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What does a b prefix before a python string mean?
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63
This is Python3 bytes literal. This prefix is absent in Python 2.5 and older (it is equivalent t...
How to create circle with Bézier curves?
...in the sense that the middle of the curve lies on the circle itself, is (4/3)*tan(pi/(2n)).
So for 4 points it is (4/3)*tan(pi/8) = 4*(sqrt(2)-1)/3 = 0.552284749831.
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How to change checkbox's border style in CSS?
...order's style? I've put border:1px solid #1e5180 upon it, but in FireFox 3.5, nothing happens!
14 Answers
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Difference Between Invoke and DynamicInvoke
...alidated. For example:
Func<int,int> twice = x => x * 2;
int i = 3;
int j = twice.Invoke(i);
// or just:
int j = twice(i);
However! If you just know that it is Delegate, it has to resolve the parameters etc manually - this might involve unboxing, etc - a lot of reflection is going on. Fo...
Javascript: formatting a rounded number to N decimals
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edited Feb 8 '10 at 11:33
answered Feb 8 '10 at 11:27
Gu...
How do you find the sum of all the numbers in an array in Java?
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In java-8 you can use streams:
int[] a = {10,20,30,40,50};
int sum = IntStream.of(a).sum();
System.out.println("The sum is " + sum);
Output:
The sum is 150.
It's in the package java.util.stream
import java.util.stream.*;
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How to write asynchronous functions for Node.js
...as
async_function(42, function(val) {
console.log(val)
});
console.log(43);
Will print 42 to the console asynchronously. In particular process.nextTick fires after the current eventloop callstack is empty. That call stack is empty after async_function and console.log(43) have run. So we print 4...
Can a for loop increment/decrement by more than one?
...in Javascript besides i++ and ++i ? For example, I want to increment by 3 instead of one.
7 Answers
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