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Separating class code into a header and cpp file
...d declarations code of a simple class into a new header and cpp file. For em>x m>ample, how would I separate the code for the following class?
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After Installing Java JDK 7 For Mac OS m>X m> - mvn -version still shows java version 1.6.0_31
Oracle released Java JDK 7 on April 26 for Mac OS m>X m>. I followed the install instructions and when I do java -version in a terminal window I get:
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What's the difference between lapply and do.call?
...r to map in other languages:
lapply returns a list of the same length as m>X m>, each element of which is the result of applying FUN to the corresponding element of m>X m>.
do.call constructs and em>x m>ecutes a function call from a name or a function and a list of arguments to be passed to it.
Map applies a fun...
Why doesn't Dijkstra's algorithm work for negative weight edges?
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Recall that in Dijkstra's algorithm, once a vertem>x m> is marked as "closed" (and out of the open set) - the algorithm found the shortest path to it, and will never have to develop this node again - it assumes the path developed to this path is the shortest.
But with negative ...
Differences in boolean operators: & vs && and | vs ||
... the rules for && and || but what are & and | ? Please em>x m>plain these to me with an em>x m>ample.
11 Answers
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How to determine if a number is odd in JavaScript
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Use the bitwise AND operator.
function oddOrEven(m>x m>) {
return ( m>x m> & 1 ) ? "odd" : "even";
}
function checkNumber(argNumber) {
document.getElementById("result").innerHTML = "Number " + argNumber + " is " + oddOrEven(argNumber);
}
checkNumber(17);
<div i...
Running V8 Javascript Engine Standalone
...shell.
Running the console:
$> ./v8-shell
V8 version 2.0.2
> var m>x m> = 10;
> m>x m>
10
> function foo(m>x m>) { return m>x m> * m>x m>; }
> foo
function foo(m>x m>) { return m>x m> * m>x m>; }
> quit()
Em>x m>ecuting Javascript from the command line:
$> ./v8-shell -e 'print("10*10 = " + 10*10)'
10*10 = 100
Man...
How to filter by IP address in Wireshark?
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Match destination: ip.dst == m>x m>.m>x m>.m>x m>.m>x m>
Match source: ip.src == m>x m>.m>x m>.m>x m>.m>x m>
Match either: ip.addr == m>x m>.m>x m>.m>x m>.m>x m>
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What is an invariant?
The word seems to get used in a number of contem>x m>ts. The best I can figure is that they mean a variable that can't change. Isn't that what constants/finals (darn you Java!) are for?
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How do I calculate square root in Python?
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sqrt=m>x m>**(1/2) is doing integer division. 1/2 == 0.
So you're computing m>x m>(1/2) in the first instance, m>x m>(0) in the second.
So it's not wrong, it's the right answer to a different question.
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