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Find index of a value in an array
Can linq somehow be used to find the index of a value in an array?
8 Answers
8
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How do I get the name of the active user via the command line in OS X?
How do I get the name of the active user via the command line in OS X?
12 Answers
12
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Why is there an injected class name?
...
The injected class name means that X is declared as a member of X, so that name lookup inside X always finds the current class, not another X that might be declared at the same enclosing scope, e.g.
void X() { }
class X {
public:
static X create() { return ...
Can't use modulus on doubles?
... for the fmod() function.
#include <cmath>
int main()
{
double x = 6.3;
double y = 2.0;
double z = std::fmod(x,y);
}
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How to format numbers? [duplicate]
...oLocaleString() with minimumFractionDigits. Browser compatibility for the extended options on toLocaleString() was limited when I first wrote this answer, but the current status looks good.
var n = 100000;
var value = n.toLocaleString(
undefined, // leave undefined to use the browser's locale,...
Ruby, Difference between exec, system and %x() or Backticks
...You have to provide the command as a string argument to this method. For example:
>> system("date")
Wed Sep 4 22:03:44 CEST 2013
=> true
The invoked program will use the current STDIN, STDOUT and STDERR objects of your Ruby program. In fact, the actual return value is either true, false...
Counting the Number of keywords in a dictionary in python
...ill negligible in comparison to whatever else your program is doing.
d = {x: x**2 for x in range(1000)}
len(d)
# 1000
len(d.keys())
# 1000
%timeit len(d)
# 41.9 ns ± 0.244 ns per loop (mean ± std. dev. of 7 runs, 10000000 loops each)
%timeit len(d.keys())
# 83.3 ns ± 0.41 ns per loop (mean ...
What does Python's eval() do?
... eval function lets a Python program run Python code within itself.
eval example (interactive shell):
>>> x = 1
>>> eval('x + 1')
2
>>> eval('x')
1
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Why doesn't Dictionary have AddRange?
...ut in a manner that fits with the Framework guidelines.
AddRange doesn't exist because a range doesn't have any meaning to an associative container, as the range of data allows for duplicate entries. E.g if you had an IEnumerable<KeyValuePair<K,T>> that collection does not guard against...