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linux ls、ll命令详解 - 更多技术 - 清泛网 - 专注C/C++及内核技术

...读取权限, w : 表示修改权限, x : 表示执行权限 1)如何修改文件权限? u : 当前用户的权限, g : 当前用户组的权限, o : 当前其他用户权限 示例:a)给当前用户添加执行权限 chmod u+x text.txt b)给当前用户组添加写权...
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移动游戏项目弱网测试策略 - 更多技术 - 清泛网 - 专注C/C++及内核技术

...的考验,也对我们移动项目的测试人员提出了新的问题,如何测试这种情况?总能拿着手机去高铁上测试吧。 方法还是有的,网上的工具也挺多,今天就给小伙伴们分享一下基于fiddler这款工具的弱网测试方法。目前这款工...
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App Inventor 2开发计步器与定位器 - App Inventor 2 中文网 - 清泛IT论坛,有思想、有深度

...编写“健身宝”手机应用程序   3.问题:   (1)如何获取走路步数、距离?   (2)如何计算走路时间?   (3)如何获得当前位置?   (4)如何存储信息?   4.规划:   (1)利用pedometer(计步器)组件...
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MQTT物联网协议完全实践指南 · App Inventor 2 中文网

...概念到高级应用的各个方面。通过实际项目案例,展示了如何使用App Inventor构建可靠的物联网应用,包括: 完整的MQTT连接管理:自动重连、错误处理、状态监控 智能数据处理:实时数据分析、自动控制、告警系统 高级功...
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Java ArrayList - how can I tell if two lists are equal, order not mattering?

...h. You can copy and tweak this code to your heart's content if need be. NB I was at first disappointed that none of the CollectionUtils methods provides an overloaded version enabling you to impose your own Comparator (so you can redefine equals to suit your purposes). But from collections4 4.0 ...
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致PHP路上的“年轻人” - PHP - 清泛IT社区,为创新赋能!

...段落的“过来人”,还是想写点东西给“年轻人”。关于如何成长?我直白的答案还是建议通过实践,通过项目来成长。虽然提倡多参加项目,但项目能是乱七八糟的项目什么都去尝试做,对于刚工作的同学,希望做这两类项...
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致PHP路上的“年轻人” - 杂谈 - 清泛网 - 专注C/C++及内核技术

...落的“过来人”,还是想写点东西给“年轻人”。 关于如何成长? 我直白的答案还是建议通过实践,通过项目来成长。虽然提倡多参加项目,但项目能是乱七八糟的项目什么都去尝试做,对于刚工作的同学,希望做这两类...
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Entity framework linq query Include() multiple children entities

...Select expressions to the appropriate depth: using System.Data.Entity; // NB! var company = context.Companies .Include(co => co.Employees.Select(emp => emp.Employee_Car)) .Include(co => co.Employees.Select(emp => emp.Employee_Country)) ...
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NumPy: function for simultaneous max() and min()

...ed in c or fortran (or any other low-level language) and should be almost unbeatable in terms of performance. I'm using numba to illustrate the principle and get a very fast, dtype-independant implementation: import numba as nb import numpy as np @nb.njit def minmax(array): # Ravel the array a...
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Smooth GPS data

...rivate float variance; // P matrix. Negative means object uninitialised. NB: units irrelevant, as long as same units used throughout public KalmanLatLong(float Q_metres_per_second) { this.Q_metres_per_second = Q_metres_per_second; variance = -1; } public long get_TimeStamp() { return Tim...