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Pandas - How to flatten a hierarchical index in columns
...e a data frame with a hierarchical index in axis 1 (columns) (from a groupby.agg operation):
17 Answers
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Can you target with css?
...ecifies a line break between
words. In effect, the element is
replaced by a line break. Future
versions of CSS may handle added and
replaced content, but CSS1-based
formatters must treat ‘BR’ specially.
Grant Wagner's tests show that there is no way to style BR as you can do with oth...
Call a stored procedure with parameter in c#
...can do a delete, insert and update in my program and I try to do an insert by call a created stored procedure from my database.
...
Turning off auto indent when pasting text into vim
...
This isn't any easier than :set noai followed by :set ai. The suggestion of :r! cat is shorter.
– Leopd
May 26 '10 at 21:34
71
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What does %s mean in a python format string?
...t (and potentially format) a string. Notice that the %s token is replaced by whatever I pass to the string after the % symbol. Notice also that I am using a tuple here as well (when you only have one string using a tuple is optional) to illustrate that multiple strings can be inserted and formatte...
How to get the first item from an associative PHP array?
...hat its internal memory pointer is pointing to, which is the first element by default.
$first = current($array);
If you want to make sure that it is pointing to the first element, you can always use reset().
reset($array);
$first = current($array);
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Why use multiple columns as primary keys (composite primary key)
...ble as for other keys.
Their choice of example is perhaps misleading you by combining a meaningless key (P_Id) and a natural key (LastName). This odd choice of primary key says that the following rows are valid according to the schema and are necessary to uniquely identify a student. Intuitively t...
How to parse a query string into a NameValueCollection in .NET
...g the System.Net.Http.Formatting dependency, I believe it is only provided by adding the Microsoft.AspNet.WebApi.Client NuGet package.
– James Skimming
Nov 11 '15 at 18:18
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Use of alloc init instead of new
...+new. You can, however, usually spot the recent Java comers to Objective-C by their dogged use of +new.
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Frame Buster Buster … buster code needed
...e
}
</style>
<script>
if(self == top) {
document.getElementsByTagName("body")[0].style.display = 'block';
}
else{
top.location = self.location;
}
</script>
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