]
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This is not the desired/perfect/correct answer. See the one with the most upvotes. Cheers!
– ptz0n
Feb 12 '14 at 12:40
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iPhone 5 CSS media query
The iPhone 5 has a longer screen and it's not catching my website's mobile view. What are the new responsive design queries for the iPhone 5 and can I combine with existing iPhone queries?
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