本篇随笔将详细的讲解Activity保存状态的概念,也就是saving activity state。一、Activity状态保持概念保存Activity的状态是非常重要的,例如我们在玩一个游戏的时候,突然来了一个电话,这个时候在接听完电话之后我们返回到游戏中,这个时候我们希望游戏还是之前那个进度,...
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其他好文 时间:
2015-05-19 18:14:50
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109
从官网来copy过来的几种模式描述:Scala/JavaPythonMeaningSaveMode.ErrorIfExists(default)"error"(default)When saving a DataFrame to a data source, if data already exis...
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数据库 时间:
2015-05-18 16:09:17
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181
Saving Beans题目抽象:有n颗水果树,每科树上有无穷多个水果(同一棵树上的水果相同)。现在要从这n棵树上取不超过m个水果,有多少种取法。ps:S={n1*a1,n2*a2,n3*a3,……,nn*an}.若m<ni(i=1,2,...n) 则s的m组合...
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其他好文 时间:
2015-05-09 11:27:01
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104
Problem Description
Although winter is far away, squirrels have to work day and night to save beans. They need plenty of food to get through those long cold days. After some time the squirrel family thinks that they have to solve a problem. They suppose th...
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其他好文 时间:
2015-05-08 22:08:36
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156
1.当修改表结构时,弹出"Saving changes is not permitted"的解决方法 "Tools"->"Options"->"Designers"->"Table and Database Designers"->去掉勾选"Prevent saving changes that r...
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数据库 时间:
2015-05-07 18:20:16
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148
The IoT movement in the next few years not only brings us fast-growing product quality, lowering operating expenditures, accelerating business innovation and consumption saving for sustainable society, but also leads to some risk we should approach....
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其他好文 时间:
2015-05-02 15:11:34
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131
19 down vote favorite7I need to save the result of a grep command into a file, but I also want the output file to be formatted and keep the colors jus...
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其他好文 时间:
2015-05-02 01:04:54
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207
分析:简单贪心题,注意这里给出的已经是单价了,而不是物品的总价值,直接用来排序即可。
#include
#include
using namespace std;
struct A
{
int p,m;
}a[105];
bool cmp(A a1,A a2)
{
return a1.p<a2.p;
}
int main()
{
int v,n,i;
int sum;
whil...
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其他好文 时间:
2015-04-30 21:54:50
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249
这篇文章来源于Quroa的一个问答《What are some time-saving tips that every Linux user should know?》—— Linux用户有哪些应该知道的提高效率的技巧。我觉得挺好的,总结得比较好,把其转过来,并加了一些自己的理解。 首先,我想告诉大...
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系统相关 时间:
2015-04-21 20:14:54
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219