jyliang

const _ = require('lodash')
/**
 * Deep diff between two object, using lodash
 * @param  {Object} object Object compared
 * @param  {Object} base   Object to compare with
 * @return {Object}        Return a new object who represent the diff
 */
function difference(object, base) {
  function changes(object, base) {

jyliang

https://docs.google.com/presentation/d/19AiyALt7-t5MZLBgTubaJ66njM2GLTO54oOiMG1KAog/edit#slide=id.g13a6caa795_0_7

#define BMTDollarReader(fieldName) \
- (double)fieldName ## Value { \
  return BMTCentsToDollars(self.fieldName ## CentsValue); \
} \
\
- (NSNumber *)fieldName { \
  return self.fieldName ## Cents ? @(self.fieldName ## Value) : nil; \
} \

jyliang

// PLRK_SEL_STRING is for specifying selector (usually property) names to KVC
// or KVO methods.
// In debug it will generate warnings for undeclared selectors if
// -Wunknown-selector is turned on.
// In release it will have no runtime overhead.
#ifndef PLRK_SEL_STRING
#ifdef Debug
#define PLRK_SEL_STRING(selName) NSStringFromSelector(@selector(selName))
#else
#define PLRK_SEL_STRING(selName) @#selName

jyliang

+ (Class)viewModelClassForModel:(Class)modelClass {
  NSString *modelClassString = NSStringFromClass(modelClass);
  NSInteger suffixLength = [@"Model" length];
  NSString *viewModelClassString;
  NSRange range = NSMakeRange(modelClassString.length - suffixLength, suffixLength);
  viewModelClassString = [modelClassString stringByReplacingCharactersInRange:range
                                                                   withString:@"ViewModel"];
  Class viewModelClass = NSClassFromString(viewModelClassString);
  if (!viewModelClass) {
    NSLog(@"Internal Name convention broken.");

jyliang

//
//  Signal+Extensions.swift
//  Khan Academy
//
//  Created by Nacho Soto on 10/1/15.
//  Copyright © 2015 Khan Academy. All rights reserved.
//

import ReactiveCocoa
import Result

jyliang

    return RACSignal.createSignal({
      (subscriber: RACSubscriber!) -> RACDisposable! in

      return nil
    })

jyliang

@interface UIView (FrameObserver)
@end

@implementation UIView (FrameObserver)

- (void)observerFrame {
  [self addObserver:self forKeyPath:@"frame" options:0 context:NULL];
  [self.layer addObserver:self forKeyPath:@"bounds" options:0 context:NULL];
  [self.layer addObserver:self forKeyPath:@"transform" options:0 context:NULL];
  [self.layer addObserver:self forKeyPath:@"position" options:0 context:NULL];

jyliang

- (void)registerKeyboardNotifications {
    NSNotificationCenter *dnc = [NSNotificationCenter defaultCenter];
    [dnc addObserver:self selector:@selector(keyboardWillShow:) name:UIKeyboardWillShowNotification object:nil];
    [dnc addObserver:self selector:@selector(keyboardWillHide:) name:UIKeyboardWillHideNotification object:nil];

    [dnc addObserver:self selector:@selector(keyboardDidShow:) name:UIKeyboardDidShowNotification object:nil];
    [dnc addObserver:self selector:@selector(keyboardDidHide:) name:UIKeyboardDidHideNotification object:nil];
}

- (void)unregisterKeyboardNotifications {

jyliang

@interface NSObject (category)

@property (nonatomic, copy, setter = setObjectInfo:) id objectInfo;

@end

#import <objc/runtime.h>
static char kObjectInfoDictionaryKey;

@implementation NSObject (category)

jyliang

- (void)modifyView:(UIView *)view animated:(BOOL)animated {
    void (^block)() = ^{
        //modify view animation progress
    };

    void (^completion)(BOOL) = ^(BOOL finished){
        //modify view completion
    };

    if (animated) {