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How to read the RGB value of a given pixel in Python?
...bject which returns a pixel access object which you can manipulate like an array:
from PIL import Image
im = Image.open('dead_parrot.jpg') # Can be many different formats.
pix = im.load()
print im.size # Get the width and hight of the image for iterating over
print pix[x,y] # Get the RGBA Value ...
Append integer to beginning of list in Python [duplicate]
...
>>>var=7
>>>array = [1,2,3,4,5,6]
>>>array.insert(0,var)
>>>array
[7, 1, 2, 3, 4, 5, 6]
How it works:
array.insert(index, value)
Insert an item at a given position. The first argument is the index of the element bef...
How to get last N records with activerecord?
... database instead of 1. I guess I assume that you need to iterate over the array at some point, so you could let ruby sort it at at that time. (ie. records.reverse.each do ..)
– Dan McNevin
Jan 7 '09 at 14:25
...
What does “Memory allocated at compile time” really mean?
... allocated inside the process memory map.
For example, consider a global array:
int array[100];
The compiler knows at compile-time the size of the array and the size of an int, so it knows the entire size of the array at compile-time. Also a global variable has static storage duration by defaul...
Split a collection into `n` parts with LINQ?
...tition<T>
(this IEnumerable<T> source, int size)
{
T[] array = null;
int count = 0;
foreach (T item in source)
{
if (array == null)
{
array = new T[size];
}
array[count] = item;
count++;
if (count == size)
...
Convert array of integers to comma-separated string
...
Pre .NET 4 string.Join(",", Array.ConvertAll(arr, i => i.ToString()))
– TPAKTOPA
Dec 12 '14 at 14:06
...
how to File.listFiles in alphabetical order?
...ithout a filter does not guarantee any order.
It does, however, return an array, which you can sort with Arrays.sort().
File[] files = XMLDirectory.listFiles(filter_xml_files);
Arrays.sort(files);
for(File _xml_file : files) {
...
}
This works because File is a comparable class, which by def...
How to detect if multiple keys are pressed at once using JavaScript?
...ncept
The way I do it is like this:
var map = {}; // You could also use an array
onkeydown = onkeyup = function(e){
e = e || event; // to deal with IE
map[e.keyCode] = e.type == 'keydown';
/* insert conditional here */
}
This code is very simple: Since the computer only passes one keyst...
Why is the use of alloca() not considered good practice?
...really no problem with it that you wouldn't also have with declaring large arrays?
– T.E.D.
Jun 19 '09 at 16:32
95
...
How to pass all arguments passed to my bash script to a function of mine? [duplicate]
... you can do this without messing with the argument list using a variant of array slicing: "${@:3}" will get you the arguments starting with "$3". "${@:3:4}" will get you up to four arguments starting at "$3" (i.e. "$3" "$4" "$5" "$6"), if that many arguments were passed.
Things you probably don't w...