前面已经说过选择结构了其实他和for相差不是太大,现在就来说说循环结构。循环结构有三种形式!1
for 2.while 3.do while 这三种都可以循环,不过他们之间还是有区别的,for和while是要先验证条件,如果条件满足才执行循环体,而后者do
while是不管条件是否满足都要执...
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其他好文 时间:
2014-05-10 20:03:50
阅读次数:
326
sed‘s/^/\//g‘4行首增加指定字符提取网页中的播放地址:#!/bin/bash
printf"enteryourdir:"
readdir
echo"$dirisxx"
cd$dir
echo`pwd`
forfilein`ls.`
do
if[-d$file];then
echo$file
cd$file
echo`pwd`
tree`pwd`|grepplay|sed‘s/.*//g‘>11
tree`pwd`|grepplay|sed‘s/.*//g..
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其他好文 时间:
2014-05-03 00:53:15
阅读次数:
336
Lease 的机制:hdfs支持write-once-read-many,也就是说不支持并行写,那么对读写的互斥同步就是靠Lease实现的。Lease说白了就是一个有时间约束的锁。客户端写文件时需要先申请一个Lease,对应到namenode中的LeaseManager,客户端的client name就作为一个lease的holder,即租约持有者。LeaseManager起什么作用呢?
读写过程的容错是怎么做的?数据块是如何复制的?数据块的恢复机制?本文都有涉及。...
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其他好文 时间:
2014-05-02 23:22:14
阅读次数:
450
Shaass has decided to hunt some birds. There are n horizontal electricity wires aligned parallel to each other. Wires are numbered 1 to n from
top to bottom. On each wire there are some oskols sitti...
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其他好文 时间:
2014-05-02 20:48:26
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462
题目链接:
http://acm.zju.edu.cn/onlinejudge/showProblem.do?problemCode=3749
Chameleon
Time Limit: 6 Seconds Memory Limit: 65536 KB
Given n groups of integers(all the integers are distin...
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其他好文 时间:
2014-05-02 19:06:34
阅读次数:
447
“参考Lua游戏开发实践指南”
Lua提供两种控制结构(数字型和通用型)--Lua中的for语句的索引是从1开始的 数字型: 一个简单的示例如下1 for indx = 1, 10 do2
print(indx)3 end do关键字标记程序块的开始,end标记程序块的结束。 ...
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其他好文 时间:
2014-05-02 17:26:51
阅读次数:
702
Write an efficient algorithm that searches for
a value in anmxnmatrix. This matrix has the following properties:Integers in
each row are sorted from l...
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其他好文 时间:
2014-05-02 10:41:53
阅读次数:
267
Problem
A Communist regime is trying to redistribute wealth in a village. They have have decided to sit everyone around a circular table. First, everyone has converted all of their properties to co...
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其他好文 时间:
2014-05-02 10:30:59
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375
Problem C: The Dragon of Loowater
Once upon a time, in the Kingdom of Loowater, a minor nuisance turned into a major problem.
The shores of Rellau Creek in central Loowater had always been a prime...
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其他好文 时间:
2014-05-02 10:07:09
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402
Reverse a linked list from positionmton. Do it
in-place and in one-pass.For example:Given1->2->3->4->5->NULL,m=
2 andn= 4,return1->4->3->2->5->NULL.No...
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其他好文 时间:
2014-05-02 09:10:46
阅读次数:
252