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App Inventor 2 拓展参考文档 · App Inventor 2 中文网
...词云效果
【UI】BubbleTabBar 拓展：打造个性化酷炫的底部导航条
【UI】ActionBar 拓展 - 溢出菜单，…菜单
【UI】ScrollArrangementHandler 滚动布局管理器拓展：同一屏幕内页面切换效果
【UI】AlphaDialog 扩展：自定义对话框
【UI】Fl...
Using sed, how do you print the first 'N' characters of a line?
...ters you can remove the N+1 characters up to the end of line:
$ sed 's/.//5g' <<< "defn-test"
defn
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Displaying the Indian currency symbol on a website
...º'), url(data:font/truetype;charset=utf-8;base64,AAEAAAANAIAAAwBQRkZUTVen5G0AAADcAAAAHEdERUYAQAAEAAAA+AAAACBPUy8yRQixzQAAARgAAABgY21hcGmyCE0AAAF4AAABamdhc3D//wADAAAC5AAAAAhnbHlmmuFTtAAAAuwAABAoaGVhZPOmAG0AABMUAAAANmhoZWELSAQOAAATTAAAACRobXR4KSwAAAAAE3AAAABMbG9jYUCgSLQAABO8AAAAKG1heHAAFQP+AAAT5AAAAC...
include antiforgerytoken in ajax post ASP.NET MVC
... tokenValue));
}
that will return a string
__RequestVerificationToken:"P5g2D8vRyE3aBn7qQKfVVVAsQc853s-naENvpUAPZLipuw0pa_ffBf9cINzFgIRPwsf7Ykjt46ttJy5ox5r3mzpqvmgNYdnKc1125jphQV0NnM5nGFtcXXqoY3RpusTH_WcHPzH4S4l1PmB8Uu7ubZBftqFdxCLC5n-xT0fHcAY1"
so we can use it like this
$(function () {
$(...
Determine device (iPhone, iPod Touch) with iOS
...";
if ([platform isEqualToString:@"iPod5,1"]) return @"iPod Touch 5G";
if ([platform isEqualToString:@"iPod7,1"]) return @"iPod Touch 6G";
if ([platform isEqualToString:@"iPad1,1"]) return @"iPad";
if ([platform isEqualToString:@"iPad2,1"]) return @"iPad 2 (WiFi)"...
How can I check for “undefined” in JavaScript? [duplicate]
...ined the code will throw an error, and it's easy to test - jsfiddle.net/WcM5g The proper way is typeof myVar === 'undefined'.
– laurent
Jul 11 '13 at 13:31
...
Random string generation with upper case letters and digits
...ndom.choice(chars) for _ in range(size))
...
>>> id_generator()
'G5G74W'
>>> id_generator(3, "6793YUIO")
'Y3U'
How does it work ?
We import string, a module that contains sequences of common ASCII characters, and random, a module that deals with random generation.
string.ascii_...
How to make div background color transparent in CSS
...({ width: 'hide' });
});
And my original inspiration:http://jsfiddle.net/5g1zwLe3/
I also used paint.net for creating the transparent PNG's, or rather the PNG's with transparent BG's.
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用户界面（UI）组件 · App Inventor 2 中文网
...求权限，除非访问该权限对你的应用是预先需要的，例如导航应用需要定位服务。
隐藏键盘()
隐藏软键盘。
按钮（Button）
按钮具有检测点击的功能，它的外观可以被改变，比如是否可点击 (启用)，可以在“界面设计...
NodeJS: Saving a base64-encoded image to disk
...Op3Vmfa5+49uoSSRyjfvc0A1kLx4KC6sNSeDieD1AWhrJLe0y+uy7b9GjP83l+m68AJ72AwSRPN5g7uwUAAAAAElFTkSuQmCC
saved this string to base64 which I read from in my code.
var fs = require('fs'),
data = fs.readFileSync('base64', 'utf8'),
base64Data,
binaryData;
base64Data = data.replace(/^data:im...