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属性只有一个值的这类 html 属性是怎么回事,该如何设置值;比如:checked = “checked” vs checked = true
参考链接:https://stackoverflow.com/questions/10650233/checked-checked-vs-checked-true 问: 1 What is the difference between the below two usages? 2 3 docume ...
分类:Web程序   时间:2018-01-19 11:49:05    阅读次数:191
set集合操作
python的set和其他语言类似, 是一个无序不重复元素集, 基本功能包括关系测试和消除重复元素. 集合对象还支持union(联合), intersection(交), difference(差)和sysmmetric difference(对称差集)等数学运算. sets 支持 x in set ...
分类:其他好文   时间:2018-01-17 13:46:35    阅读次数:99
PAT 1038. Recover the Smallest Number
Given a collection of number segments, you are supposed to recover the smallest number from them. For example, given {32, 321, 3214, 0229, 87}, we can ...
分类:其他好文   时间:2018-01-17 12:36:01    阅读次数:128
[leetcode]Binary Search Tree-530. Minimum Absolute Difference in BST
Given a binary search tree with non-negative values, find the minimum absolute difference between values of any two nodes. Example: Input: 1 \ 3 / 2 O ...
分类:其他好文   时间:2018-01-13 21:01:44    阅读次数:203
[leetcode]Math-413. Arithmetic Slices
A sequence of number is called arithmetic if it consists of at least three elements and if the difference between any two consecutive elements is the ...
分类:其他好文   时间:2018-01-13 20:53:25    阅读次数:104
Binary Search Tree-530. Minimum Absolute Difference in BST
Given a binary search tree with non-negative values, find the minimum absolute difference between values of any two nodes. Example: Note: There are at ...
分类:其他好文   时间:2018-01-13 11:22:06    阅读次数:148
UVA 12307 Smallest Enclosing Rectangle
https://vjudge.net/problem/UVA-12307 求覆盖所有点的最小矩形面积、周长 相当于求凸包的最小面积外接矩形、最小周长外接矩形 结论: 这个矩形一定有一条边和凸包上一条边重合 证明去看https://wenku.baidu.com/view/f11d0836ee06ef ...
分类:其他好文   时间:2018-01-09 22:11:15    阅读次数:248
Python_Tips[6] -> is 和 == 的区别
is和==的区别 / Difference between is and == 对于Python的对象来说,具有id/type/value三种特性,而在判断两个相等的is和==中,分别是对对象的id和value进行判断,以下例子可以看出两者的不同之处, 从查看的结果来看,x和y的值相同,但是id却不 ...
分类:编程语言   时间:2018-01-07 14:29:16    阅读次数:157
Difference Between Session.run and Tensor.eval
【Question】: TensorFlow has two ways to evaluate part of graph: Session.run on a list of variables and Tensor.eval. Is there a difference between these ...
分类:其他好文   时间:2018-01-05 01:24:35    阅读次数:171
identity in sql server
https://stackoverflow.com/questions/1920558/what-is-the-difference-between-scope-identity-identity-identity-and-ide The @@identity function returns th ...
分类:数据库   时间:2018-01-02 18:43:21    阅读次数:127
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