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Understanding ibeacon distancing

Trying to grasp a basic concept of how distancing with ibeacon (beacon/ Bluetooth-lowenergy/BLE) can work. Is there any true documentation on how far exactly an ibeacon can measure. Lets say I am 300 feet away...is it possible for an ibeacon to detect this? ...
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When to use UICollectionView instead of UITableView?

I found that UICollectionView is like an upgraded version of UITableView introduced in iOS6, but when should I choose UICollectionView instead of UITableView ? ...
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What is wrong with using goto? [duplicate]

...e negative texts about them some years ago): What is actually wrong with it? Why are goto's even possible in C++ then? ...
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How do I pause my shell script for a second before continuing?

I have only found how to wait for user input. However, I only want to pause so that my while true doesn't crash my computer. ...
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Can anyone explain what JSONP is, in layman terms? [duplicate]

I know JSONP is JSON with padding. 4 Answers 4 ...
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Why can't decimal numbers be represented exactly in binary?

...le, the decimal number 0.1 doesn't have an exact binary representation, so it's dangerous to use the == operator to compare it to another floating-point number. I understand the principles behind floating-point representation. ...
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How to get an IFrame to be responsive in iOS Safari?

... problem is that when you have to use IFrames to insert content into a website, then in the modern web-world it is expected that the IFrame would be responsive as well. In theory it's simple, simply aider use <iframe width="100%"></iframe> or set the CSS width to iframe { width: 100%;...
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Eclipse - “Workspace in use or cannot be created, chose a different one.” [duplicate]

I'm trying to create a workspace in the /Users/Shared/ directory with the thought that I can share that workspace between users. The problem is that after I create the workspace and change the permission on it, I encounter the error below (image) without even switching to a different user. ...
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How to use Servlets and Ajax?

...he keyword is "ajax": Asynchronous JavaScript and XML. However, last years it's more than often Asynchronous JavaScript and JSON. Basically, you let JS execute an asynchronous HTTP request and update the HTML DOM tree based on the response data. Since it's pretty a tedious work to make it to work a...
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How do you specify that a class property is an integer?

I'm experimenting with TypeScript, and in the process of creating a class with an "ID" field that should be an integer, I have gotten a little confused. ...