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新手程序员应该知道的7件事 - 创意 - 清泛网 - 专注C/C++及内核技术

...迎阅读这7条专为新手程序员总结的建议。 1、了解底层系统 软件开发的一个重要组成部分是,了解编程语言。但是,正如有些人建议的那样,开发人员还需要了解堆栈下面是怎么回事。 “很多语言抽象化了系统层正在发生...
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UCenter实现各系统通信的原理 - 更多技术 - 清泛网 - 专注C/C++及内核技术

UCenter实现各系统通信的原理===本文导读===UCenter实现各系统通信的原理如何实现phpcms和discuz的Cookie同步===全文阅读===整合phpcms v9和discuz X3.2实现同步登陆、退出免激活===本文导读=== 整合phpcms v9和discuz X3.2实现同步登陆、退出免激...
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Spring Boot - inject map from application.yml

...eholders being replaced. E.g. if you had a system property project.version=123 set, the example you gave in the answer would return version=123, while after setting locations it would return project.version=${project.version}. Do you know if there's a limitation of some sorts here? ...
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Awk学习笔记 - 更多技术 - 清泛网 - 专注C/C++及内核技术

...语法有两种形式 2.2. 命令选项 3. 模式和操作 3.1. 模式 3.2. 操作 4. awk的环境变量 5. awk运算符 6. 记录和域 6.1. 记录 6.2. 域 6.3. 域分隔符 ...
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Differences between unique_ptr and shared_ptr [duplicate]

...ou pass it by value if you cannot copy it? – splinter123 Jun 3 '16 at 22:00 11 @splinter123: By m...
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LINGO使用指南 - 更多技术 - 清泛网 - 专注C/C++及内核技术

...时,LINGO都会提示为参数inflation_rate输入一个值。在WINDOWS操作系统下,将会接收到一个类似下面的对话框: 直接输入一个值再点击OK按钮,LINGO就会把输入的值指定给inflation_rate,然后继续求解模型。 除了参数之外,也可以...
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What __init__ and self do on Python?

...iable declared inside an __init__ function: class MyClass(object): i = 123 def __init__(self): self.i = 345 a = MyClass() print(a.i) print(MyClass.i) Output: 345 123 share | ...
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VM 磁盘空间扩容引起的一些问题 - 更多技术 - 清泛网 - 专注C/C++及内核技术

...拟机迁移到其他的LUN空间上 然后在存储上做扩容和收缩操作 完成操作之后 问题来了 ESX1 ESX2可以在设备中可以认到LUN 60 LUN80 容量显示正确,但不能正确识别文件格式。在ESX1的数据储存中认到LUN60 LUN80的准确容量...
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Pandas - Get first row value of a given column

...ime'] = x does not work: In contrast, assignment with df.iloc[0]['bar'] = 123 does not work because df.iloc[0] is returning a copy: In [66]: df.iloc[0]['bar'] = 123 /home/unutbu/data/binky/bin/ipython:1: SettingWithCopyWarning: A value is trying to be set on a copy of a slice from a DataFrame Se...
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Renaming a virtualenv folder without breaking it

... using and so don't encounter the problem. – CoderGuy123 Nov 4 '16 at 18:06 Scratch that! Today I ran into a problem: ...