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How to Solve the Error: "Maximum number of apps for free development reached

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【推荐】2019 Java 开发者跳槽指南.pdf(吐血整理) >>> Who is Affected By This? For those of you who are running your apps on a physical device and are using a free Apple account. What's the Problem? Apple has recently introduced a new headache for learner developers by limiting the number of apps you can side load on your physical device to 3 per week. The Solution The easiest solution is to simply delete the existing apps you've got on your iPhone/iPad. Alternatively you can create a new Apple ID and go through the laborious process of adding this account into Xcode. If the above solution didn't work for you,

导入SQL文件到MySQL报错

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【推荐】2019 Java 开发者跳槽指南.pdf(吐血整理) >>> 从dev环境导出了一个大小为57M的sql文件，使用Navicat导入到一半的时候，报出下面的错误： [Err] 2006 - MySQL server has gone away [Err] ... [Msg] Finished - Unsuccessfully -------------------------------------------------- 然后接着查看了MySQL的console信息： 2020-01-08T01:29:12.787613Z 9 [Note] Aborted connection 9 to db: 'testdbdev' user: 'hecg' host: 'localhost' (Got a packet bigger than 'max_allowed_packet' bytes) 意思是我们导入时候发给MySQL Server的数据包的大小超过了默认的大小，如果要解决这个问题，手动在 my.ini 文件中设置 max_allowed_packet 的大小即可： [mysqld] ...... # 解决 [Err] 2006 - MySQL server has gone away max_allowed_packet=128M 解决问题后

how to fill off global offset table?

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问题 Motivation: I want to test gcc's limition size of global offset table on my arch(x86). What I have done: use multiple undeclared functions in a shared library ( gcc -nostdlib -shared -o got.so ./got.c ) // got.c extern int itestvariable1; extern int testvariable2; void test(void) { fun1(); ... fun8(); } and readelf --relocs ./got.so : Relocation section '.rela.plt' at offset 0x3a8 contains 8 entries: Offset Info Type Sym. Value Sym. Name + Addend 000000004018 000100000007 R_X86_64_JUMP_SLO

9370问题网页

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【推荐】2019 Java 开发者跳槽指南.pdf(吐血整理) >>> 参考： https://ez.analog.com/wide-band-rf-transceivers/design-support-ad9371/f/q-a/79592/so-where-is-the-ad9370-quick-start-guide-pdf-which-mentioned-by-the-wiki-page we've just got one ADRV9371-W/PRBZ board and i'm now trying to run the demo in no-os mode,so i come to this wiki page: AD9371 No-OS Setup [Analog Devices Wiki] ; in the step " Transceiver Evaluation Software " i saw this: "By following the AD9370 Quick Start Guide.pdf , a C script can be created and generate the following files: headless.c, headless.h, myk.c, myk.h and myk_ad9528init.c." and i can

'闭包'和'lambda'有什么区别？

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【推荐】2019 Java 开发者跳槽指南.pdf(吐血整理) >>> 有人能解释一下吗我理解它们背后的基本概念，但我经常看到它们互换使用，我感到困惑。现在我们在这里，它们与常规功能有什么不同？ #1楼并非所有的闭包都是lambda，并非所有的lambd都是闭包。两者都是功能，但不一定是我们习惯了解的方式。 lambda本质上是一个内联定义的函数，而不是声明函数的标准方法。 Lambdas经常可以作为对象传递。闭包是一种通过引用其主体外部的字段来包围其周围状态的函数。封闭状态保持在闭包的调用之间。在面向对象的语言中，闭包通常通过对象提供。但是，某些OO语言（例如C＃）实现的特殊功能更接近于纯函数语言（如lisp）提供的闭包定义，这些闭包没有包含状态的对象。有趣的是，在C＃中引入Lambdas和Closures使函数式编程更接近主流使用。 #2楼当大多数人想到函数时，他们会想到命名函数： function foo() { return "This string is returned from the 'foo' function"; } 这些是按名称调用的，当然： foo(); //returns the string above 使用 lambda表达式，您可以拥有匿名函数： @foo = lambda() {return "This is

你的首个golang语言详细入门教程 | your first golang tutorial

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【推荐】2019 Java 开发者跳槽指南.pdf(吐血整理) >>> 本文首发于个人博客 https://kezunlin.me/post/a0fb7f06/ ，欢迎阅读最新内容！ your first golang tutorial  go tutorial versions: go: 1.13.1 install wget https://dl.google.com/go/go1.13.1.linux-amd64.tar.gz sudo tar -C /usr/local -xzf go1.13.1.linux-amd64.tar.gz ll /usr/local/go vim ~/.bashrc export PATH=$PATH:/usr/local/go/bin source ~/.bashrc zsh uses env profile ~/.zshrc , bash use env profile ~/.bashrc . check version go version go version go1.13.1 linux/amd64 uninstall just delete /usr/local/go set GOPATH Create your workspace directory, $HOME/go . The GOPATH

Why is my array of Promises running before calling Promise.all()?

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问题 I am trying to create an array of Promises, then resolve them with Promise.all(). I am using got, which returns a promise. My code works, but I don't fully understand how. Here it is: const got = require('got'); const url = 'myUrl'; const params = ['param1', 'param2', 'param3']; let promiseArray = []; for (param of params) { promiseArray.push(got(url + param)); } // Inspect the promises for (promise of promiseArray) { console.log(JSON.stringify(promise)); // Output: promise: {"_pending":true,

DateTimeFormatter与SimpleDateFormat

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日期格式化类：DateTimeFormatter与SimpleDateFormat 一、SimpleDateFormat类 SimpleDateFormat是用于以对语言环境敏感的方式格式化和解析日期的具体类。 SimpleDateFormat类的构造方法 NO 构造器描述 1 SimpleDateFormat() SimpleDateFormat使用默认FORMAT语言环境的默认模式和日期格式符号构造一个。 2 SimpleDateFormat(Stringpattern) SimpleDateFormat使用给定的模式和默认FORMAT语言环境的默认日期格式符号构造一个。 3 SimpleDateFormat(Stringpattern,DateFormatSymbolsformatSymbols) SimpleDateFormat使用给定的模式和日期格式符号构造一个。 4 SimpleDateFormat(Stringpattern,Localelocale) SimpleDateFormat使用给定语言环境和给定语言环境的默认日期格式符号构造一个。 SimpleDateFormat为什么不是线程安全的？ SimpleDateFormat类的方法没有使用synchronized来给共享变量加锁。 SimpleDateFormat继承于DateFormat

DateTimeFormatter与SimpleDateFormat

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DateTimeFormatter与SimpleDateFormat

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