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Pandas dataframe get first row of each group
I have a pandas DataFrame like following.
5 Answers
5
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Open link in new tab or window [duplicate]
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You should add the target="_blank" and rel="noopener noreferrer" in the anchor tag.
For example:
<a target="_blank" rel="noopener noreferrer" href="http://your_url_here.html">Link</a>
Adding rel="noopener noreferrer" is not mandatory, but it's ...
How to do Base64 encoding in node.js?
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Buffers can be used for taking a string or piece of data and doing base64 encoding of the result. For example:
> console.log(Buffer.from("Hello World").toString('base64'));
SGVsbG8gV29ybGQ=
> console.log(Buffer.from("SGVsbG8gV29ybGQ=", 'base64').toString('ascii'))
Hello Worl...
Java: Getting a substring from a string starting after a particular character
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Finally something really handy, didn't know about this method. I hate to hassle with substring + indexof + 1 - 2 +3 whatsoever. This is much cleaner :)
– BAERUS
Feb 6 '18 at 8:05
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Whitespace Matching Regex - Java
...is strictly required to meet UTS#18’s RL1.2! What it does have is not standards-conforming, alas.
Unicode defines 26 code points as \p{White_Space}: 20 of them are various sorts of \pZ GeneralCategory=Separator, and the remaining 6 are \p{Cc} GeneralCategory=Control.
White space is a pretty s...
appearanceWhenContainedIn in Swift
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UIBarButtonItem is not an UIView and needs to be extended separately
– Sergey Skoblikov
Apr 4 '15 at 9:59
7
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HTML-encoding lost when attribute read from input field
I’m using JavaScript to pull a value out from a hidden field and display it in a textbox. The value in the hidden field is encoded.
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What Git branching models work for you?
...company is currently using a simple trunk/release/hotfixes branching model and would like advice on what branching models work best for your company or development process.
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Java Array Sort descending?
...tive array in descending order is, first sort the array in ascending order and then reverse the array in place. This is also true for two-dimensional primitive arrays.
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How to Flatten a Multidimensional Array?
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You can use the Standard PHP Library (SPL) to "hide" the recursion.
$a = array(1,2,array(3,4, array(5,6,7), 8), 9);
$it = new RecursiveIteratorIterator(new RecursiveArrayIterator($a));
foreach($it as $v) {
echo $v, " ";
}
prints
1 2 3 4 ...