大约有 47,000 项符合查询结果（耗时：0.0898秒） [XML]
How to calculate the difference between two dates using PHP?
...rom this it's rather easy to calculate different time periods.
$date1 = "2007-03-24";
$date2 = "2009-06-26";
$diff = abs(strtotime($date2) - strtotime($date1));
$years = floor($diff / (365*60*60*24));
$months = floor(($diff - $years * 365*60*60*24) / (30*60*60*24));
$days = floor(($diff - $years ...
Generate random numbers using C++11 random library
...u can see his full talk here: http://channel9.msdn.com/Events/GoingNative/2013/rand-Considered-Harmful
#include <random>
#include <iostream>
int main() {
std::random_device rd;
std::mt19937 mt(rd());
std::uniform_real_distribution<double> dist(1.0, 10.0);
for (in...
How to express infinity in Ruby?
...y 1.8.6, 1.8.7, and 1.9.2 you have Float.infinite?.
PositiveInfinity = +1.0/0.0
=> Infinity
NegativeInfinity = -1.0/0.0
=> -Infinity
CompleteInfinity = NegativeInfinity..PositiveInfinity
=> -Infinity..Infinity
*I've verified this in Ruby 1.8.6 and 1.9.2
...
Decimal separator comma (',') with numberDecimal inputType in EditText
...
105
A workaround (until Google fix this bug) is to use an EditText with android:inputType="numberDe...
Understanding scala enumerations
...
150
the Enumeration trait has a type member Value representing the individual elements of the enumer...
How do I give text or an image a transparent background using CSS?
...
30 Answers
30
Active
...
Splitting string into multiple rows in Oracle
...oach to splitting a string (comma delimited) into multiple rows in Oracle 10g (preferably) and 11g.
13 Answers
...
How to position a DIV in a specific coordinates?
...
answered Jul 23 '11 at 20:01
Michael BerkowskiMichael Berkowski
246k3636 gold badges408408 silver badges359359 bronze badges
...
Truncate a list to a given number of elements
What method truncates a list--for example to the first 100 elements--discarding the others (without iterating through individual elements)?
...
Confusion between factor levels and factor labels
...ends?
– donodarazao
May 3 '11 at 13:02
6
I would often transform the levels right before plotting...