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Memoization in Haskell?
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We can do this very efficiently by making a structure that we can index in sub-linear time.
But first,
{-# LANGUAGE BangPatterns #-}
import Data.Function (fix)
Let's define f, but make it use 'open recursion' rather than call itself directly.
f :: (Int -> Int) -> Int -> Int
f...
Re-ordering columns in pandas dataframe based on column name [duplicate]
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df = df.reindex(sorted(df.columns), axis=1)
This assumes that sorting the column names will give the order you want. If your column names won't sort lexicographically (e.g., if you want column Q10.3 to appear after Q9.1), you'll nee...
How to query SOLR for empty fields?
I have a large solr index, and I have noticed some fields are not updated correctly (the index is dynamic).
7 Answers
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Looping over arrays, printing both index and value
... This answer helpfully just explains: ""${!foo[@]}" is the list of all the indexes set in the array".
– pjhsea
Feb 18 '19 at 0:31
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QUERY_STRING、REQUEST_URI、SCRIPT_NAME、PHP_SELF区别 - 更多技术 - 清泛...
...、PHP_SELF区别。实例：
1、http://localhost/aaa/ （打开aaa中的index.php）
$_SERVER['QUERY_STRING'] = "";
$_SERVER['REQUEST_URI'] = "/aaa/";
$_SERVER['SCRIPT_NAME'] = "/aaa/index.php";
$_SERVER['PHP_SELF'] = "/aaa/index.php";
2、http://localhost/aaa/index.php?p=222&q=333...
Detect and exclude outliers in Pandas data frame
...lumn satisfy the
constraint.
Finally, result of this condition is used to index the dataframe.
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Delaying AngularJS route change until model loaded to prevent flicker
.../www.youtube.com/watch?v=P6KITGRQujQ&list=UUKW92i7iQFuNILqQOUOCrFw&index=4&feature=plcp , which helped me quite a bit
Should it interest you I've decided to also paste my own code (Written in coffeescript) so you can see how I got it working.
FYI, in advance I use a generic controller ...
Replacement for Google Code Search? [closed]
...er. The only problem with SymbolHound was the small number of sites it has indexed. The search[code] engine was also promising at that time.
Many of the sites I've reviewed have since been discontinued completely or have disabled their code search functionality. Krugle and search[code] seem to be c...
Ruby: How to turn a hash into HTTP parameters?
...127.0.0.1 at 2011-03-10 11:19:40 -0600 Processing by SitesController#index as HTML Parameters: {"a"=>"a", "b"=>["c", "d", "e"]}
– Gabe Martin-Dempesy
Mar 10 '11 at 17:21
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How to retrieve GET parameters from javascript? [duplicate]
...[];
var items = location.search.substr(1).split("&");
for (var index = 0; index < items.length; index++) {
tmp = items[index].split("=");
if (tmp[0] === parameterName) result = decodeURIComponent(tmp[1]);
}
return result;
}
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