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How to create a directory if it doesn't exist using Node.js?
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using *Sync methods is usually a no-no: don't want to block the event loop
– Max Heiber
Feb 13 '17 at 21:23
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How to interpret API documentation function parameters?
...a way as to confuse perennial newbs / hackers / DIYers like myself?
It's really not meant to be written that way. I'll agree there seems to be no ease of use across API documentations. However, there is a lot of cross over from older man style syntax conventions, to the modern API/namespace conventi...
Why should I use Google's CDN for jQuery?
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This is because:
It increases the parallelism available. (Most browsers will only download 3 or 4 files at a time from any given site.)
It increases the chance that there will be a cache-hit. (As more sites follow this practice, more users already have the fil...
Web API Routing - api/{controller}/{action}/{id} “dysfunctions” api/{controller}/{id}
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god answer. but can't we add for all, api/{controller}/{action}/{id} along with api/{controller}/{id} ?
– karim
Nov 26 '14 at 11:16
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What is the difference between String and string in C#?
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string is an alias in C# for System.String.
So technically, there is no difference. It's like int vs. System.Int32.
As far as guidelines, it's generally recommended to use string any time you're referring to an object.
e.g.
string place = "world";
Likewise, I think it's g...
Total memory used by Python process?
... be
print(process.memory_info()[0])
instead (there was a change in the API).
Note: do pip install psutil if it is not installed yet.
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The case against checked exceptions
...jlsberg and his work, this argument has always struck me as bogus. It basically boils down to:
"Checked exceptions are bad because programmers just abuse them by always catching them and dismissing them which leads to problems being hidden and ignored that would otherwise be presented to the us...
Zero-based month numbering [closed]
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The use of zero to start counting is actually an optimization trick from Assembly programmers. Instead of assigning 1 to the count register, they XOR'ed the register with itself, which was slightly faster in CPU cycles. This meant that counting would start with 0 an...
If a DOM Element is removed, are its listeners also removed from memory?
...veChild() for example).
However, this isn't true; the jQuery library actually has an internal method (which is undocumented and in theory could be changed at any time) called cleanData() (here is what this method looks like) which automatically cleans up all the data/events associated with an elem...
Select distinct values from a table field
...ant any ordering to be applied to a query, not even the default ordering, call order_by() with no parameters.
and distinct() in the note where it discusses issues with using distinct() with ordering.
To query your DB, you just have to call:
models.Shop.objects.order_by().values('city').distinct(...