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背景色默认值引出的一系列问题
刚看到代码中有大量的xx.backgroundColor = [UIColor clearColor];(1)很好奇,默认的背景色是什么值?官方给出的:默认为nil,此时背景是透明的。然后clearColor的备注也写明了:“0.0 white, 0.0 alpha”(白色,但alpha为0),所以...
分类:其他好文   时间:2015-08-17 11:26:18    阅读次数:121
zoj 1028 Flip and Shift(数学)
Flip and ShiftTime Limit: 2 Seconds Memory Limit: 65536 KBThis puzzle consists of a random sequence of m black disks and n white disks on an oval-s...
分类:其他好文   时间:2015-08-16 15:13:15    阅读次数:126
Engineer in the White Spaces
?Engineer in the White SpacesMichael NygardA SySTEM ConSiSTS oF inTERdEpEndEnT pRogRAMS. We call the arrangement of these programs and their relationships architecture. When we diagram these systems, w...
分类:其他好文   时间:2015-08-16 10:47:44    阅读次数:97
fabric带颜色的输出类(color)
1.调用方法:fromfabricimportcolors2.方法:printcolors.blue(string)#蓝printcolors.red(string)#红printcolors.cyan(string)#浅蓝printcolors.green(string)#绿printcolors.magenta(string)#紫printcolors.white(string)#白printcolors.yellow(string)#黄3.练习:#!/bin/env..
分类:其他好文   时间:2015-08-16 00:49:50    阅读次数:136
如何让超出范围的文本自动显示为省略号(CSS)
溢出文本显示省略号的效果: white-space:nowrap;  强制文本在一行显示 overflow:hidden;   溢出内容为隐藏 text-overflow:ellipsis;  当对象内文本溢出时显示省略标记(...)...
分类:Web程序   时间:2015-08-15 11:58:31    阅读次数:149
hdu5113 Black And White(dfs+剪枝)
题目链接:点击打开链接 题意描述:给一个n*m的棋盘,现在有k种颜色的涂料,每种涂料可以使用ai次。求能否找出一种方案,给所有的格子染色,保证相邻的格子之间颜色不同。如果存在给出任意一种解决方案;否则输出NO 解题思路:dfs+剪枝 由于题目中棋盘最大为5×5所以可以考虑使用dfs,染色问题有一个结论貌似是:(剩余的格子的数量+1)>= 任意一种涂料的个数,否则染色必然失败。因此我们...
分类:其他好文   时间:2015-08-14 13:55:10    阅读次数:110
LeetCode OJ平台Sort Colors讨论主题算法
原题如下面,这意味着无序排列(由0,1,2组成)。一号通。组织成若干阵列0-几个1-几个2这样的序列。Given an array with n objects colored red, white or blue, sort them so that objects of the same col...
分类:编程语言   时间:2015-08-13 19:38:50    阅读次数:124
Flip Game
Description Flip game is played on a rectangular 4x4 field with two-sided pieces placed on each of its 16 squares. One side of each piece is white and the other one is black and each piece is lying e...
分类:其他好文   时间:2015-08-13 18:03:24    阅读次数:129
poj 2488 A Knight's Journey
poj 2488 A Knight's JourneyDescriptionBackground The knight is getting bored of seeing the same black and white squares again and again and has decide...
分类:其他好文   时间:2015-08-13 17:24:10    阅读次数:89
POJ-1753 Flip Game (BFS+状态压缩)
DescriptionFlip game is played on a rectangular 4x4 field with two-sided pieces placed on each of its 16 squares. One side of each piece is white and ...
分类:其他好文   时间:2015-08-13 08:49:56    阅读次数:129
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