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Does JavaScript guarantee object property order?
...like keys don't stick to the insertion order at all.
The question is, for what methods this order is guaranteed in the ES2015 spec?
The following methods guarantee the order shown:
Object.assign
Object.defineProperties
Object.getOwnPropertyNames
Object.getOwnPropertySymbols
Reflect.ownKeys
The...
Why does `True == False is False` evaluate to False? [duplicate]
...that the description of the language's rules is quite enough to understand what's going on. The disassembly doesn't seem to add much (other than a focus on implementation-specific details).
– cHao
Jun 20 '13 at 17:55
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What's the best way of structuring data on firebase?
I am new to firebase and I want to know what's the best way of structuring data on it.
3 Answers
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How to check whether an array is empty using PHP?
...ayers will either be empty or a comma separated list (or a single value). What is the easiest way to check if it's empty? I'm assuming I can do so as soon as I fetch the $gameresult array into $gamerow ? In this case it would probably be more efficient to skip exploding the $playerlist if it's...
When does ADT set BuildConfig.DEBUG to false?
...
What exactly did u do?
– pbhowmick
Jun 11 '13 at 13:56
2
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Is there a Python caching library?
...s a wiki that mentioned how to use it as an WSGI middleware. It looks like what I need, thank you.
– Stavros Korokithakis
Sep 15 '09 at 14:20
7
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What is the difference between a 'closure' and a 'lambda'?
...lambda (x) (+ x 2)) 7 )
OK, now it's time to solve the other mystery: what is a closure.
In order to do that, let's talk about symbols (variables) in lambda expressions.
As I said, what the lambda abstraction does is binding a symbol in its subexpression, so that it becomes a substitutible par...
How to debug a bash script? [closed]
...-x script [arg1 ...]
bash -x script [arg1 ...]
These give you a trace of what is being executed. (See also 'Clarification' near the bottom of the answer.)
Sometimes, you need to control the debugging within the script. In that case, as Cheeto reminded me, you can use:
set -x
This turns debug...
Why is a combiner needed for reduce method that converts type in java 8
... an Integer in your case, so passing it 0 is fine.
Another way to achieve what you want :
int length = asList("str1", "str2").stream().mapToInt (s -> s.length())
.reduce(0, (accumulatedInt, len) -> accumulatedInt + len);
Here the type of the stream matches the return type of re...
Arduino Sketch upload issue - avrdude: stk500_recv(): programmer is not responding
...nswers around here among good ideas. Let's try to be a bit more real about what's happening and sum up the good stuff to check:
Basically, when that happens, it is a good idea to enable verbose mode for AVRDUDE, to get a better idea of what's happening. To do so, you only need to go in the preferen...