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App Inventor 2 拓展参考文档 · App Inventor 2 中文网
...图像】TaifunImage 拓展：图片压缩剪裁处理
【图像】SimpleBase64 拓展：图像Base64编解码传输
【图像】KIO4_Base64 拓展：更强大的图像Base64编解码工具，解码后的图像可写入到文件
【连接】MqttClient 拓展：轻量级物联网传输协议
...
【持续更新】App Inventor 2 中文拓展一览 - App Inventor 2 中文网 - 清泛...
...图像】TaifunImage 拓展：图片压缩剪裁处理
【图像】SimpleBase64 拓展：图像Base64编解码传输
【图像】KIO4_Base64 拓展：更强大的图像Base64编解码工具，解码后的图像可写入到文件
【图像】ImageUtil 拓展：图像组件的附加工具，提供...
Sanitizing strings to make them URL and filename safe?
...e provides:
canonicalize (string $input, [bool $strict = true])
decodeFromBase64 (string $input)
decodeFromURL (string $input)
encodeForBase64 (string $input, [bool $wrap = false])
encodeForCSS (string $input)
encodeForHTML (string $input)
encodeForHTMLAttribute (string $input)
encodeForJavaScript ...
PostgreSQL error: Fatal: role “username” does not exist
...
Use the operating system user postgres to create your database - as long as you haven't set up a database role with the necessary privileges that corresponds to your operating system user of the same name (h9uest in your case):
sudo -u postgres -i
As recommended here or here.
Th...
Width equal to content [duplicate]
...s link for different techniques: http://css-tricks.com/all-about-floats/)
Demo: http://jsfiddle.net/CvJ3W/5/
Edit
If you go for the solution with display:inline-block but want to keep each item in one line, you can just add a <br> tag after each one:
<div id="container">
<p>...
What is the use of the JavaScript 'bind' method?
... simply a matter of ross.getMonthlyFee(25). Was this example just to just demonstrate the use of bind(), or is there some advantage to your approach?
– Darryl
Jan 14 '15 at 16:59
...
sqlalchemy IS NOT NULL select
... for help, clarification, or responding to other answers.Making statements based on opinion; back them up with references or personal experience.To learn more, see our tips on writing great answers.
Draft saved
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...
ASP.NET MS11-100: how can I change the limit on the maximum number of posted form values?
...
public HttpCookie Get(string name)
{
HttpCookie cookie = (HttpCookie) base.BaseGet(name);
if ((cookie == null) && (this._response != null))
{
cookie = new HttpCookie(name);
this.AddCookie(cookie, true);
this._response.OnCookieAdd(cookie);
}
return...
How to get the raw value an field?
...
Track all pressed keys based on their key codes
I suppose one could listen to the keyup events and keep an array of all characters entered, based on their keycodes. But it's a pretty tedious task and probably prone to bugs.
http://unixpapa.com/js...
How to read a file into a variable in shell?
...lem for the:
value="$(cat config.txt)"
type solutions, but not for read based solutions.
Command expansion removes trailing newlines:
S="$(printf "a\n")"
printf "$S" | od -tx1
Outputs:
0000000 61
0000001
This breaks the naive method of reading from files:
FILE="$(mktemp)"
printf "a\n\n" &...