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20151009学习内容:各类函数
--聚合函数:max , min , sum ,avg ,countselect min(oil),max(oil),sum(price) from car--放在select from 中间使用,聚合函数和聚合函数放在一起使用goselect COUNT(*)from cargoselec...
分类:其他好文   时间:2015-11-05 00:28:39    阅读次数:220
Python编写购物车程序
本人不善言辞,不废话,直接上代码:#!/usr/bin/envpython #-*-coding:utf-8-*- #_authbykk defgoods_list(): shangpin={"iphone":"6000","MacAir":"15000","tea":"50","book":"30"} print"-"*12+u"商品列表"+"-"*12 forkeyinshangpin: print"goods:%s-->price:%s"%(key,s..
分类:编程语言   时间:2015-11-04 19:45:53    阅读次数:173
浅析Oracle中的不等于号
前几天碰到一个关于Oracle不等于的问题,最后搜索了一下,发现下面资料,拿来跟大家分享一下,需要的朋友可以参考下关于Oracle中的不等于号: 在Oracle中, != ~= ^= 都是不等于号的意思。都可以使用。 但是奇怪是的, 我想拿出price不是180000的商品时:(price是Num....
分类:数据库   时间:2015-11-04 16:04:26    阅读次数:140
Best Time to Buy and Sell Stock II
题目:Say you have an array for which theithelement is the price of a given stock on dayi.Design an algorithm to find the maximum profit. You may complet...
分类:其他好文   时间:2015-11-03 13:48:38    阅读次数:191
Best Time to Buy and Sell Stock
题目:Say you have an array for which theithelement is the price of a given stock on dayi.If you were only permitted to complete at most one transaction ...
分类:其他好文   时间:2015-11-03 09:13:51    阅读次数:142
Python 字符串格式化示例
先看代码吧。#!/usr/bin/env python#-*- coding: utf-8 -*-__author__ = 'jiang'__creattime__ = '2015/10/31 23:40'width = input('please enter width:')price_wid.....
分类:编程语言   时间:2015-11-01 10:13:44    阅读次数:266
4.json解析
格式{"name":"zhangsan", "age":18, "books":[{"name":"金瓶","price":10}, {"name":"红楼梦","price":20}]}解析1.JSONObject [{"id":"5","version":"5.5","name":"A
分类:Web程序   时间:2015-10-27 23:25:47    阅读次数:419
通过js实现删除功能 ruby on rails
(1)首先给删除按钮增加一个属性 remote: true,这样ujs将这个click动作转化为ajax调用,app/views/products/_product.html.erb"> _name"> _price"> _description"> t("helpers....
分类:Web程序   时间:2015-10-27 20:16:10    阅读次数:182
数组中的对象,判断是否有重复值、
蛋疼,销售中有重复商品上报 var arry = [ { itemType: "1", item_id: "86753", organizationId: "3117", price: "1000", qty: "1", ...
分类:编程语言   时间:2015-10-22 01:33:34    阅读次数:304
RAC手动中断订阅
__block RACDisposable* dispose = [[RACObserve(self, price) skip:1]subscribeNext:^(NSNumber* x) { [dispose dispose]; }];
分类:其他好文   时间:2015-10-21 22:48:03    阅读次数:196
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