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How to test if a string is JSON or not?
...SON, it's valid to do so. But they are not structured data. JSON is mainly invented as an interchange format » which is used for structured data » which can be an object or array.
– Onur Yıldırım
Apr 22 '19 at 23:29
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Sleep in JavaScript - delay between actions
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I missed this answer while looking for a solution and re-invented the bicycle :D If only I'd see it before it would save me hours!! Upvoted!
– sserzant
Jan 23 at 12:12
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Origin is not allowed by Access-Control-Allow-Origin
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If this was a good solution, CORS would not have been invented in the first place. Applying this header to any host disable the CORS protection and exposes you to malicious scripts, not just yours. Don't be surprised if your bank account is suddenly empty.
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代码块超过1.2w编译apk报错问题 - App Inventor 2 中文网 - 清泛IT社区，为创新赋能！
报错信息：
3月 04, 2025 9:50:11 上午 com.google.appengine.tools.development.ApiProxyLocalImpl log
严重: javax.servlet.ServletContext log: Exception while dispatching incoming RPC call
com.google.gwt.user.server.rpc.UnexpectedException: Service method 'public abstract long com.google.appinv...
CSS scrollbar style cross browser [duplicate]
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Scrollbar CSS styles are an oddity invented by Microsoft developers. They are not part of the W3C standard for CSS and therefore most browsers just ignore them.
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VIP会员中心 · App Inventor 2 中文网，少儿编程陪伴者
... 首页 VIP会员中心 中文社区 关于 App Inventor 2 中文网 ...
jQuery: How can i create a simple overlay?
...gin. Other people have already written some nice ones in jquery, so why re-invent the wheel?
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Calculating a directory's size using Python?
Before I re-invent this particular wheel, has anybody got a nice routine for calculating the size of a directory using Python? It would be very nice if the routine would format the size nicely in Mb/Gb etc.
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【转】用App Inventor 2实现电子围栏功能 - App应用开发 - 清泛IT社区，为创新赋能！
在行空板《家庭安全相册》项目中，第四部分是手机APP监护人部分。这部分需要完成手机获取家庭成员传送回来的位置后，计算是否在安全的电子围栏范围内。因为电子围栏是相对复杂的部分，因此独立一章详细说明。
App In...
【App Inventor 2 数据可视化】使用柱状图和饼图收集数据 - App应用开发 - ...
...使人们更容易理解。帮助人们一眼就能看到他们在生活或社区中关心的问题发生了什么。你喜欢用哪些不同方式的图像和图形来理解数据?所有的数据都留在App中，直到你按下Reset按钮。在本系列中，你可以查看以下指南，了解如...