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App Inventor 2 LEGO 乐高专题 · App Inventor 2 中文网

... 中文教育版 各版本对比 App上架指南 入门必读 IoT专题 AI2拓展 Aia Store 关于 关于我们 发布日志 服务条款 搜索 ...
https://www.tsingfun.com/ilife/life/714.html 

程序员:编程能力与编程年龄的关系 - 杂谈 - 清泛网 - 专注C/C++及内核技术

...并不是编程编到30岁就玩完了,而是编程编到30岁才刚刚入门。这些不合格的程序,整天BS这个不好,那个不好的,而且喜欢速成,好大喜功。 我是一个奔四的人了,编程就像登山一样,越往上爬人越少,所以,在我这个年纪还...
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App Inventor 2 经典蓝牙(SPP) 硬件接入:hc05 · App Inventor 2 中文网

...们 发布日志 服务条款 教育 入门必读 中文教程 IoT专题 AI2拓展 ChatGPT接入 Aia Store 开通VIP 搜索 ...
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MySQL Conditional Insert

...nsert, try: INSERT INTO x_table(instance, user, item) SELECT 919191, 123, 456 FROM dual WHERE NOT EXISTS (SELECT * FROM x_table WHERE user = 123 AND item = 456) In this, dual is a table with one row only (found orig...
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上班狗来算算 你离财务自由还差多少钱? - 杂谈 - 清泛网 - 专注C/C++及内核技术

...本金是多少。然后咱们现以年化10%的收益为前提来算~ A)入门级财务自由 按照城市居民的正常消费水平来算,仅满足衣食住行的开支,一年需要大约5万花销,即每月至少4000元。如果你的生活目标就是这么小而美,那么你只需要...
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比起创业孵化器 双创中国更急需的是创业教育 - 资讯 - 清泛网 - 专注C/C++...

...都是很好的创业教育培训平台。但因其定位精英人群,高入门门槛使其具有封闭性,又让本应平民化的创业培训教育距离普通创业者十分的遥远。 中国特色创业文化构建的新生机会 互联网精神的本质是开放共享,而非封闭自...
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CSS: bolding some text without changing its container's size

...important; text-shadow: none!important; } <li class="shadow0">MmmIii123 This line tests shadow0 (plain)</li> <li class="shadow2">MmmIii123 This line tests shadow2 (0.02ex)</li> <li class="shadow4">MmmIii123 This line tests shadow4 (0.04ex)</li> <li class="s...
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How to find elements with 'value=x'?

I need to remove element that have value="123" . I know that all elements with different values are located into #attached_docs , but I don't know how to select element with value="123" . ...
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How to print pandas DataFrame without index

... len(df) df.index=blankIndex If we use the data from your post: row1 = (123, '2014-07-08 00:09:00', 1411) row2 = (123, '2014-07-08 00:49:00', 1041) row3 = (123, '2014-07-08 00:09:00', 1411) data = [row1, row2, row3] #set up dataframe df = pd.DataFrame(data, columns=('User ID', 'Enter Time', 'Acti...
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Difference between == and ===

... me at least)) With strings we will have to get used to this: var st = "123" // "123" var ns = (st as NSString) // "123" st == ns // true, content equality st === ns // ...