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RadioButton单选按钮扩展集合 · App Inventor 2 中文网
...载和安装
UrsAI2RadioButton扩展: UrsAI2RadioButton.aix
示例应用: RadioButtonExample.aia
功能概述
UrsAI2RadioButton扩展将CheckBox组件转换为RadioButton组件，提供真正的单选功能：
将CheckBox转换为RadioButton外观
...
ComponentGroup 组件组扩展：监控内容变化和批量启用禁用组件 · App Inventor 2 中文网
...mailPicker
邮箱选择器
下载
.aix拓展文件：
de.UllisRoboterSeite.UrsAI2ComponentGroup.aix
.aia示例文件：
UrsComponentGroupTest.aia
版本历史
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CSS to stop text wrapping under image
... to use a <p> element as a parent for your <span>.
<li id="CN2787">
<img class="fav_star" src="images/fav.png">
<p>
<span>Text, text and more text</span>
</p>
</li>
Since <p> is a block element, you can set its width using CSS...
How do I find out which keystore was used to sign an app?
...oid.youtube-10.39.54-107954130-minAPI15.apk
Signer #1:
Signature:
Owner: CN=Unknown, OU="Google, Inc", O="Google, Inc", L=Mountain View, ST=CA, C=US
Issuer: CN=Unknown, OU="Google, Inc", O="Google, Inc", L=Mountain View, ST=CA, C=US
Serial number: 4934987e
Valid from: Mon Dec 01 18:07:58 PST 2008 ...
Reorder levels of a factor without changing order of values
...
some more, just for the record
## reorder is a base function
df$letters <- reorder(df$letters, new.order=letters[4:1])
library(gdata)
df$letters <- reorder.factor(df$letters, letters[4:1])
You may also find useful Relevel and combine_factor.
...
Which equals operator (== vs ===) should be used in JavaScript comparisons?
...
var1 == var2
When using == for JavaScript equality testing, some
funky conversions take place.
Moral of the story:
Use === unless you fully understand the
conversions that take place with ==.
share
...
Received fatal alert: handshake_failure through SSLHandshakeException
... section for the same, that starts as:
adding as trusted cert:
Subject: CN=blah, O=blah, C=blah
Issuer: CN=biggerblah, O=biggerblah, C=biggerblah
Algorithm: RSA; Serial number: yadda
Valid from SomeDate until SomeDate
You'll need to look for if the server's CA is a subject.
The handshak...
List of All Locales and Their Short Codes?
...Y
ar-TN
ar-YE
as-IN
az-Cyrl-AZ
az-Latn-AZ
ba-RU
be-BY
bg-BG
bn-BD
bn-IN
bo-CN
br-FR
bs-Cyrl-BA
bs-Latn-BA
ca-ES
co-FR
cs-CZ
cy-GB
da-DK
de-AT
de-CH
de-DE
de-LI
de-LU
dsb-DE
dv-MV
el-GR
en-029
en-AU
en-BZ
en-CA
en-GB
en-IE
en-IN
en-JM
en-MY
en-NZ
en-PH
en-SG
en-TT
en-US
en-ZA
en-ZW
es-AR
es-BO
es-CL
...
Understanding colors on Android (six characters)
... 87%: DE 70%: B3 54%: 8A 30%: 4D 26%: 42 12%: 1F
– cn123h
May 9 '15 at 14:58
...
How do you calculate the average of a set of circular data? [closed]
...a[i]-x
c = subset of a where the correct (angular) difference (a[i]-360)-x
cn = size of c
d = subset of a where the correct (angular) difference (a[i]+360)-x
dn = size of d
y = sum((b[i]-x)^2) + sum(((c[i]-360)-b)^2) + sum(((d[i]+360)-c)^2)
= sum(b[i]^2 - 2*b[i]*x + x^2)
+ sum((c[i]-360)^2 - 2*(c...