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  • pitch2022-08-13 14:03:09

    "Pitch" is widely used to describe the distance between repeated elements in a structure possessing translational [of or relating to uniform movement without rotation, 平移] symmetry: Pitch (gear), the distance between a point on one tooth [齿轮的牙]

  • MySQL实战45讲 102022-07-23 22:36:02

    10 | MySQL为什么有时候会选错索引? 使用哪个索引是由 MySQL 来确定的 可能遇到的情况:一条本来可以执行得很快的语句,却由于 MySQL 选错了索引,而导致执行速度变得很慢 先建一个简单的表,表里有 a、b 两个字段,并分别建上索引: CREATE TABLE `t` ( `id` int(11) NOT NULL, `a` int(1

  • AtCoder Beginner Contest 260 F - Find 4-cycle2022-07-18 13:02:54

    题目传送门:F - Find 4-cycle (atcoder.jp)   题意: 给定一个无向图,其包含了S、T两个独立点集(即S、T内部间的任意两点之间不存在边),再给出图中的M条边(S中的点与T中的点之间的边)。 求图中包含的一个四元环,若存在则输出环中包含的顶点,否则输出-1。   思路: 首先,四元环只能是由两个S中

  • mysql between 包含边界吗?2022-07-15 11:32:50

    很多时候需要卡一个区间 就要判断包含边界情况 先说答案 包含 版本 mysql> SELECT VERSION(); +-----------+ | VERSION() | +-----------+ | 5.7.26 | +-----------+ 1 row in set (1.06 sec) 对象 :业务主键 mysql> select id from alarm_detector; +----+ | id | +----+ |

  • flex布局justify-content使用between或者around,最后一行左对齐2022-07-11 14:05:22

    问题:在使用flex布局,justify-content:space-between/space-around 最后一行的子元素,经常不是我们想要的。我们希望最后一行是左对齐。 解决办法: 办法1:使用grid布局 .wrap {     width: 100%;     border: 1px solid royalblue;     display: grid;     grid-gap:

  • mysql必知必会(四):过滤2022-07-08 14:05:12

    WHERE子句操作符 操作符 说明 = 等于 <> 不等于 != 不等于 < 小于 <= 小于等于 > 大于 >= 大于等于 BETWEEN 在指定的两值之间 AND 并且 OR 或者 IN 在指定条件范围内 NOT 否定后面的条件 <>和 != 是等价的 参考这篇文章:《Mysql-语句中“!=”与

  • CSS API2022-07-07 22:35:58

    margin (1) 如果一侧定值,一侧auto,则auto为剩余空间大小 (2) 如果两侧均是auto,则平分剩余空间 应用: 制作footer 可以用space-between代替

  • flex space-between 均分换行,不够一行的时候从左侧开始2022-06-16 14:00:14

    *{ margin: 0; padding: 0; list-style: none; } .flex-wrap{ width: 600px; display: flex; border: 15px solid #0077AA;

  • geotools:Shortest distance between a line segment and a point in WGS84 crs using geotools api2022-05-26 19:33:24

    In geotools you can find distance between two geometries using the distance function in Geometry class. There is a Point subclass of Geometry but no line segment subclass of Geometry. There is however LineSegment class which derives from LineString which

  • SQL 运算符2022-05-21 00:00:50

    比较运算符 常用的比较运算符有 =(等于) 、!=(不等于)、 <>(不等于)、<(小于)、<=(小于等于)、>(大于)、>=(大于等于),其中 != 和 <> 在特殊情况下用法是不同的,这里暂时不提。 比较运算符常常与 WHERE 在一起使用。WHERE 用于逻辑判断,WHERE 后面写判断的条件,满足条件的语句会被筛选出来。 W

  • oracle-获取拼音2022-05-18 17:00:46

    CREATE OR REPLACE FUNCTION FN_GETPY(p_str IN VARCHAR2, p_flag NUMBER DEFAULT NULL) RETURN VARCHAR2 AS v_compare VARCHAR2(4); v_return VARCHAR2(4000); v_length INT := 0; v_substr VARCHAR2(4); FUNCTION fn

  • Cypher Fundamentals-Creating Relationships2022-05-05 23:31:47

    Cypher Fundamentals Reading Data from Neo4j Introduction to Cypher Retrieving Nodes Finding Relationships Traversing Relationships Finding Emil Filtering Queries Finding Specific Actors Writing Data to Neo4j Creating Nodes Creating a Node Creating

