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Test if characters are in a string
...ng, try finding 1 match in a bunch of shorter strings: vec <- replicate(100000, paste( sample(letters, 10, replace=TRUE), collapse='') ).
– Greg Snow
Apr 12 '12 at 19:52
2
...
“Eliminate render-blocking CSS in above-the-fold content”
...e weight as low as possible
And don't puzzle your brain about how to get 100% of Google's PageSpeed Insights tool ...! ;-)
Addition 1: Here is the page on which Google shows us, what they recommend for Optimize CSS Delivery.
As said before, I don't think that this is neither realistic nor that i...
Calculate the median of a billion numbers
...f the network can be presumed to be instantaneous, for example if you have 100 cores with equal access to RAM containing the data.
Since network I/O is likely to be the bound, there might be some tricks you can play, at least for the data coming back to the control machine. For example, instead of ...
How to multiply duration by integer?
...the int32 to a time.Duration, such as time.Sleep(time.Duration(rand.Int31n(1000)) * time.Millisecond).
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Swift how to sort array of custom objects by property value
...ile(fileName: "Car", fileID: 300),
ImageFile(fileName: "Boat", fileID: 100),
ImageFile(fileName: "Plane", fileID: 200)
]
let sortedImages = images.sorted()
print(sortedImages)
/*
prints: [ImageFile with ID: 100, ImageFile with ID: 200, ImageFile with ID: 300]
*/
#2. Sort with descend...
Canvas is stretched when using CSS but normal with “width” / “height” properties
...t my canvas to have a relative size? That is to say, how to mimic a width: 100%; css property?
– Maxbester
Mar 7 '13 at 8:00
1
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How to track down a “double free or corruption” error
...de<stdio.h>
#include<stdlib.h>
int main()
{
char *x = malloc(100);
free(x);
free(x);
return 0;
}
[sand@PS-CNTOS-64-S11 testbox]$ vim t1.c
[sand@PS-CNTOS-64-S11 testbox]$ cc -g t1.c -o t1
[sand@PS-CNTOS-64-S11 testbox]$ ./t1
*** glibc detected *** ./t1: double free or corruption (to...
How to use a switch case 'or' in PHP
...oth method is not efficient when dealing with large cases ... imagine 1 to 100 this would work perfectly
$r1 = range(1, 100);
$r2 = range(100, 200);
$v = 76;
switch (true) {
case in_array($v, $r1) :
echo 'the value is in range 1 to 100';
break;
case in_array($v, $r2) :
...
What is a “slug” in Django?
... as:
class Article(models.Model):
title = models.CharField(max_length=100)
content = models.TextField(max_length=1000)
slug = models.SlugField(max_length=40)
How would you reference this object with a URL and with a meaningful name? You could for instance use Article.id so the URL wou...
find first sequence item that matches a criterion [duplicate]
...than a complete list comprehension. Compare these two:
[i for i in xrange(100000) if i == 1000][0]
next(i for i in xrange(100000) if i == 1000)
The first one needs 5.75ms, the second one 58.3µs (100 times faster because the loop 100 times shorter).
...