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php $_POST array empty upon form submission
... There were no fault with URL, however it was pointing to a folder without index.php in URL and I was checking POST at index.php.
Here I doubted the redirection from / to /index.php causes POST data to be lost and tested URL with appending index.php to the URL.
That Worked.
Posted it here so some...
Get a pixel from HTML Canvas?
...geData object for the whole image (0,0,width,height), and then compute the index using idx = (y * width + x) * 4 like Georg's answer. However, don't forget to refresh that cached object every time the image changes.
– noio
Oct 28 '13 at 12:30
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pandas read_csv and filter columns with usecols
...andas.read_csv when I filter the columns with usecols and use multiple indexes.
5 Answers
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How do I shuffle an array in Swift?
...rom: c, to: 1, by: -1)) {
// Change `Int` in the next line to `IndexDistance` in < Swift 4.1
let d: Int = numericCast(arc4random_uniform(numericCast(unshuffledCount)))
let i = index(firstUnshuffled, offsetBy: d)
swapAt(firstUnshuffled, i)
}
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How to delete duplicates on a MySQL table?
...NORE TABLE `table_name` ADD UNIQUE (title, SID)
note: only works well if index fits in memory
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MySQL vs MongoDB 1000 reads
... lately. I had a table called posts in MySQL with about 20 million records indexed only on a field called 'id'.
7 Answers
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How to determine the first and last iteration in a foreach loop?
...more simplified version of the above and presuming you're not using custom indexes...
$len = count($array);
foreach ($array as $index => $item) {
if ($index == 0) {
// first
} else if ($index == $len - 1) {
// last
}
}
Version 2 - Because I have come to loathe using...
Git SVN error: a Git process crashed in the repository earlier
...
The file in question is likely .git/index.lock and it should be safe to just remove it if you have no other git processes running. Make sure a git-svn command isn't hanging.
PS My usual approach to fixing git-svn problems is to make a fresh pull of the repos...
Undo part of unstaged changes in git
...ts you choose individual hunks from the diff between your working copy and index to revert. Likewise, git add -p allows you to choose hunks to add to the index, and git reset -p allows you to choose individual hunks from the diff between the index and HEAD to back out of the index.
$ git checkout -...
Two-dimensional array in Swift
...ccessing the elements in a multidimensional array, the left-most subscript index refers to the element at that index in the outermost array. The next subscript index to the right refers to the element at that index in the array that’s nested one level in. And so on. This means that in the example ...