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ActivityThread学习
1. 入口。以前一直都说Activity的人口是onCreate方法。其实android上一个应用的入口,应该是ActivityThread。和普通的java类一样,入口是一个main方法。public static final void main(String[] args) { Sampling...
分类:其他好文   时间:2014-07-18 19:24:01    阅读次数:268
[leetcode]Plus One
Plus OneGiven a non-negative number represented as an array of digits, plus one to the number.The digits are stored such that the most significant dig...
分类:其他好文   时间:2014-07-18 16:17:10    阅读次数:249
[leetcode]Palindrome Number
Palindrome NumberDetermine whether an integer is a palindrome. Do this without extra space.click to show spoilers.Some hints:Could negative integers b...
分类:其他好文   时间:2014-07-18 15:17:26    阅读次数:201
UVA 10139 Factovisors(数论)
Factovisors The factorial function, n! is defined thus for n a non-negative integer: 0! = 1 n! = n * (n-1)! (n > 0) We say that a divides b if there exists an integer k such that k*a =...
分类:其他好文   时间:2014-07-17 19:05:06    阅读次数:235
【机器学习算法-python实现】采样算法的简单实现
1.背景    采样算法是机器学习中比较常用,也比较容易实现的(出去分层采样)。常用的采样算法有以下几种(来自百度知道):   一、单纯随机抽样(simple random sampling) 将调查总体全部观察单位编号,再用抽签法或随机数字表随机抽取部分观察单位组成样本。 优点:操作简单,均数、率及相应的标准误计算简单。 缺点:总体较大时,难以一一编号。 二、系统抽样(systemat...
分类:编程语言   时间:2014-07-14 18:08:55    阅读次数:339
执行计划基础 动态采样
1. 统计信息默认情况下是每天晚上10点半后收集,如果新建对象还没来得级收集统计信息,就采用动态采样的方式。 2. 具体在set autotrace 跟踪的执行计划中,可以看到类似:- dynamic sampling used for this statement (level=2) 3. ...
分类:其他好文   时间:2014-07-14 00:31:08    阅读次数:305
Add Two Numbers
You are given two linked lists representing two non-negative numbers. The digits are stored in reverse order and each of their nodes contain a single digit. Add the two numbers and return it as a link...
分类:其他好文   时间:2014-07-13 18:20:52    阅读次数:202
Trapping Rain Water
Givennnon-negative integers representing an elevation map where the width of each bar is 1, compute how much water it is able to trap after raining.Fo...
分类:移动开发   时间:2014-07-10 15:00:57    阅读次数:267
LeetCode——Container With Most Water
Given n non-negative integers a1, a2, ..., an, where each represents a point at coordinate (i, ai). n vertical lines are drawn such that the two endpoints of line i is at (i, ai) and (i, 0). Fin...
分类:其他好文   时间:2014-07-08 14:21:56    阅读次数:190
Plus One
Given a non-negative number represented as an array of digits, plus one to the number.The digits are stored such that the most significant digit is at...
分类:其他好文   时间:2014-07-06 16:11:35    阅读次数:170
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