split

Haskell: Splitting list into tuple of two new lists

由 心已入冬 提交于 2020-03-21 19:14:28
问题 I am having difficulty figuring out how to split a list of Ints into a tuple containing two new lists, such that every element (starting with first) goes into the first list and every other element in the second. Like so: split [] = ([],[]) split [1] = ([1],[]) split [1,2] = ([1],[2]) split [1,2,3] = ([1,3],[2]) split [1,2,3,4] = ([1,3],[2,4]) I'm trying to accomplish this recursively(with guards) and only using the single argument xs This is my approach that keeps getting error messages:

Javascript: split string into 2d array

由 孤街醉人 提交于 2020-03-21 12:01:59
问题 I have a string of month and years: var months= "2010_1,2010_3,2011_4,2011_7"; I want to make this into a 2d array with the year in the first position of each array and the month in the second position. In other words, I want to end up with this: var monthArray2d = [[2010,1],[2010,3][2011,4],[2011,7]]; The way I do this currently is: //array of selected months var monthArray = months.split(","); //split each selected month into [year, month] array var monthArray2d = new Array(); for (var i =

LC410. Split Array Largest Sum

由 社会主义新天地 提交于 2020-03-20 11:01:28
把一个数组分成m个连续子数组（不能有空数组），求所有分法中，子数组sum的最大值的最小值。 方法1：容易想到的是动态规划 dp[i][j] = min(max(dp[k-1][j-1], sum[k][i]) 1 <= k <= i, dp[i][j]表示用前i个数字，分成j组，最大和的最小值 time：$O(nnm)$ space：$O(nm)$ class Solution { public: typedef long long ll; ll INF = 1e15; int splitArray(vector<int>& nums, int m) { int n = nums.size(); vector<vector<ll>> dp(n + 1, vector<ll>(m + 1, INF)); dp[0][0] = 0; vector<ll> sums(n + 1, 0); for (int i = 0; i < n; ++i) sums[i + 1] = sums[i] + nums[i]; for (int i = 1; i <= n; ++i) { for (int j = 1; j <= m; ++j) { for (int k = 1; k <= i; ++k) { dp[i][j] = min(dp[i][j], max(dp[k - 1][j - 1],

Split configuration file into multiple files

由 强颜欢笑 提交于 2020-03-20 10:01:10
We have three ways to split a large configuration file into multiple small configuration files. Here is the introductions. <linkedConfiguration> The main limitation of this way is the <linkedConfiguration> element is not supported for applications with Windows side-by-side manifests. We can refer to MSDN to get more information. System.Configuration.ConfigurationManager or System.Web.Configuration.WebConfigurationManager The main defect is we must design an architecture by ourself for supporting this. We can refer to MSDN to get more information. Using configSource Base on my understanding,

Split line by multiple points using sf package

由 僤鯓⒐⒋嵵緔 提交于 2020-03-20 03:40:12
问题 I am trying to split a large line shape by pairs of points along the line. Based on previous questions asked mainly by @mbcaradima here, here, here and here, I have put together some code which works for single points, but does not for multiple points. See reproducible example below: Libraries and data # libraries library(tidyverse) library(sf) library(rgdal) library(sp) river <- structure(list(FWK_Code = structure(1L, .Label = "1_F461", class = "factor"), FWK_Name = structure(1L, .Label =

Gini分箱

由 余生颓废 提交于 2020-03-17 23:00:26
def calc_score_median(sample_set, var): ''' 计算相邻评分的中位数，以便进行决策树二元切分 param sample_set: 待切分样本 param var: 分割变量名称 ''' var_list = list(np.unique(sample_set[var])) var_median_list = [] for i in range(len(var_list)-1): var_median = (var_list[i]+var_list[i+1])/2 var_median_list.append(var_median) return var_median_list def choose_best_split(sample_set, var, min_sample): ''' 使用CART分类决策树选择最好的样本切分点 返回切分点 param sample_set: 待切分样本 param var: 分割变量名称 param min_sample: 待切分样本的最小样本量(限制条件) ''' #根据样本评分计算相邻不同分数的中间值 score_median_list = calc_score_median(sample_set, var) median_len = len(score_median_list) sample_cnt

How do I regex split by space, avoiding spaces within apostrophes?

