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Get distance between two points in canvas
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You can do it with pythagoras theorem
If you have two points (x1, y1) and (x2, y2)
then you can calculate the difference in x and difference in y, lets call them a and b.
var a = x1 - x2;
var b = y1 - y2;
var c = Math.sqrt( a*a + b*b );
// c is the distance
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List OrderBy Alphabetical Order
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If you mean an in-place sort (i.e. the list is updated):
people.Sort((x, y) => string.Compare(x.LastName, y.LastName));
If you mean a new list:
var newList = people.OrderBy(x=>x.LastName).ToList(); // ToList optiona...
Windows XP or later Windows: How can I run a batch file in the background with no window displayed?
... file asynchronously from your first that shares your first one's window. If both batch files write to the console simultaneously, the output will be overlapped and probably indecipherable. Also, you'll want to put an exit command at the end of your second batch file, or you'll be within a second ...
How can I order a List?
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If it's not the solution that you'd choose then why propose it as an answer? Propose what you'd do as the answer; if that means changing the type from IList to List so you can call .Sort on it, then why not do that.
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C Macro definition to determine big endian or little endian machine?
...ing arbitrary byte orders, ready to be put into a file called order32.h:
#ifndef ORDER32_H
#define ORDER32_H
#include <limits.h>
#include <stdint.h>
#if CHAR_BIT != 8
#error "unsupported char size"
#endif
enum
{
O32_LITTLE_ENDIAN = 0x03020100ul,
O32_BIG_ENDIAN = 0x00010203ul,...
Converting an object to a string
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I would recommend using JSON.stringify, which converts the set of the variables in the object to a JSON string. Most modern browsers support this method natively, but for those that don't, you can include a JS version:
var obj = {
name: 'myObj'
};
JSON.st...
Objective-C implicit conversion loses integer precision 'NSUInteger' (aka 'unsigned long') to 'int'
...ou can either declare the local count variable as
NSUInteger count;
or (if you are sure that your array will never contain more than 2^31-1 elements!),
add an explicit cast:
int count = (int)[myColors count];
share
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Comparing two dictionaries and checking how many (key, value) pairs are equal
I have two dictionaries, but for simplification, I will take these two:
26 Answers
26
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Can a decorator of an instance method access the class?
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If you are using Python 2.6 or later you could use a class decorator, perhaps something like this (warning: untested code).
def class_decorator(cls):
for name, method in cls.__dict__.iteritems():
if hasattr(method...
How to make an HTML back link?
...ent a itself in onmouseover as follow
function showtext(thetext) {
if (!document.getElementById)
return
textcontainerobj = document.getElementById("tabledescription")
browserdetect = textcontainerobj.filters ? "ie" : typeof textcontainerobj.style.MozOpacity == "string" ? "mozilla"...