大约有 9,000 项符合查询结果(耗时:0.0258秒) [XML]

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从网购到火车票,对比淘宝12306网为何如此烂? - 大数据 & AI - 清泛网 - ...

...一下12306的购票系统,为避免“黄牛”买票,购票系统有一个业务逻辑:一个有效身份证件同一乘车日期同一车次限购一张车票。因此购买一张车票可以简化为包含四个操作: 1) 判断同一乘车日期同一车次是否有未预订的空余...
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浅析为什么char类型的范围是 -128~+127 - C/C++ - 清泛网 - 专注C/C++及内核技术

...起来也很简单容易, 以至于不用去思考为什么,不是有一个整型范围的公式吗: -2^(n-1)~2^(n-1)-1 n为整型的内存占用位数,所以int类型32位 那么就是 -(2^31)~2^31 -1 即 -2147483648~2147483647,但是为什么最小负数绝对值总比最大正数...
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Open file in a relative location in Python

Suppose python code is executed in not known by prior windows directory say 'main' , and wherever code is installed when it runs it needs to access to directory 'main/2091/data.txt' . ...
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How do I get the path and name of the file that is currently executing?

... p1.py: execfile("p2.py") p2.py: import inspect, os print (inspect.getfile(inspect.currentframe()) # script filename (usually with path) print (os.path.dirname(os.path.abspath(inspect.getfile(inspect.currentframe())))) # script directory ...
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Quora如何在快速开发中保持高品质代码 - 项目管理 - 清泛网 - 专注C/C++及内核技术

...责后续维护就更好了,这样便能长期受益。 我们实现了一个简单的系统,在模块/目录等级的代码“ownership”上添加标签,例如: __reviewer__ = 'vanessa, kornel' 如果提交新变更,系统就自动会分析文件(或其上层目录),将新审...
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Linux 进程卡住了怎么办? - 操作系统(内核) - 清泛网 - 专注C/C++及内核技术

...,这也是无法用 kill 杀掉它的原因。 在 Stack Overflow 有一个解答: kill -9 只是给进程发送了一个 SIGKILL 信号,当一个进程处于特殊状态时(信号处理,或者系统调用中)会无法处理任何信号,包括 SIGKILL 也不能被正确处理,...
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os.walk without digging into directories below

How do I limit os.walk to only return files in the directory I provide it? 20 Answers ...
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`from … import` vs `import .` [duplicate]

...urself when you import for simplicity or to avoid masking built ins: from os import open as open_ # lets you use os.open without destroying the # built in open() which returns file handles. share | ...
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How to check if a file exists in Go?

... function solely intended to check if a file exists or not (like Python's os.path.exists ). What is the idiomatic way to do it? ...
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一个孩子的5.28日记 - 轻松一刻 - 清泛网 - 专注C/C++及内核技术

一个孩子的5.28日记上午10:30,爸爸说,儿童节出国旅行计划没了;下午1:30,爸爸说,儿童节礼物也没了;下午3:30,妈妈说,爸爸没了…珍爱生命,不许跳楼!!!!上午10:30,爸爸说,儿童节出国旅行计划没了; 下午1:30,爸...