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Why switch is faster than if
...bleswitch instruction, it can simply check to see if the key is within the range defined by low and high. If not, it takes the default branch offset. If so, it just subtracts low from key to get an offset into the list of branch offsets. In this manner, it can determine the appropriate branch offset...
ReactJS: Modeling Bi-Directional Infinite Scrolling
...f 10k allocations is too big, you can instead pass a function that takes a range and return the elements.
<List>
{thousandelements.map(function() { return <Element /> })}
</List>
Your List component is keeping track of what the scroll position is and only renders the children ...
What is the difference between ArrayList.clear() and ArrayList.removeAll()?
...
@ateiob e.remove() is two extra method calls, a range check, and an object return (internal to AbstractList.Itr.remove() and ArrayList.remove(int)), too
– Atreys
Aug 11 '11 at 20:19
...
Write bytes to file
...public static byte[] StringToByteArray(string hex) {
return Enumerable.Range(0, hex.Length)
.Where(x => x % 2 == 0)
.Select(x => Convert.ToByte(hex.Substring(x, 2), 16))
.ToArray();
}
...
jQuery UI sliders on touch devices
... it working for me. The only issue now is that the background region (when range: "min" is set) is not obeying the slider position.
– ejectamenta
Oct 31 '18 at 12:45
add a com...
uppercase first character in a variable with bash
...rk in language/locales incorporating letters that aren't in the a-z or A-Z ranges.
– Charles Duffy
Mar 8 '17 at 18:01
...
best way to preserve numpy arrays on disk
...Not that random data
data['semi-random'] = np.zeros((size, size))
for i in range(size):
for j in range(size):
data['semi-random'][i,j] = np.sum(data['random'][i,:]) + np.sum(data['random'][:,j])
# Not random data
data['not-random'] = np.arange( size*size, dtype=np.float64 ).reshape( (si...
Webfonts or Locally loaded fonts?
...rs, but with Google Fonts you can choose to be served specific subsets and range of characters to speed up the delivery even more.
Choosing a subset:
<link href="http://fonts.googleapis.com/css?family=Open+Sans&subset=latin" rel="stylesheet">
Choosing a range of characters:
<!-- On...
Quicksort: Choosing the pivot
...
There are several options.
Simple: Pick the first or last element of the range. (bad on partially sorted input)
Better: Pick the item in the middle of the range. (better on partially sorted input)
However, picking any arbitrary element runs the risk of poorly partitioning the array of size n into...
Why do == comparisons with Integer.valueOf(String) give different results for 127 and 128?
... 127. It must be, according to JLS 5.1.7. It may be cached outside of that range, but doesn't have to be (and often isn't).
– yshavit
Apr 22 '16 at 19:07
...