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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
...。
新建文件：org.conan.mymahout.recommendation.job.RecommendFactory.java
public final class RecommendFactory {
...
}
1). 构造数据模型
public static DataModel buildDataModel(String file) throws TasteException, IOException {
return new FileDataModel(new File(file))...
How to add test coverage to a private constructor?
...
With Java 8, it is possible to find other solution.
I assume that you simply want to create utility class with few public static methods. If you can use Java 8, then you can use interface instead.
package com.XXX;
public interf...
Algorithm to compare two images
... Hi Tom - do you know of any open-source edge detection libraries, pref in java?
– Richard H
Aug 10 '10 at 9:27
1
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What is the difference between MediaPlayer and VideoView in Android
...ndroid/blob/master/Media/Video/src/com/commonsware/android/video/VideoDemo.java
https://github.com/commonsguy/vidtry/blob/master/src/com/commonsware/android/vidtry/Player.java
and example from android sdk
http://developer.android.com/resources/samples/ApiDemos/src/com/example/android/apis/media/Me...
BigDecimal setScale and round
...tarts from the leftmost nonzero digit of the exact result. docs.oracle.com/javase/7/docs/api/java/math/BigDecimal.html
– Eddy
Sep 6 '16 at 7:06
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How to listen for changes to a MongoDB collection?
...g allowing for trigger/notification-like use cases.
Here is a link to a Java example:
http://mongodb.github.io/mongo-java-driver/3.6/driver/tutorials/change-streams/
A NodeJS example might look something like:
var MongoClient = require('mongodb').MongoClient;
MongoClient.connect("mongodb:/...
Install Application programmatically on Android
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java.lang.NullPointerException: Attempt to invoke virtual method 'android.content.res.XmlResourceParser android.content.pm.ProviderInfo.loadXmlMetaData(android.content.pm.PackageManager, java.lang.String)' on a null object re...
Boolean method naming readability
...m/en-us/dotnet/api/system.io.file.exists developer.android.com/reference/java/io/File#exists()
– Almir
Feb 7 '19 at 11:10
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What is the best IDE to develop Android apps in? [closed]
...te in eclipse. Below is a small tutorial.
Eclipse -> Preference - > Java -> Editor -> Content Assist -> Auto Activation
Now put following in the three given boxes
Auto Activation delay(ms) - 0
Auto activation triggers for java - .(abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXY...
Practical uses for AtomicInteger
... is an example of non-blocking random number generator from Brian Göetz's Java Concurrency In Practice:
public class AtomicPseudoRandom extends PseudoRandom {
private AtomicInteger seed;
AtomicPseudoRandom(int seed) {
this.seed = new AtomicInteger(seed);
}
public int nextI...