  • MySQL - SELECT - 语句2022-04-30 10:34:18

    限制语句 distinct DISTINCT 关键词用于返回唯一不同的值。 也就是:自动去重 使用 select distinct studentno,courseno -> from score -> where daily >90 and 当有两个限制条件时候,使用and连接 使用 -> where courseno='c08126' and daily between 85 and 100; 范围

  • Kentico WITH AllData AS 以及Between and2022-04-24 15:34:29

    c:\workspace\company\kentico\source\kentico12\DataEngine\Database\Helpers\SqlHelper.cs   /// <summary>        /// Gets a nested query using WITH for further evaluation        /// </summary>        private static string GetWithQuery(st

  • Java8中使用java.time.temporal.ChronoUnit辅助类计算两个ZonedDateTime日期对象的间隔月、间隔天数、间隔小时、间隔分钟数2022-03-27 13:00:08

    直接贴代码: import java.time.temporal.ChronoUnit;  @Test    public void test计算两个ZonedDateTime日期的间隔时间() {        ZonedDateTime start = ZonedDateTime.of(2022,3,27,10,0,0,0, ZoneId.systemDefault());        ZonedDateTime end = ZonedDateTime.o

  • border, boundary2022-02-19 01:05:17

    The boundary of an area of land is an imaginary line that separates it from other areas. The Mississippi River [密西西比河] forms a natural boundary between Iowa [爱荷华州] and Illinois [伊利诺伊州]. The stream curves round to mark the boundary of his prope

  • 优化sql2022-02-11 12:02:35

    1.对于连续的数值,能用between 就不用 in   例如:select id from t between 1 and 3 2. 3.避免对字段进行函数运算 4.用exists代替in    5.     

  • SQL-3(数据筛选)2022-02-09 23:04:06

    数据筛选 演出信息管理 WHERE 子句 ①WHERE 子句:根据WHERE子句中的条件筛选数据   此句根据SLECET...FORM....中使用 ②数值筛选 1. 等于:= 2. 不等于:<>(部分 DBMS 也支持 !=) 3. 小于:< 4. 小于等于:<= 5. 大于:> 6 .大于等于:>=   PS:写 WHERE 子句时,我们只需要把 待查询的

  • Leetcode 1509. Minimum Difference Between Largest and Smallest Value in Three Moves [Python]2022-02-05 17:31:53

    可处理三次,那么能处理的其实是“丢掉”3个最小的数字或者3个最大的数字,或者6个数字里选3个(最小,次小,最大)(最小,次大,最大),所以也就是要在这4种subarray中选出最大最小值差最小的那个。 先sort,选出上述4种newnums。计算差值,找最小。 class Solution: def minDifference(self, n

  • GDUT_专题三:F - Built?2022-02-04 13:03:51

    题目: There are towns on a plane. The -th town is located at the coordinates . There may be more than one town at the same coordinates.Ni(xi​,yi​) You can build a road between two towns at coordinates and for a cost of yen (the currency of Japan). It

  • mysql中between and或大于小于查时间,单双引号问题2022-02-03 11:58:02

    mysql查询时间时,between and和大于小于都可以 单引号,双引号都可以加在时间上,结果一样 以下sql文查询结果都一样 SELECT * FROM tb_user where birthday between '2021-01-01' and '2021-05-05'; SELECT * FROM tb_user where birthday between "2021-01-01" and "2021-05-0

  • Boolean operations between triangle meshes(转)2022-01-24 15:01:04

      Abstract. Boolean operations is one of basic and well known on 3D models. The operations are widely used in computer graphics, game, CAD, EDA. The blog introduce the function in some open source program.  Key Words. Boolean Operations, Mesh,

  • ApkToolBoxGUI 0.0.8发布了!!2022-01-08 13:02:53

    https://github.com/jiangxincode/ApkToolBoxGUI APKToolBoxGUI是一个程序员常用的小工具合集,有个比较友好的交互界面。主要包含编码转换,时间戳转换,颜色拾取器,颜色转换,重复文件查找,批量文件重命名,文件摘要检查等。另外还有些专门为Android开发定制的小工具,比如带界面的Monkey,国际

  • 【py.checkio】【HOME】Between Markers2021-12-25 15:05:27

    题目:在text中找出begin,end之间的子字符串; 我的代码: def between_markers(text: str, begin: str, end: str) -> str: """ returns substring between two given markers """ # your code here if begin not in text and end not

  • 弹性布局2021-12-24 23:02:25

    sapce-between和space-around都是使元素均匀分布,但space-between是使元素贴边对齐,而space-around是不使元素贴边,有空隙 用图片表示就是:      

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