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Fastest way to find second (third…) highest/lowest value in vector or column
...chmarks below against most popular answers.
For 10 thousand numbers:
N = 10000
x = rnorm(N)
maxN <- function(x, N=2){
len <- length(x)
if(N>len){
warning('N greater than length(x). Setting N=length(x)')
N <- length(x)
}
sort(x,partial=len-N+1)[len-N+1]...
Specifying Style and Weight for Google Fonts
...yle. Here's how the names map to CSS font weight numbers:
Thin 100
Extra Light 200
Light 300
Regular 400
Medium 500
Semi-Bold 600
Bold 700
Extra-Bold 800
Black 900
Note that very few fonts come in all 9 weights.
...
How does the Brainfuck Hello World actually work?
...
+100
1. Basics
To understand Brainfuck you must imagine infinite array of cells initialized by 0 each.
...[0][0][0][0][0]...
When bra...
Performance of Arrays vs. Lists
...Stopwatch watch = Stopwatch.StartNew();
for (int rpt = 0; rpt < 100; rpt++)
{
int len = list.Count;
for (int i = 0; i < len; i++)
{
chk += list[i];
}
}
watch.Stop();
Console.WriteLine("List/...
What is the memory consumption of an object in Java?
Is the memory space consumed by one object with 100 attributes the same as that of 100 objects, with one attribute each?
12...
Truncate number to two decimal places without rounding
...
GumboGumbo
572k100100 gold badges725725 silver badges804804 bronze badges
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onchange event on input type=range is not triggering in firefox while dragging
.../td><td>input </td><td>100</td><td>-</td></tr>
<tr id="chg" ><td>B</td><td>change </td><td>100</td><td>-</td></tr>
<tr id="md...
What is the fastest way to create a checksum for large files in C#
...
Don't checksum the entire file, create checksums every 100mb or so, so each file has a collection of checksums.
Then when comparing checksums, you can stop comparing after the first different checksum, getting out early, and saving you from processing the entire file.
It'll sti...
How do you get the footer to stay at the bottom of a Web page?
...="footer"></div>.
* {
margin: 0;
}
html, body {
height: 100%;
}
.wrapper {
min-height: 100%;
height: auto !important;
height: 100%;
margin: 0 auto -142px; /* the bottom margin is the negative value of the footer's height */
}
.footer, .push {
height: 142px; /* ...
How can I time a code segment for testing performance with Pythons timeit?
...when you set its number argument)
import time
def myfast():
code
n = 10000
t0 = time.time()
for i in range(n): myfast()
t1 = time.time()
total_n = t1-t0
In Windows, as Corey stated in the comment, time.clock() has much higher precision (microsecond instead of second) and is preferred over t...