由 左心房为你撑大大i 提交于 2020-03-16 08:45:10
问题 I want "git log --format='(%h) %s' --abbrev=7 HEAD" to be split into [ "git", "log", "--format='(%h) %s'", "--abbrev=7", "HEAD" ] How to I achieve this, without splitting on the space within --format='(%h) %s' ? Answers in any language is welcome :) 回答1: As often in life, you have choices. Use an expression that matches and captures different parts. This can be combined with a replacement function as in import re string = "git log --format='(%h) %s' --abbrev=7 HEAD" rx = re.compile(r"'[^']*'|

「从零单排HBase 05」核心特性region split

由 别说谁变了你拦得住时间么 提交于 2020-03-13 23:32:17
HBase拥有出色的扩展性，其中最依赖的就是region的自动split机制。 1.split触发时机与策略 前面我们已经知道了，数据写入过程中，需要先写memstore，然后memstore满了以后，flush写入磁盘，形成新的HFile文件。 当HFile文件数量不断累积，Region server就会触发compaction机制，把小文件合并为大的HFIle。 当每次flush完成 或者 compaction完成后，regionSplitPolicy就会判断是否需要进行split。 split触发时机简单来说，就是看一个region里面的最大store是否超过阈值。 当然，hbase支持多种策略来设置这个阈值到底怎么计算，这就是触发策略。 0.94版本前默认的策略是ConstantSizeRegionSplitPolicy，这个阈值时一个固定值。 0.94-2.0版本的默认策略是IncreasingToUpperBoundRegionSplitPolicy。 2.0版本的默认策略是SteppingSplitPolicy。这两种策略设置的阈值不是一个固定值，而是会和region所属表在当前regionserver上的region个数有关。只是在计算公式上稍有差异。 另外，还有比如DisableSplitPolicy、KeyPrefixRegionSplitPolicy

PostgreSQL数据库切割和组合字段函数

由 ⅰ亾dé卋堺 提交于 2020-03-12 17:07:13
Postgresql里面内置了很多的实用函数，下面介绍下组合和切割函数 环境：PostgreSQL 9.1.2 CENTOS 5.7 final 一.组合函数 1.concat a.语法介绍 concat(str "any" [, str "any" [, ...]]) Concatenate all but first arguments with separators. The first parameter is used as a separator. NULL arguments are ignored. b.实际例子: postgres=# create table t_kenyon(id int,name varchar(10),remark text); CREATE TABLE postgres=# insert into t_kenyon values(1,'test','kenyon'),(2,'just','china'),(3,'iam','lovingU'); INSERT 0 3 postgres=# insert into t_kenyon values(4,'test',null); INSERT 0 1 postgres=# insert into t_kenyon values(5,null,'adele'); INSERT 0 1

EasyUI Layout 布局_摘

由 匆匆过客 提交于 2020-03-11 11:47:24
EasyUI Layout 布局 通过 $.fn.layout.defaults 重写默认的 defaults。 布局（layout）是有五个区域（北区 north、南区 south、东区 east、西区 west 和中区 center）的容器。中间的区域面板是必需的，边缘区域面板是可选的。每个边缘区域面板可通过拖拽边框调整尺寸，也可以通过点击折叠触发器来折叠面板。布局（layout）可以嵌套，因此用户可建立复杂的布局。 创建布局（Layout） 1、通过标记创建布局（Layout）。 添加 'easyui-layout' class 到 <div> 标记。 <div id="cc" class="easyui-layout" style="width:600px;height:400px;"> <div data-options="region:'north',title:'North Title',split:true" style="height:100px;"></div> <div data-options="region:'south',title:'South Title',split:true" style="height:100px;"></div> <div data-options="region:'east',title:'East',split:true"
订阅 split