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| <h2 title="Class RandomUtils" class="title">Class RandomUtils</h2> |
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| <pre>public final class <span class="typeNameLabel">RandomUtils</span> |
| extends <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a></pre> |
| <div class="block"><p> |
| The source of random stuff for the whole project. This lets us make all randomness in the project |
| predictable, if desired, for when we run unit tests, which should be repeatable. |
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| <td class="colFirst"><code>static int</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/mahout/common/RandomUtils.html#MAX_INT_SMALLER_TWIN_PRIME">MAX_INT_SMALLER_TWIN_PRIME</a></span></code> |
| <div class="block">The largest prime less than 2<sup>31</sup>-1 that is the smaller of a twin prime pair.</div> |
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| <td class="colFirst"><code>static <a href="../../../../org/apache/mahout/common/RandomWrapper.html" title="class in org.apache.mahout.common">RandomWrapper</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/mahout/common/RandomUtils.html#getRandom--">getRandom</a></span>()</code> </td> |
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| <td class="colFirst"><code>static <a href="http://docs.oracle.com/javase/7/docs/api/java/util/Random.html?is-external=true" title="class or interface in java.util">Random</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/mahout/common/RandomUtils.html#getRandom-long-">getRandom</a></span>(long seed)</code> </td> |
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| <td class="colFirst"><code>static int</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/mahout/common/RandomUtils.html#hashDouble-double-">hashDouble</a></span>(double value)</code> </td> |
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| <td class="colFirst"><code>static int</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/mahout/common/RandomUtils.html#hashFloat-float-">hashFloat</a></span>(float value)</code> </td> |
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| <td class="colFirst"><code>static int</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/mahout/common/RandomUtils.html#nextTwinPrime-int-">nextTwinPrime</a></span>(int n)</code> |
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| Finds next-largest "twin primes": numbers p and p+2 such that both are prime.</div> |
| </td> |
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| <td class="colFirst"><code>static void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/mahout/common/RandomUtils.html#useTestSeed--">useTestSeed</a></span>()</code> </td> |
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| <h4>MAX_INT_SMALLER_TWIN_PRIME</h4> |
| <pre>public static final int MAX_INT_SMALLER_TWIN_PRIME</pre> |
| <div class="block">The largest prime less than 2<sup>31</sup>-1 that is the smaller of a twin prime pair.</div> |
| <dl> |
| <dt><span class="seeLabel">See Also:</span></dt> |
| <dd><a href="../../../../constant-values.html#org.apache.mahout.common.RandomUtils.MAX_INT_SMALLER_TWIN_PRIME">Constant Field Values</a></dd> |
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| <pre>public static <a href="../../../../org/apache/mahout/common/RandomWrapper.html" title="class in org.apache.mahout.common">RandomWrapper</a> getRandom()</pre> |
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| <pre>public static <a href="http://docs.oracle.com/javase/7/docs/api/java/util/Random.html?is-external=true" title="class or interface in java.util">Random</a> getRandom(long seed)</pre> |
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| <pre>public static int nextTwinPrime(int n)</pre> |
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| Finds next-largest "twin primes": numbers p and p+2 such that both are prime. Finds the smallest such p |
| such that the smaller twin, p, is greater than or equal to n. Returns p+2, the larger of the two twins. |
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