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MYSQL ifelse语句
SET GLOBAL log_bin_trust_function_creators = 1; DELIMITER $$ CREATE FUNCTION pro_salary_grade( salary INT) RETURNS CHAR BEGIN DECLARE grade CHAR DEFAU ...
分类:数据库   时间:2020-04-06 15:49:34    阅读次数:2137
决策树
from math import log import operator """ 函数说明:计算给定数据集的经验熵(香农熵) Parameters: dataSet:数据集 Returns: shannonEnt:经验熵 Modify: 2018-03-12 """ def calcShannonE ...
分类:其他好文   时间:2020-04-03 12:24:45    阅读次数:81
离我最近距离 sql
CREATE FUNCTION getDistance (latl FLOAT, lonl FLOAT, lat2 FLOAT, lon2 FLOAT)RETURNS FLOATDETERMINISTIC RETURN ROUND(6378.138 * 2 * ASIN(SQRT(PON(SIN(( ...
分类:数据库   时间:2020-04-02 01:07:12    阅读次数:85
js日期格式化
/** * @param {number} date * @param {string} fmt * @returns {string} */ export function formatDate(date, fmt) { if (/(y+)/.test(fmt)) { fmt = fmt.repl ...
分类:Web程序   时间:2020-04-01 16:30:04    阅读次数:87
leetcode 703. Kth Largest Element in a Stream & c++ priority_queue & minHeap/maxHeap
703. Kth Largest Element in a Stream & c++ priority_queue & minHeap/maxHeap 相关链接 "leetcode" "c++ priority_queue cplusplus" "c++ priority_queue cnblog" ...
分类:编程语言   时间:2020-04-01 10:54:46    阅读次数:71
MySql 根据节点查询父节点或子节点
根据节点查询所有子节点 CREATE DEFINER=`root`@`localhost` FUNCTION `getChildList`(rootId varchar(100)) RETURNS varchar(2000) CHARSET latin1 BEGIN DECLARE str varc ...
分类:数据库   时间:2020-03-31 12:44:32    阅读次数:289
Python基础
1. eval() : the eval function evaluates the “String” like a python expression and returns the result as an integer Syntax: eval(expression, [globals[, ...
分类:编程语言   时间:2020-03-30 23:10:12    阅读次数:84
4.微服务-go-micro
go-micro
分类:其他好文   时间:2020-03-30 00:11:53    阅读次数:67
Saltstack module ini 详解
ini.remove_option Remove a key/value pair from a section in an ini file. Returns the value of the removed key, or if nothing was removed. API Example: ...
分类:其他好文   时间:2020-03-28 21:46:58    阅读次数:70
Saltstack module introspect 详解
introspect.service_highstate Return running and enabled services in a highstate structure. By default also returns package dependencies for those serv ...
分类:其他好文   时间:2020-03-28 21:36:42    阅读次数:92
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