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Understanding ibeacon distancing
...lculateAccuracy(int txPower, double rssi) {
if (rssi == 0) {
return -1.0; // if we cannot determine accuracy, return -1.
}
double ratio = rssi*1.0/txPower;
if (ratio < 1.0) {
return Math.pow(ratio,10);
}
else {
double accuracy = (0.89976)*Math.pow(ratio,7.7095) + 0.111; ...
Float vs Decimal in ActiveRecord
... why there is a Decimal format. If you do this:
irb:001:0> "%.47f" % (1.0/10)
=> "0.10000000000000000555111512312578270211815834045" # not "0.1"!
whereas if you just do
irb:002:0> (1.0/10).to_s
=> "0.1" # the interprer rounds the number for you
So if you are dealing with small fra...
Notepad++ htmltidy - unable to find libtidy.dll
...
@chobo2 - Download and install the latest notepad++ (v6.1.1 as at today) from notepad-plus-plus.org/download ... then from npp.5.9.bin.zip (linked to in Rory's comment above) copy the contents of the ansi\plugins\Config\tidy\ folder into:(notepad++ install dir)\plugins\Config\tid...
【HarmonyOS】编译、测试全流程 - HarmonyOS NEXT - 清泛IT社区，为创新赋能！
...nyOS Ability Package）包都必须经过签名才能安装到真机。
1.1 签名类型
签名类型能否安装能否上架应用市场设备限制证书来源适用场景未签名不能不行--无模拟器调试可用Debug签名仅注册设备不行需提前注册设备UDIDSDK自带调试...
Twitter bootstrap dropdown goes outside the screen
...o ul.dropdown-menu should do it
Deprecation Notice: As of Bootstrap v3.1.0, .pull-right on dropdown menus is deprecated. To right-align a menu, use .dropdown-menu-right.
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Android: how to draw a border to a LinearLayout
...ch" project (for android-8), define res/layout/main.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent"
an...
How to center align the ActionBar title in Android?
...Bar().setCustomView(R.layout.abs_layout);
abs_layout:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
...
HTML list-style-type dash
...re {
content: "–"; /* en dash */
position: absolute;
margin-left: -1.1em;
}
demo fiddle
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Fast and Lean PDF Viewer for iPhone / iPad / iOS - tips and hints?
...neTransform currentCTM = CGContextGetCTM(context);
if (currentCTM.a == 1.0 && baseImage) {
//Calculate ideal scale
CGFloat scaleForWidth = baseImage.size.width/self.bounds.size.width;
CGFloat scaleForHeight = baseImage.size.height/self.bounds.size.height;
CGFloat imageSc...
Serving gzipped CSS and JavaScript from Amazon CloudFront via S3
...loudfront supports gzipping.
Cloudfront connects to your server via HTTP 1.0. By default some webservers, including nginx, dosn't serve gzipped content to HTTP 1.0 connections, but you can tell it to do by adding:
gzip_http_version 1.0
to your nginx config. The equivalent config could be set fo...