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How to get the current time in milliseconds from C in Linux?
...amp;spec);
s = spec.tv_sec;
ms = round(spec.tv_nsec / 1.0e6); // Convert nanoseconds to milliseconds
if (ms > 999) {
s++;
ms = 0;
}
printf("Current time: %"PRIdMAX".%03ld seconds since the Epoch\n",
(intmax_t)s, ms);
}
If your goal is to measure...
How to sort with a lambda?
...
Then you understand my confusion. I think it might be something weird with my VC10 Express (no service pack). I moved the project onto a machine with Visual Studio 2010 Team and it worked without the "-> bool".
– B...
Using [UIColor colorWithRed:green:blue:alpha:] doesn't work with UITableView seperatorColor?
...
You need to divide by 255.0
Because I hardly ever use values between 1.0 and 0.0, I created a very simple UIColor category that does the messy looking division by itself: (from http://github.com/Jon889/JPGeneral)
//.h file
@interface UIColor (JPExtras)
+ (UIColor *)colorWithR:(CGFloat)red G:(CGFl...
Does Java support default parameter values?
...
No, the structure you found is how Java handles it (that is, with overloading instead of default parameters).
For constructors, See Effective Java: Programming Language Guide's Item 1 tip (Consider static factory methods instead of constructors) if the overloading ...
How to make an HTTP POST web request
....
request.Method = "POST";
// Create POST data and convert it to a byte array.
string postData = "This is a test that posts this string to a Web server.";
byte[] byteArray = Encoding.UTF8.GetBytes(postData);
// Set the ContentType property ...
Do try/catch blocks hurt performance when exceptions are not thrown?
...mployee we came across a large section of code inside a try{} block. She and an IT representative suggested this can have effects on performance of the code. In fact, they suggested most of the code should be outside of try/catch blocks, and that only important sections should be checked. The Micr...
How do I clone a range of array elements to a new array?
...reate a new array containing all the elements from X that begin at index 3 and ends in index 7. Sure I can easily write a loop that will do it for me but I would like to keep my code as clean as possible. Is there a method in C# that can do it for me?
...
Select rows of a matrix that meet a condition
...
This is easier to do if you convert your matrix to a data frame using as.data.frame(). In that case the previous answers (using subset or m$three) will work, otherwise they will not.
To perform the operation on a matrix, you can define a column by nam...
Fastest way to determine if an integer is between two integers (inclusive) with known sets of values
...arison/branch. Whether it'll really improve speed may be open to question, and even if it does, it's probably too little to notice or care about, but when you're only starting with two comparisons, the chances of a huge improvement are pretty remote. The code looks like:
// use a < for an inclus...
How do you rotate a two dimensional array?
...e. Printing the matrix is the same complexitiy
– Alejandro
Aug 4 '15 at 20:34
6
For a -90 degrees...