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What is the difference between class and instance methods?
...methods on many Foundation classes like NSString's +stringWithFormat: or NSArray's +arrayWithArray:. An instance method would be NSArray's -count method.
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Scalar vs. primitive data type - are they the same thing?
...vant in context.
Scalars are typically contrasted with compounds, such as arrays, maps, sets, structs, etc. A scalar is a "single" value - integer, boolean, perhaps a string - while a compound is made up of multiple scalars (and possibly references to other compounds). "Scalar" is used in context...
How to modify a global variable within a function in bash?
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Thanks for the point, but I have to return an string array, and within the function I have to add elements to two global string arrays.
– harrison4
May 9 '14 at 13:00
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Difference between Observer, Pub/Sub, and Data Binding
...r UI views correspondingly.
But the Cons are Observables only maintain one array for keeping observers
(in the example, the array is observersList).
It does NOT differentiate how the update is triggered because it only has one notify function, which triggers all the functions stored in that array.
I...
Javascript seconds to minutes and seconds
...gested by Dru)
function str_pad_left(string,pad,length) {
return (new Array(length+1).join(pad)+string).slice(-length);
}
var finalTime = str_pad_left(minutes,'0',2)+':'+str_pad_left(seconds,'0',2);
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Save and load MemoryStream to/from a file
... In the first code block, instead of manually copying memory stream to array, you can use built-in ms.ToArray() function.
– Gman
Mar 25 '13 at 12:36
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Sort points in clockwise order?
Given an array of x,y points, how do I sort the points of this array in clockwise order (around their overall average center point)? My goal is to pass the points to a line-creation function to end up with something looking rather "solid", as convex as possible with no lines intersecting.
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Drawing Isometric game worlds
...just rendering the map by using a nested for-loop over the two-dimensional array, such as this example:
tile_map[][] = [[...],...]
for (cellY = 0; cellY < tile_map.size; cellY++):
for (cellX = 0; cellX < tile_map[cellY].size cellX++):
draw(
tile_map[cellX][cellY],
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Logical Operators, || or OR?
...that when $this->positions() returns false or null, $positions is empty array. But it isn't. The value is TRUE or FALSE depends on what $this->positions() returns.
If you need to get value of $this->positions() or empty array, you have to use:
$positions = $this->positions() or [];
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How can I remove a character from a string using Javascript?
...moveCharAt = function (i) {
var tmp = this.split(''); // convert to an array
tmp.splice(i - 1 , 1); // remove 1 element from the array (adjusting for non-zero-indexed counts)
return tmp.join(''); // reconstruct the string
}
console.log("crt/r2002_2".removeCharAt(4));
Since user1293504...