大约有 1,100 项符合查询结果（耗时：0.0111秒） [XML]
Converting a Uniform Distribution to a Normal Distribution
... next call for a sample, you return the cached value.
Box-Muller gives a Z-score
You have to then scale the Z-score by the standard deviation and add the mean to get the full value in the normal distribution.
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NoSQL (MongoDB) vs Lucene (or Solr) as your database
...as no map reduce functionality. Therefore reporting, stats, computation of scores etc. are not possible! Use Solr only if you have/ can threat your data as text data
– Roland Kofler
Dec 4 '11 at 8:23
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How to sort an array by a date property
...multiple criteria if you return an array of values:
// Sort by date, then score (reversed), then name
array.sortBy(function(o){ return [ o.date, -o.score, o.name ] };
See http://phrogz.net/JS/Array.prototype.sortBy.js for more details.
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JavaScript chop/slice/trim off last character in string
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edited Sep 20 '19 at 17:14
dota2pro
4,2253...
Make header and footer files to be included in multiple html pages
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@Justin808 - the OP mentions nothing about a local hosted installation, so I presumed he was talking about server based files.
– Sol
Apr 25 '15 at 5:49
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How to define different dependencies for different product flavors
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To define a flavor specific dependency you can use proCompile instead of compile in your dependency section. When you run gradle properties you get an overview of automatic created configurations.
The correct build file looks like this:
buildscript {
repositories {
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How to concatenate string variables in Bash
...use #!/bin/sh in a script using this construction.
– Score_Under
Apr 28 '15 at 16:40
2
It's speci...
从源代码剖析Mahout推荐引擎 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
... trainPt) throws TasteException {
System.out.printf("%s Evaluater Score:%s\n", type.toString(), buildEvaluator(type).evaluate(rb, mb, dm, trainPt, 1.0));
}
public static void evaluate(RecommenderEvaluator re, RecommenderBuilder rb, DataModelBuilder mb, DataModel dm, double train...
Select rows which are not present in other table
...ster.
NOT IN
Only good without NULL values or if you know to handle NULL properly. I would not use it for this purpose. Also, performance can deteriorate with bigger tables.
SELECT ip
FROM login_log
WHERE ip NOT IN (
SELECT DISTINCT ip -- DISTINCT is optional
FROM ip_location
);
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Draw text in OpenGL ES
...to render text on top of the rendered frame (like a HUD with the player´s score etc). The text would need to use a custom font also.
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