大约有 44,000 项符合查询结果（耗时：0.0209秒） [XML]
biggest integer that can be stored in a double
... do mean smaller, and that's exactly what I mean when I say smaller :-) -1,000,000 is less than 1, but it is not smaller.
– Steve Jessop
Dec 5 '09 at 13:23
...
Pad a number with leading zeros in JavaScript [duplicate]
... 1 in there.
Example usage:
pad(10, 4); // 0010
pad(9, 4); // 0009
pad(123, 4); // 0123
pad(10, 4, '-'); // --10
share
|
improve this answer
|
follow
...
Why do people say there is modulo bias when using a random number generator?
...which is 3 bits. Unfortunately, 3 random bits yields 8 possible outcomes:
000 = 0, 001 = 1, 010 = 2, 011 = 3
100 = 4, 101 = 5, 110 = 6, 111 = 7
We can reduce the size of the outcome set to exactly 6 by taking the value modulo 6, however this presents the modulo bias problem: 110 yields a 0, and 1...
Fastest way to convert string to integer in PHP
...fail cast: 7.87444186211
This was a test that ran each scenario 10,000,000 times. :-)
Co-ercion is 0 + "123"
Casting is (integer)"123"
I think Co-ercion is a tiny bit faster. Oh, and trying 0 + array('123') is a fatal error in PHP. You might want your code to check the type of the supplie...
SQL Server: Database stuck in “Restoring” state
...
RESTORE DATABASE successfully processed 0 pages in 18.530 seconds
(0.000 MB/sec).
The database was usable again after those 18 seconds.
share
|
improve this answer
|
...
Sort a text file by line length including spaces
...
Fast! Did 465,000 line file (one word per line) in <1 second, when output redirected into another file - thus: cat testfile.txt | perl -e 'print sort { length($a) <=> length($b) } <>' > out.txt
– css...
Remove commas from the string using JavaScript
...you can do the maths, you'll need parseFloat:
var total = parseFloat('100,000.00'.replace(/,/g, '')) +
parseFloat('500,000.00'.replace(/,/g, ''));
share
|
improve this answer
...
Track the time a command takes in UNIX/LINUX?
...looks like, timed with time:
$ time sleep 1
real 0m1.001s
user 0m0.000s
sys 0m0.000s
share
|
improve this answer
|
follow
|
...
How to access the last value in a vector?
...plyr::last(x) 21832 35269.0 60523.40 63726.0 75539.5 200064 100
x[end(x)[1]] 21008128 23004594.5 37356132.43 30006737.0 47839917.0 105430564 100
rev(x)[1] 74317382 92985054.0 108618154.55 102328667.5 112443834.0 187925942 100
This immediately rules out anythi...
Nearest neighbors in high-dimensional data?
...rs to tesselate your data space. On average, each Voronoi cell will have 4,000 data points. So instead of performing on average 500,000 distance calculations (brute force), you perform far lesss, on average just 125 + 2,000.
III. Calculating the Result (the predicted response variable)
There are t...