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Generate array of all letters and digits
...g ruby, is it possible to make an array of each letter in the alphabet and 0-9 easily?
7 Answers
...
Geometric Mean: is there a built-in?
...ositive values.
gm_mean = function(x, na.rm=TRUE){
exp(sum(log(x[x > 0]), na.rm=na.rm) / length(x))
}
Thanks to @ben-bolker for noting the na.rm pass-through and @Gregor for making sure it works correctly.
I think some of the comments are related to a false-equivalency of NA values in the d...
How dangerous is it to compare floating point values?
...nt the actual result. An easy example where you can see this is adding x = 0x1fffffe and y = 1 as floats. Here, x has 24 bits of precision in the mantissa (ok) and y has just 1 bit, but when you add them, their bits are not in overlapping places, and the result would need 25 bits of precision. Inste...
How to use if - else structure in a batch file?
... to d
copy "%sourceFile%" "%destinationFile%"
)
IF %F%==1 IF %C%==0 (
::moving the file c to d
move "%sourceFile%" "%destinationFile%"
)
IF %F%==0 IF %C%==1 (
::copying a directory c from d, /s: boş olanlar hariç, /e:boş olanlar dahil
xcopy "%sourceCopyDirectory%" "...
Checking to see if one array's elements are in another array in PHP
...
205
You can use array_intersect().
$result = !empty(array_intersect($people, $criminals));
...
CSS 3 slide-in from left transition
... One
Relevant Code
.wrapper:hover #slide {
transition: 1s;
left: 0;
}
In this case, Im just transitioning the position from left: -100px; to 0; with a 1s. duration. It's also possible to move the element using transform: translate();
CSS animation
Demo Two
#slide {
position: abso...
Turn a number into star rating display using jQuery and CSS
...tars, span.stars span {
display: block;
background: url(stars.png) 0 -16px repeat-x;
width: 80px;
height: 16px;
}
span.stars span {
background-position: 0 0;
}
Image
(source: ulmanen.fi)
Note: do NOT hotlink to the above image! Copy the file to your own server and u...
Comparing numbers in Bash
...
answered Sep 7 '13 at 0:48
jordanmjordanm
25k44 gold badges5252 silver badges6363 bronze badges
...
Numpy: Get random set of rows from 2D array
...
200
>>> A = np.random.randint(5, size=(10,3))
>>> A
array([[1, 3, 0],
[3, ...
Simple way to create matrix of random numbers
...
Take a look at numpy.random.rand:
Docstring: rand(d0, d1, ..., dn)
Random values in a given shape.
Create an array of the given shape and propagate it with random
samples from a uniform distribution over [0, 1).
>>> import numpy as np
>>> np....