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Use dynamic variable names in JavaScript
In PHP you can do amazing/horrendous things like this:
17 Answers
17
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Why do we copy then move?
I saw code somewhere in which someone decided to copy an object and subsequently move it to a data member of a class. This left me in confusion in that I thought the whole point of moving was to avoid copying. Here is the example:
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Strings as Primary Keys in SQL Database [closed]
... wouldn't it depend on the database? I would think a properly indexed string would not be that much slower if at all from a number?
– Ryan Guill
Feb 5 '09 at 20:09
2
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How do I delete rows in a data frame?
...ven by the '-' operator" -> This is a very misleading wording. Negative indexes are removed and that's it, there is no notion of complement. If you work with logical and try using - it won't work, because the complement operator for logicals is !. The complement of c(2,4,6) in the rows would rath...
cartesian product in pandas
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Use pd.MultiIndex.from_product as an index in an otherwise empty dataframe, then reset its index, and you're done.
a = [1, 2, 3]
b = ["a", "b", "c"]
index = pd.MultiIndex.from_product([a, b], names = ["a", "b"])
pd.DataFrame(index = ...
GIT: Checkout to a specific folder
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As per Do a "git export" (like "svn export")?
You can use git checkout-index for that, this is a low level command, if you want to export everything, you can use -a,
git checkout-index -a -f --prefix=/destination/path/
To quote the man pages:
The final "/" [on the prefix] is important. Th...
SQLite error 'attempt to write a readonly database' during insert?
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Good idea, but no-go. Whoever PHP is running as doesn't have write privileges, so it can't create the file. Is there anyway PHP can retrieve what user it is currently running as?
– Austin Hyde
Jul 23 '10 at 18:24
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How can I get the corresponding table header (th) from a table cell (td)?
... $th = $td.closest('tbody').prev('thead').find('> tr > th:eq(' + $td.index() + ')');
Or a little bit simplified
var $th = $td.closest('table').find('th').eq($td.index());
share
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improve t...
Flatten an Array of Arrays in Swift
...ay.flatten(0, self)
}
public static func flatten<Element>(_ index: Int, _ toFlat: [Element]) -> [Element] {
guard index < toFlat.count else { return [] }
var flatten: [Element] = []
if let itemArr = toFlat[index] as? [Element] {
flatten = fl...
ie8 var w= window.open() - “Message: Invalid argument.”
...ng the following code its working...
onclick="window.open('privacy_policy.php','','width=1200,height=800,scrollbars=yes');
Previously i Entered like
onclick="window.open('privacy_policy.php','Window title','width=1200,height=800,scrollbars=yes');
Means Microsoft does not allow you to enter win...