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RSS订阅原创 时间到数据库自动更新状态
在MySQL中实现根据时间字段自动更改状态字段首先定义update_conference_status过程，判断系统时间与start_time和end_time的关系，根据这两个字段调整status字段的状态。DELIMITER |DROP PROCEDURE IF EXISTS update_conference_status |CREATE PROCEDURE upda...
2018-08-14 10:50:29
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原创 804. Unique Morse Code Words
问题International Morse Code defines a standard encoding where each letter is mapped to a series of dots and dashes, as follows: "a"maps to ".-", "b" maps to "-...", "c" maps to "-.-.", and so on.
2018-08-03 15:23:56
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原创 18. 4Sum
问题Given an array S of n integers, are there elements a, b, c, and d in S such that a + b + c + d = target? Find all unique quadruplets in the array which gives the sum of target.Note: The solution...
2018-04-10 09:36:07
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原创 17. Letter Combinations of a Phone Number
问题Given a digit string, return all possible letter combinations that the number could represent.A mapping of digit to letters (just like on the telephone buttons) is given below.Input:Digit ...
2018-04-10 09:35:54
201
原创 16. 3Sum Closest
问题Given an array S of n integers, find three integers in S such that the sum is closest to a given number, target. Return the sum of the three integers. You may assume that each input would have exa...
2018-04-10 09:35:23
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原创 15. 3Sum
问题Given an array S of n integers, are there elements a, b, c in S such that a + b + c = 0? Find all unique triplets in the array which gives the sum of zero.Note: The solution set must not contain...
2018-04-10 09:34:46
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原创 14. Longest Common Prefix
问题Write a function to find the longest common prefix string amongst an array of strings.分析：最长前缀Pythonclass Solution: def longestCommonPrefix(self, strs): """ :type st...
2018-04-10 09:34:00
143
原创 11. Container With Most Water
问题Given n non-negative integers a1, a2, …, an, where each represents a point at coordinate (i, ai). n vertical lines are drawn such that the two endpoints of line i is at (i, ai) and (i, 0). Find tw...
2018-04-10 09:33:35
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原创 7. Reverse Integer
问题Given a 32-bit signed integer, reverse digits of an integer.Example 1:Input: 123Output: 321Example 2:Input: -123Output: -321Example 3:Input: 120Output: 21Note: Assume w...
2018-04-10 09:32:32
137
原创 4. Median of Two Sorted Arrays
问题There are two sorted arrays nums1 and nums2 of size m and n respectively.Find the median of the two sorted arrays. The overall run time complexity should be O(log (m+n)).Example 1:nums1 = ...
2018-04-10 09:28:39
131
原创 3. Longest Substring Without Repeating Characters
描述Given a string, find the length of the longest substring without repeating characters.Examples:Given "abcabcbb", the answer is "abc", which the length is 3.Given "bbbbb", the answer is "b", ...
2018-04-10 09:24:52
230
原创 django 数据库迁移(migrate)应该知道的一些事
命令首先数据库迁移的两大命令： python manage.py makemigrations & python manage.py migrate 前者是将model层转为迁移文件migration，后者将新版本的迁移文件执行，更新数据库。 这两中命令调用默认为全局，即对所有最新更改的model或迁移文件进行操作。如果想对部分app进行操作，就要在其后追加app name：$ python
2017-04-08 20:07:43
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原创 elasticsearch内存管理
今天elasticsearch突然崩掉了，捉急，看看log是这样的：$ cat elasticsearch-5.2/logs/zhujian_club.log[2017-04-05T13:23:43,919][INFO ][o.e.n.Node ] [] initializing ...[2017-04-05T13:23:44,337][INFO ][o.e.e.No
2017-04-05 15:46:49
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原创 Elasticsearch 2.3.4 + Elasticsearch-jdbc 2.3.4.1 + analysis-ik 1.9.4搭建后端中文分词搜索引擎
Elasticsearch 2.3.4 + Elasticsearch-jdbc 2.3.4.1 + analysis-ik 1.9.4搭建后端中文分词搜索引擎
2017-03-30 16:16:53
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原创 在virtualenv虚拟环境下使用pip
在virtualenv虚拟环境下使用pip今天在virtualenv环境下使用pip安装django的时候出现pip权限不够的问题，[PS：又是权限的问题] 经过一番折腾，将正确姿势写一下。
2016-10-04 17:15:09
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原创 使用unittest扩展功能测试
以TDD模式开发一款软件，它的核心是以测试驱动开发，即先有测试再去开发。编写新的功能测试时，可以先写注释，勾勒出用户故事的重点（需求的实例过程）。这样写出的测试可读性强。以后将以一个待办事务清单的web应用为例，进行TDD敏捷开发。
2016-09-22 10:03:31
801
原创 django_模板
基础{{ person_name }} 变量{% if ordered_warranty %} 模板标签(template tag) ： 仅通知模板系统完成某些工作的标签。比如if标签for标签{{ship_date|date:”F j, Y” }} filter过滤器将变量ship_date传递给date过滤器，同时指定参数”F j,Y”。date过滤器根据参数进行格式输出。 过滤器是用管
2016-05-03 17:46:32
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原创 Git for PyCharm
Git for PyCharmUsing PyCharm’s Git integration locally：http://confluence.jetbrains.com/display/PYH/Using+PyCharm%27s+Git+integration+locally创建git集project创建gitAlt+`显示VCS命令(或者选择VCS->VCS Operations Popup
2016-05-03 17:43:34
533
空空如也
大数据分析对数学建模的应用
2016-06-29
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