1.2 实现原理 private static final class RandomNumberGeneratorHolder { static final Random randomNumberGenerator = new Random(); } public static double random() { return RandomNumberGeneratorHolder.randomNumberGenerator.nextDouble(); } 1. 2. 3. 4. 5. 6. 7. 先获取一个Random对象,在Math中是单例...
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1. 首次调用,因为temp = yield i为赋值语句,先执行右边代码,当执行到yield时,暂停执行,并把i返回回去,so ,打印 0 2. 第二次调用,从yield i开始,可以把yiedl i作为一个代码块,赋值给temp,此时没传值,所以打印为None,其他正常执行 3. 第三次调用,通过send方法,传递参数,这时候相当于把参数赋值给temp,所以...
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MVVMFramework- (OC版)总结整理下一个快速开发框架,分离控制器中创建tableView和collectionView的代码,已加入cell自适应高度,降低代码耦合,提高开发效率。 react-native-config- Bring some 12 factor love to your mobile apps. react-native-syan-image-picker- React-Native 多图片选择 支持裁剪 压缩. ...
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2 * Creates a new random number generator. This constructor sets 3 * the seed of the random number generator to a value very likely 4 * to be distinct from any other invocation of this constructor. 5 */ 6 public Random() { 7 this(seedUniquifier() ^ System.nanoTime()); ...