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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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BLE（二）信道&数据包&协议栈格式 - 创客硬件开发 - 清泛IT社区，...
文章源自：https://www.gandalf.site/2018/11/ble_23.html
参考低功耗蓝牙（BLE）安全初探
0x1 信道BLE的物理通道即“频道，分别是‘f=2402+k*2 MHz, k=0, … ,39’，带宽为2MHz”的40个RF Channel。
其中，有3个信道是advertising channel（广播通道）...
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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技术和资本玩转创客圈 英特尔在中国的动作才刚刚开始 - 资讯 - 清泛网 - 专...
...用到了两处，一是与本地的政府、大学、科研机构、创客社区等合作建设了12家联合众创空间；二是线上创新中心，由“创客大爆炸”在线众创空间为主导(英特尔作为联合创建方)，整合硬享公社(英特尔的线上创客社区)、线上开...
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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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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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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Difference between id and name attributes in HTML
...ny documents already out here without unique name= names, so the W3 people invented the id tag that was required to be unique. Unfortunately older browsers did not understand it. So you need both naming schemes in your forms.
NOTE: attribute "name" for some tags like <a> is not supported in H...
What is the C# equivalent of friend? [duplicate]
...C#, what can we do? The only decent solution that has occurred to me is to invent an interface, IWidget, which only exposes the public methods, and have the Factory return IWidget interfaces.
This involves a fair amount of tedium - exposing all the naturally public properties again in the interface...