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Adding a Method to an Existing Object Instance
... that instance will be passed as the first argument whenever the method is called.
Callables that are attributes of a class (as opposed to an instance) are still unbound, though, so you can modify the class definition whenever you want:
>>> def fooFighters( self ):
... print "fooFighter...
How to prevent Node.js from exiting while waiting for a callback?
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Callback is Not Queued
Node runs until all event queues are empty. A callback is added to an event queue when a call such as
emmiter1.on('this_event',callback).
has executed. This call is part of the code written by t...
Why are joins bad when considering scalability?
...ndex for any where clause on the tables. If you don't join, mysql will typically use only one index(which might not be the most efficient one), no matter how your where clause is formed.
– leeeroy
Apr 12 '10 at 17:29
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Difference between a “coroutine” and a “thread”?
...eratively multitasked by pausing and resuming functions at set points, typically (but not necessarily) within a single thread.
Long answer: In contrast to threads, which are pre-emptively scheduled by the operating system, coroutine switches are cooperative, meaning the programmer (and possibly the...
Is there a performance impact when calling ToList()?
... works in case you're interested :)
A List<T> also uses a construct called a dynamic array which needs to be resized on demand, this resize event copies the contents of an old array to the new array. So it starts off small and increases in size if required.
This is the difference between the...
How does Apple know you are using private API?
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I'm curious about the workaround of calling private methods. I think the compiler will generate call to objc_msgSend(foo, @selector(privateMethod)) for [foo privateMethod], so if Apple can detect the direct call of privateMethod they can also detect the indirec...
How to kill all processes with a given partial name? [closed]
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For any Mac users who find this answer, like I did, the Mac equivalent is killall -m my_pattern.
– Zev Eisenberg
Aug 18 '14 at 22:25
1
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What does the “yield” keyword do?
...a list, you can read its items one by one. Reading its items one by one is called iteration:
>>> mylist = [1, 2, 3]
>>> for i in mylist:
... print(i)
1
2
3
mylist is an iterable. When you use a list comprehension, you create a list, and so an iterable:
>>> mylist = ...
mmap() vs. reading blocks
...nicely explains the reason why mmap or read might be faster or slower.
A call to mmap has more overhead than read (just like epoll has more overhead than poll, which has more overhead than read). Changing virtual memory mappings is a quite expensive operation on some processors for the same reaso...
Can I do a synchronous request with volley?
...round thread. Can I do a request using volley in that same thread, so that callbacks happen synchronously?
8 Answers
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