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What is std::promise?
... of several promises and associated futures and have a single thread which does several calculations and sets a result on each promise. async would only allow you to return a single result, to return several you would need to call async several times, which might waste resources.
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Why does “while(true)” without “Thread.sleep” cause 100% CPU usage on Linux but not on Windows?
..., top on Linux runs in so-called IRIX mode, while the Windows Task Manager does not. Let's say you have 4 cores:
With IRIX mode on, 1 fully utilized core is 100% and 4 cores are 400%.
With IRIX mode off, 1 fully utilized core is 25% and 4 cores are 100%.
This means that by default, top on Linu...
What is the difference between
... i have met somewhere in code this variant else <%== %> does anyone know what is it?
– okliv
Jul 11 '12 at 17:03
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What does the double colon (::) mean in CSS?
What does the double colon ( :: ) mean in CSS?
3 Answers
3
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Why does InetAddress.isReachable return false, when I can ping the IP address?
Why does isReachable return false ? I can ping the IP.
10 Answers
10
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Why does i = i + i give me 0?
... issue is due to integer overflow.
In 32-bit twos-complement arithmetic:
i does indeed start out having power-of-two values, but then overflow behaviors start once you get to 230:
230 + 230 = -231
-231 + -231 = 0
...in int arithmetic, since it's essentially arithmetic mod 2^32.
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How does one capture a Mac's command key via JavaScript?
How does one capture a Mac's Cmd key via JavaScript?
7 Answers
7
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What does the number in parentheses shown after Unix command names in manpages mean?
... order is correct and intentional.
Related:
Google search for "linux what does the number mean in parenthesis after a function?" - https://www.google.com/search?q=linux+what+does+the+number+mean+in+parenthesis+after+a+function%3F&oq=linux+what+does+the+number+mean+in+parenthesis+after+a+functio...
Why does Lua have no “continue” statement?
... I hope they include an actual continue one day. The goto replacement doesn't look very nice and needs more lines. Also, wouldn't that create trouble if you had more than one loop doing this in one function, both with ::continue::? Making up a name per loop doesn't sound like a decent thing to ...
How does “make” app know default target to build if no target is specified?
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By default, it begins by processing the first target that does not begin with a . aka the default goal; to do that, it may have to process other targets - specifically, ones the first target depends on.
The GNU Make Manual covers all this stuff, and is a surprisingly easy and infor...