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for..in loops iterate over the entire prototype chain, which is virtually never what you want.
for..in loops iterate over the entire prototype chain, which is virtually never what you want. 意思是使用for..in会遍历整个原型链,这样不是很好的实现方法,推荐使用Object.keys formRu ...
分类:其他好文   时间:2021-04-27 14:24:47    阅读次数:0
How to use Regular Expressions (Regex) in Microsoft Excel both in-cell and loops
How to use Regular Expressions (Regex) in Microsoft Excel both in-cell and loops Regular expressions are used for Pattern Matching. To use in Excel fo ...
分类:其他好文   时间:2021-04-14 12:44:22    阅读次数:0
表连接方法
Oracle表连接方法有四种: 排序合并连接(Sort Merge Join) 嵌套循环连接(Nested Loops Join) 哈希连接(Hash Join) 笛卡尔积(Cartesian Product) 排序合并连接(Sort Merge Join) 排序合并连接是将连接的两个表使用连接列排 ...
分类:其他好文   时间:2021-02-09 12:42:10    阅读次数:0
OpenCL Unrolling Loops优化
可以控制离线编译器将kernel装换位硬件资源的方式。如果kernel中包含循环迭代,可以通过展开循环来提高性能。循环的展开减少了离线编译器执行的迭代次数,但代价是硬件资源消耗的增加。 如果有比较充分的硬件资源,直接在主循环中添加#progma unroll来展开循环。循环的展开会显著地改变离线编译 ...
分类:其他好文   时间:2020-07-29 21:22:34    阅读次数:87
[2020杭电多校第三场]1008 Triangle Collision
唯一难点应该在于怎么转点吧,直接看代码呗。 //#pragma GCC optimize("-Ofast","-funroll-all-loops") //#pragma GCC optimize(2) //freopen("C://std/a.in","r",stdin); //freopen(" ...
分类:其他好文   时间:2020-07-29 17:46:49    阅读次数:81
OpenCL设计优化(基于Intel FPGA SDK for OpenCL)
1、首先了解Intel FPGA SDK for OpenCL实现OpenCL的设计组件,包括: kernels, global memory interconnect, local memory, loops 以及channels (1) Kernels Loops一般是Kernel优化的重点,尤 ...
分类:其他好文   时间:2020-07-24 21:20:09    阅读次数:88
ORACLE表与表联接的几种方式
三大表与表联接方式 1.NESTED LOOPS 嵌套循环 2.HASH JOIN 哈希联接 3.SORT MERGE 排序合并联接 1.NESTED LOOPS 嵌套循环 嵌套循环的本质是将外部数据集连接到内部数据集,对于外部数据集中与单表谓词匹配的每一行,数据库将检索内部数据集中满足连接谓词的所 ...
分类:数据库   时间:2020-07-19 21:11:39    阅读次数:94
1125 Chain the Ropes (25分)
Given some segments of rope, you are supposed to chain them into one rope. Each time you may only fold two segments into loops and chain them into one ...
分类:其他好文   时间:2020-07-18 22:21:25    阅读次数:73
python怎么提高计算速度
下面是python中的一个函数计算代码: loops=25000000 from math import* a=range(1,loops) def f(x): return 3*cos(x)+4*sin(x)**2 %timeit r=(f(x) for x in a) 效率: 1000000 l ...
分类:编程语言   时间:2020-07-03 19:21:16    阅读次数:70
Educational Codeforces Round 87 (Rated for Div. 2) E. Graph Coloring (DFS+DP+状态记录+构造)
You are given an undirected graph without self-loops or multiple edges which consists of nn vertices and mm edges. Also you are given three integers n ...
分类:其他好文   时间:2020-05-19 00:53:03    阅读次数:67
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