If the cache line containing the byte or word you’re loading is not already present in the cache, your CPU will request the 64 bytes that begin at the cache line boundary (the largest address below the one you need that is multiple of 64). Modern PC memory modules transfer 64 bits (8 bytes) at … Read more
if (distance(A, C) + distance(B, C) == distance(A, B)) return true; // C is on the line. return false; // C is not on the line. or just: return distance(A, C) + distance(B, C) == distance(A, B); The way this works is rather simple. If C lies on the AB line, you’ll get the following … Read more
You may want to look at my answer to an SO question about adding a line to an image matrix. Here’s a similar example to the one I have in that answer, which will make a white line running from row and column index (10, 10) to (240, 120): img = imread(‘cameraman.tif’); % Load a … Read more
The number of lines in the textarea would be textarea.value.match(/\n/g).length + 1
Not sure if jQuery will help you out much here, but you could take a look at the element.getClientRects method, documented on MSDN and MDC. More specifically, this example at MSDN is sort of similar to what you want to achieve, highlighting lines using a cleverly z-indexed div element that goes behind the text at … Read more
It’s more idiomatic to write your code like this def ProcessLargeTextFile(): with open(“filepath”, “r”) as r, open(“outfilepath”, “w”) as w: for line in r: x, y, z = line.split(‘ ‘)[:3] w.write(line.replace(x,x[:-3]).replace(y,y[:-3]).replace(z,z[:-3])) The main saving here is to just do the split once, but if the CPU is not being taxed, this is likely to make … Read more
You need to have two drawing calls: One for the non-persistent line that follows the cursor in the MouseMove using someControls.CreateGraphics the other for the persisting line, triggered in the MouseUp, where you store the coordinates and call Invalidate on your canvas control and draw in the Paint event of your canvas using its e.Graphics … Read more
Yes. First I would restructure your data for easier iteration, like this: var series = [ [{time: 1, value: 2}, {time: 2, value: 4}, {time: 3, value: 8}], [{time: 1, value: 5}, {time: 2, value: 9}, {time: 3, value: 12}], [{time: 1, value: 3}, {time: 2, value: 2}, {time: 3, value: 2}], [{time: 1, value: … Read more
Based on a clarification of the question, here’s an implementation of creating intermediary points along a <polyline> element such that the marker-mid=”url(#arrowhead)” attribute will work. See below that for an introduction to markers and arrowheads. Demo: http://jsfiddle.net/Zv57N/ midMarkers(document.querySelector(‘polyline’),6); // Given a polygon/polyline, create intermediary points along the // “straightaways” spaced no closer than `spacing` distance … Read more
$myFile = “4-24-11.txt”; $lines = file($myFile);//file in to an array echo $lines[1]; //line 2 file — Reads entire file into an array