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Count table rows
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You can do COUNT(1), this will be the fastest way.
– Shota Papiashvili
Sep 14 '16 at 17:05
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How to get the current loop index when using Iterator?
...ad the same question and found using a ListIterator worked. Similar to the test above:
List<String> list = Arrays.asList("zero", "one", "two");
ListIterator iter = list.listIterator();
while (iter.hasNext()) {
System.out.println("index: " + iter.nextIndex() + " value: " + iter.next());
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Convert boolean to int in Java
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I just did a test converting 1,000,000 random Boolean values and this method was consistently faster than that based on the ternary operator. It shaved off about 10ms.
– Mapsy
Oct 24 '14 at 13:14
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How do I convert array of Objects into one Object in JavaScript?
...j, [item.key]: item.value}) ,{});
One more solution that is 99% faster is(tested on jsperf):
var object = arr.reduce((obj, item) => (obj[item.key] = item.value, obj) ,{});
Here we benefit from comma operator, it evaluates all expression before comma and returns a last one(after last comma). So ...
Why does GCC generate 15-20% faster code if I optimize for size instead of speed?
... are more favorable to -Os optimizations.
Here are the results for time ./test 0 0 on several processors (user time reported):
Processor (System-on-Chip) Compiler Time (-O2) Time (-Os) Fastest
AMD Opteron 8350 gcc-4.8.1 0.704s 0.896s -O2
AMD FX-63...
What are good message queue options for nodejs? [closed]
... except kue is not well maintained, has several issues and not a single test !
– vvo
Nov 28 '13 at 10:36
4
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How to hide status bar in Android
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@Ron I was testing on API level 8. It's possible the behaviour is different on other levels?
– Ben Clayton
Jan 21 '13 at 14:02
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Developing C# on Linux
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You can also install it using conda (tested on Ubuntu):
conda create --name csharp
conda activate csharp
conda install -c conda-forge mono
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What command means “do nothing” in a conditional in Bash?
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If you don't test the result both true and false are effectively no-ops as far as the script is concerned, but in principle they could fork in some shells that accept this syntax so perhaps : is better.
– dmckee --- ...
Adding dictionaries together, Python [duplicate]
...'dic0': 0}
dic1 = {'dic1': 1}
dic2 = dict(dic0.items() + dic1.items())
I tested this in IDLE and it works fine.
However, the previous question on this topic states that this method is slow and chews up memory. There are several other ways recommended there, so please see that if memory usage is i...