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// 直接崩溃
int *volatile nptr = 0;
int c = *nptr;
printf("%d", c); 

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NSDictionary *dict = @{@"modelId":11};
 
NSString *url = @"http://xxx/api/file/upload";
 
[manager POST:url parameters:dict constructingBodyWithBlock:^(id<AFMultipartFormData>  _Nonnull formData) {
    [formData appendPartWithFileData:imageData name:@"modelObjUrl" fileName:@"mesh.obj" mimeType:@"application/octet-stream"];
    [formData appendPartWithFileData:imageData name:@"modelMtlUrl" fileName:@"mesh.obj.mtl" mimeType:@"application/octet-stream"];
    [formData appendPartWithFileData:imageData name:@"modelImageUrl" fileName:@"mesh.png" mimeType:@"application/octet-stream"];
    [formData appendPartWithFileData:imageData name:@"modelCropImageUrl" fileName:@"crop.png" mimeType:@"application/octet-stream"];
} progress:^(NSProgress * _Nonnull uploadProgress) {

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+ (instancetype)shareInstance
{
    static id instance = nil;
    static dispatch_once_t onceToken;
    dispatch_once(&onceToken, ^{
        instance = [[self alloc] init];
    });
    
    return instance;
}

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from tensorflow.examples.tutorials.mnist import input_data

mnist = input_data.read_data_sets("MNIST_data",one_hot=True)

print(mnist.train.images.shape,mnist.train.labels.shape)
print(mnist.test.images.shape,mnist.test.labels.shape)
print(mnist.validation.images.shape,mnist.validation.labels.shape)

import tensorflow as tf
sess = tf.InteractiveSession()

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Advanced Animations with UIKit
video: https://devstreaming-cdn.apple.com/videos/wwdc/2017/230lc4n1loob9/230/230_hd_advanced_animations_with_uikit.mp4?dl=1
pdf: https://devstreaming-cdn.apple.com/videos/wwdc/2017/230lc4n1loob9/230/230_advanced_animations_with_uikit.pdf

Advanced Touch Bar
video: https://devstreaming-cdn.apple.com/videos/wwdc/2017/222ijxk2akkrebmr/222/222_hd_advanced_touch_bar.mp4?dl=1
pdf: https://devstreaming-cdn.apple.com/videos/wwdc/2017/222ijxk2akkrebmr/222/222_advanced_touch_bar.pdf

Advances in TVMLKit
video: https://devstreaming-cdn.apple.com/videos/wwdc/2017/202ximbb9e2dq222/202/202_hd_advances_in_tvmlkit.mp4?dl=1

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//
//  YYDuckObj.h
//  YYDuckObj
//
//  Created by yauzz on 17/8/13.
//  Copyright © 2017年 yauzz. All rights reserved.
//

#import <Foundation/Foundation.h>

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OVERVIEW: LLVM 'Clang' Compiler: http://clang.llvm.org

USAGE: clang -cc1 [options] <inputs>

OPTIONS:
  -###                    Print the commands to run for this compilation
  --analyze               Run the static analyzer
  --migrate               Run the migrator
  --relocatable-pch       Build a relocatable precompiled header
  --serialize-diagnostics <value>

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- (void)displayAsyncLayer:(_ASDisplayLayer *)asyncLayer asynchronously:(BOOL)asynchronously
{
  ASDisplayNodeAssertMainThread();

  ASDN::MutexLocker l(__instanceLock__);

  if (_hierarchyState & ASHierarchyStateRasterized) {
    return;
  }

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// 注册Runloop观察者，from YYKit

static void YYRunLoopObserverCallBack(CFRunLoopObserverRef observer, CFRunLoopActivity activity, void *info) {
    if (transactionSet.count == 0) return;
    NSSet *currentSet = transactionSet;
    transactionSet = [NSMutableSet new];
    [currentSet enumerateObjectsUsingBlock:^(YYTransaction *transaction, BOOL *stop) {
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Warc-performSelector-leaks"
        [transaction.target performSelector:transaction.selector];

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/**
 A proxy used to hold a weak object.
 It can be used to avoid retain cycles, such as the target in NSTimer or CADisplayLink.
 
 sample code:
 
     @implementation MyView {
        NSTimer *_timer;
     }