小编cyn*_*joy的帖子

可能重复:
Python中的三元条件运算符

var foo = (test) ? "True" : "False";

这在Python中会是什么样子？

使用Python 2.7,如果这有所作为.

我如何保持这个范围？

原版的

var Base = new function() {

    var canvas;
    var context;

    this.init = function()
    {
        console.log("Canvas: " + $("canvas")[0])

        this.canvas = $("canvas")[0];
        console.log("Context: " + this.canvas.getContext('2d'))
        this.context = this.canvas.getContext('2d');

        $(window).resize(handleWindowResize);

        handleWindowResize();
    };

    function handleWindowResize()
    {
        console.log("Resize Canvas [" + this.canvas + "] to {width: " +
            $(window).width() + "," + $(window).width() + "}");
        this.canvas.width = $(window).width();
        this.canvas.height = $(window).height(); 
    }
}

$(window).load(function() { new Base.init() });

输出继电器:

Canvas: [object HTMLCanvasElement]
Context: [object CanvasRenderingContext2D]
Resize Canvas [undefined] to {width: 1680,1680} …

我想我只是捕获起始UIAcceleration y值并将其与当前值进行比较然后"测量"但我并不确切地知道(1)这是正确的(2)数学应该是什么.

谢谢你的帮助.

更新:

这是我按照jrturton的建议使用的代码.

#import "ViewController.h"

@interface ViewController()
{
  CMMotionManager *motionManager;
}
@end

@implementation ViewController
@synthesize angleLabel;

- (void)startMotion
{
  if (motionManager == nil)
  {
    motionManager = [[CMMotionManager alloc] init];
  }
  motionManager = [[CMMotionManager alloc] init];
  [motionManager startDeviceMotionUpdatesToQueue:[NSOperationQueue currentQueue] withHandler:^(CMDeviceMotion *motion, NSError *error) {
    angleLabel.text = [NSString stringWithFormat:@"%g", motion.attitude.pitch];
  }];
}

- (void) stopMotion
{
  if (motionManager)
  {
    [motionManager stopDeviceMotionUpdates];
  }

  motionManager = nil;
}

- (void)viewDidUnload {
    [self setAngleLabel:nil];
    [super viewDidUnload];
}
@end

如何避免将重复的条目添加到生成器中,或者在已经存在的情况下将其删除？

如果我应该使用别的东西,请建议.

我试图通过他们的contactId查找联系人的电话号码,bll结果返回 - 电话号码:1

我尝试过围绕SO使用其他示例,但我一直在光标上得到0计数

Uri uri = ContentUris.withAppendedId(Data.CONTENT_URI, contactId);

Log.i(TAG, "Locate Contact by Id: " + contactId + " at Uri: " + uri.toString());

Cursor cursor = this.getContentResolver().query(uri, null, null, null, null);

try {
    if (cursor.moveToFirst()) {
        Log.i(TAG, "Phone Number: " + cursor.getString(cursor.getColumnIndex(Phone.NUMBER)));
    }
} finally {
    cursor.close();
}