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How can I read and parse CSV files in C++?
...tandard C++11 library. It copes well with Excel CSV quotation:
spam eggs,"foo,bar","""fizz buzz"""
1.23,4.567,-8.00E+09
The code is written as a finite-state machine and is consuming one character at a time. I think it's easier to reason about.
#include <istream>
#include <string>
#i...
Why can't I use the 'await' operator within the body of a lock statement?
...on:
// Now it's clear where the locks will be acquired and released
lock (foo)
{
}
var result = await something;
lock (foo)
{
}
So by prohibiting you from awaiting in the lock block itself, the language is forcing you to think about what you really want to do, and making that choice clearer in th...
What is tail recursion?
...ny
number as argument; it will never
overflow the stack:
function foo (n)
if n > 0 then return foo(n - 1) end
end
... As I said earlier, a tail call is a
kind of goto. As such, a quite useful
application of proper tail calls in
Lua is for programming state machines.
Such ...
c++11 Return value optimization or move? [duplicate]
...
Use exclusively the first method:
Foo f()
{
Foo result;
mangle(result);
return result;
}
This will already allow the use of the move constructor, if one is available. In fact, a local variable can bind to an rvalue reference in a return statement prec...
Can I set a breakpoint on 'memory access' in GDB?
...
What you're looking for is called a watchpoint.
Usage
(gdb) watch foo: watch the value of variable foo
(gdb) watch *(int*)0x12345678: watch the value pointed by an address, casted to whatever type you want
(gdb) watch a*b + c/d: watch an arbitrarily complex expression, valid in the progra...
Creating functions in a loop
...have a function that accesses a global variable, like this:
global_var = 'foo'
def my_function():
print(global_var)
global_var = 'bar'
my_function()
When you read this code, you would - of course - expect it to print "bar", not "foo", because the value of global_var has changed after the fu...
Process all arguments except the first one (in a bash script)
...
Surprisingly foo=shift doesn't do what I'd expect.
– Keith Smiley
Mar 3 '14 at 16:45
...
What is a “first chance exception”?
...atement that throws. You see the message A first chance exception of type 'foo' occurred in YourApp.exe. You can still continue (F5) or step further (F11). Then if there is a catch for this, control goes there. If there is no catch block, you get the "second-chance" break, this time the message is A...
How can I get the sha1 hash of a string in node.js?
... = require('crypto')
var shasum = crypto.createHash('sha1')
shasum.update('foo')
shasum.digest('hex') // => "0beec7b5ea3f0fdbc95d0dd47f3c5bc275da8a33"
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Variable number of arguments in C++?
...
in c++11 you can do:
void foo(const std::list<std::string> & myArguments) {
//do whatever you want, with all the convenience of lists
}
foo({"arg1","arg2"});
list initializer FTW!
...