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How to debug a Flask app
...For PowerShell, use $env:
$env:FLASK_ENV = "development"
Prior to Flask 1.0, this was controlled by the FLASK_DEBUG=1 environment variable instead.
If you're using the app.run() method instead of the flask run command, pass debug=True to enable debug mode.
Tracebacks are also printed to the ter...
App Inventor 2 SemiCircleArc 扩展：高级自定义半圆进度条 · App Inventor 2 中文网
...rclearc
大小
16.20 KB
版本
1.0
最低 API 等级
7
更新日期
2026-01-17
构建工具
FAST v2.8.4
使用的库
SemiCircleArcProgressBar（作者：hadibtf）
...
Java: Difference between PrintStream and PrintWriter
...er whatever happened to the PrintStream class and to System.out. In Java
1.0, the PrintStream class simply truncated all Unicode characters to ASCII characters by dropping
the top byte. (At the time, Unicode was still a 16-bit encoding.) Clearly, that was not a clean or
portable approach, and ...
How can I check if my python object is a number? [duplicate]
... == 1, "foo" * False == "", sum([True, False, True]) == 2, "%f" % True == "1.0", and so on.
– user395760
Nov 24 '15 at 22:12
7
...
How to use performSelector:withObject:afterDelay: with primitive types in Cocoa?
...ctor:@selector(setUserAlphaNumber:) withObject: [NSNumber numberWithFloat: 1.0f]
afterDelay:1.5];
-(void) setUserAlphaNumber: (NSNumber*) number{
[txtUsername setAlpha: [number floatValue] ];
}
Same way you can use [NSNumber numberWithInt:] etc.... and in the receiving method yo...
How To Save Canvas As An Image With canvas.toDataURL()?
...ySelector('#my-canvas');
var dataURL = canvas.toDataURL("image/jpeg", 1.0);
downloadImage(dataURL, 'my-canvas.jpeg');
});
// Save | Download image
function downloadImage(data, filename = 'untitled.jpeg') {
var a = document.createElement('a');
a.href = data;
a.download = filena...
Draw multi-line text to Canvas
...StaticLayout(mText, mTextPaint, canvas.getWidth(), Alignment.ALIGN_NORMAL, 1.0f, 0.0f, false);
canvas.save();
// calculate x and y position where your text will be placed
textX = ...
textY = ...
canvas.translate(textX, textY);
mTextLayout.draw(canvas);
canvas.restore();
...
Google Chrome Extensions - Can't load local images with CSS
...me": "My Extension Name",
"description": "My Description",
"version": "1.0",
"content_scripts": [
{
"matches": ["https://mydomain.com/*"],
"css": ["style.css"]
}
],
"permissions": [
"https://mydomain.com/"
],
"browser_action": {
"default_icon":...
Get spinner selected items text?
...er.add("dummy item");
}
}
main_spinner.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
...
LEGO EV3 机器人按键控制 · App Inventor 2 中文网
...称：cavedu_ev3
屏幕尺寸：Fixed（固定尺寸）
版本信息：1.0 (version code 1)
2. 连接步骤
打开应用，点击”Connect”按钮
在弹出的设备列表中选择EV3机器人
等待蓝牙连接建立
连接成功后按键变为可用状态
...