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Is there any particular difference between intval and casting to int - `(int) X`?
...to sanitize integers for inclusion into a SQL IN() clause by passing it to array_map. Here is an example:
$ids = implode(",", array_map('intval', $_POST['array_of_integers']));
$sql = "SELECT * FROM table WHERE ids IN ($ids)";
...
How to convert an IPv4 address into a integer in C#?
...BitConverter.ToUInt32(IPAddress.Parse(value).GetAddressBytes().Reverse().ToArray() to fix IPAddress.Address is obsolete
– Mhmd
May 28 '16 at 11:50
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Is there a case insensitive jQuery :contains selector?
...icket/278
$.extend($.expr[':'], {
'containsi': function(elem, i, match, array)
{
return (elem.textContent || elem.innerText || '').toLowerCase()
.indexOf((match[3] || "").toLowerCase()) >= 0;
}
});
then use :containsi instead of :contains
...
Java: convert List to a String
JavaScript has Array.join()
22 Answers
22
...
Finding index of character in Swift String
...also applies to positions. The _position is probably an index into the raw array of bytes and they don't want to expose that. The String.Index is meant to protect us from accessing bytes in the middle of characters.
That means that any index you get must be created from String.startIndex or String....
How to map and remove nil values in Ruby
...pact
=> [1, 3]
I'd like to remind people that if you're getting an array containing nils as the output of a map block, and that block tries to conditionally return values, then you've got code smell and need to rethink your logic.
For instance, if you're doing something that does this:
[1...
Assign pandas dataframe column dtypes
...
Another way to set the column types is to first construct a numpy record array with your desired types, fill it out and then pass it to a DataFrame constructor.
import pandas as pd
import numpy as np
x = np.empty((10,), dtype=[('x', np.uint8), ('y', np.float64)])
df = pd.DataFrame(x)
df.dty...
How can I convert an RGB image into grayscale in Python?
...o use scikit-image, which provides some functions to convert an image in ndarray, like rgb2gray.
from skimage import color
from skimage import io
img = color.rgb2gray(io.imread('image.png'))
Notes: The weights used in this conversion are calibrated for contemporary CRT phosphors: Y = 0.2125 R +...
Why is require_once so bad to use?
... $fp = fopen("/proc/$pid/stat", "r");
$line = fread($fp, 2048);
$array = split(" ", $line);
// Write out the statistics; on RedHat 4.5 with kernel 2.6.9
// 14 is user jiffies; 15 is system jiffies
$cntr = 0;
foreach($array as $elem)
{
$cntr++;
echo "sta...
Is there an online name demangler for C++? [closed]
... -t
See it live with this example which demangles:
_Z6kernelIfLj3EEvPT_5arrayIPKS0_XT0_EES5_S2_IjXT0_EES6_S0_
to:
void kernel<float, 3u>(float*, array<float const*, 3u>, array<float const*, 3u>, array<unsigned int, 3u>, array<unsigned int, 3u>, float)
^...