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How can I determine if a variable is 'undefined' or 'null'?
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@ChrisStryczynski In example from your comment you declared y constant, but you ware comparing abc (not y). When I tested y via console.log(y == null); on Chrome and Firefox I got true as result. If you got error then maybe you tried to use assignment op...
Why does Pycharm's inspector complain about “d = {}”?
...me. In my case, I'm populating my dict partially as literals and partially from a tuple output by a function, like so:
def get_other_values():
return 3, 4
foo = {
"a": 1,
"b": 2
}
foo["c"], foo["d"] = get_other_values()
So, unless I create interim vars for the output of get_other_val...
Otherwise on StateProvider
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This is now deprecated - see answer from @babyburger
– Vedran
May 29 '19 at 9:20
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Add a custom attribute to a Laravel / Eloquent model on load?
...erstand how your stuff works. If EventSession::all() returns a JSON object from an API, you are not really using a Laravel model, right? Sorry, I'm confused on how you implemented you model.
– Alexandre Danault
Jun 21 '13 at 13:40
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Java concurrency: Countdown latch vs Cyclic barrier
...could be renamed to ResetbleCountDownLatch.
We should tell the differences from the perspective of their goals, which are described in JavaDoc
CountDownLatch: A synchronization aid that allows one or more threads to wait until a set of operations being performed in other threads completes.
CyclicB...
Importing a Swift protocol in Objective-C class
...known to the compiler.
This is also described in the section "Using Swift from Objective-C" in the Apple Docs
Note that XCode will give a warning in the objC header file when you use the forward declared protocol ("Cannot find protocol definition for 'AnalyticProtocol'), but this is can be ignore...
What is the difference between and ?
...the top (and bottom probably), so was wondering where that space is coming from. Needed to get rid of the space.
– WhatsInAName
Feb 7 '13 at 0:39
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Get “Internal error in the expression evaluator” on “Add watch” function when trying to debug WCF se
...n an internal error occurred.
I solved the problem by adding other items from inside their subs or functions and there were no errors again.
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.keyCode vs. .which
...e is now deprecated and will be dropped:
This feature has been removed from the Web standards. Though some browsers may still support it, it is in the process of being dropped. Avoid using it and update existing code if possible; see the compatibility table at the bottom of this page to guide yo...
Is leaked memory freed up when the program exits?
... the OS keep track of all allocations? Any heap memory you allocate comes from the virtual memory space of the process - when the process terminates, that space is given back to the system wholesale, right? I don't see why the extra bookkeeping would be necessary, since the process making the allo...