parachvte

1、编写一个程序判断当前系统的字节顺序。
2、请编写一个程序输出以下变量的字节表示(由低位到高位)，需要给出16进制表示的输出结果。
float a = 2.3;
long b = 1;
double c = 1.0;
struct st{
  int num;
  char name[2];
} s;
3、请结合本课程介绍内容阐述SYN flooding攻击的原理，并提出抵御的方法？

parachvte

请比较select模型与WSAEventSelect模型两者之间的差异？

Deadline: Oct 27, 2014

parachvte

1. When activity starts, remove auto focus/keyboard popup, in AndroidManifest.xml

<activty android:windowSoftInputMode="stateHidden">
</activity>

2. When keyboard popup, make the window auto resize

parachvte

package com.ryannnnnnn.test_swipe_refresh_layout;

import android.app.Activity;
import android.graphics.Color;
import android.os.Bundle;
import android.os.Handler;
import android.support.v4.widget.SwipeRefreshLayout;

public class MyActivity extends Activity implements SwipeRefreshLayout.OnRefreshListener {

parachvte

@interface SomeClass
typedef void (^AnimationBlock)(BOOL);
@end

// animationBlocks, where store all animation blocks
NSMutableArray *animationBlocks = [NSMutableArray new];
AnimationBlock (^getNextAnimation)() = ^{
    AnimationBlock block = animationBlocks.count ? [animationBlocks objectAtIndex:0] : Nil;
    if (block) {
        [animationBlocks removeObjectAtIndex:0];

parachvte

@implementation UIImage (ImageCrop)

+ (UIImage *)centerOvalCropImage:(UIImage *)image
{
    CGFloat width = image.size.width;
    CGFloat height = image.size.height;
    CGRect targetRect = CGRectMake(width / 4.0, height / 4.0, width / 2.0, height / 2.0);

    UIGraphicsBeginImageContextWithOptions(CGSizeMake(width, height), NO, 0);
    CGContextRef context = UIGraphicsGetCurrentContext();

parachvte

- (void)viewWillAppear:(BOOL)animated {
    [super viewWillAppear:animated];

    // Add observers for keyboard messages
    [[NSNotificationCenter defaultCenter] addObserver:self
                                             selector:@selector(keyboardWillShow:)
                                                 name:UIKeyboardWillShowNotification
                                               object:nil];
    [[NSNotificationCenter defaultCenter] addObserver:self
                                             selector:@selector(keyboardWillHide:)

parachvte

#import <UIKit/UIKit.h>

@interface RXWaveLoadingView : UIView

@property (nonatomic, assign) NSInteger numberOfWaves;
@property (nonatomic, assign) CGSize waveSize;
@property (nonatomic, assign) CGFloat waveSpacing;
@property (nonatomic, assign) CGFloat waveDuration;
@property (nonatomic, strong) UIColor *waveColor;

parachvte

# -*- coding: UTF-8 -*-

import logging

from nameko.constants import AMQP_URI_CONFIG_KEY
from nameko.standalone.rpc import ServiceRpcProxy
from tornado.options import parse_command_line


def main():

parachvte

function [J, grad] = costFunctionReg(theta, X, y, lambda)                                                                                         
  m = length(y); % number of training examples
  
  h = sigmoid(X * theta);
  J = mean(-y .* log(h) - (1 - y) .* log(1 - h)) ...
      + lambda / 2.0 / m * (sum(theta .^ 2) - theta(1) ^ 2);
      
  grad = X' * (h - y) / m + lambda / m * theta;
  grad(1) -= lambda / m * theta(1);