1
00:00:00,300 --> 00:00:02,630
Okay, so branching statements.

2
00:00:02,630 --> 00:00:05,150
We talked very briefly about break,
Ken you talked about

3
00:00:05,150 --> 00:00:07,890
maybe you're going down the wall and
you go woo, this milk's bad now.

4
00:00:07,890 --> 00:00:09,720
You want to break,
you want to just get out of this loop.

5
00:00:09,720 --> 00:00:12,090
Get me out of here, I don't want to drink
sour milk, the rest of these are all bad.

6
00:00:12,090 --> 00:00:13,400
You can break out of the loop.

7
00:00:13,400 --> 00:00:14,010
It's a keyword.

8
00:00:14,010 --> 00:00:18,070
If you're inside of the loop and
you say break, it will stop going.

9
00:00:18,070 --> 00:00:20,413
Continue, we'll look at here in a second,
but

10
00:00:20,413 --> 00:00:24,289
what it does is as you're going through
each one of the lines of the code there.

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00:00:24,289 --> 00:00:27,699
If you want to not run the rest of
the lines below, you can call continue and

12
00:00:27,699 --> 00:00:30,009
it will jump back to the top and
run through again.

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00:00:30,009 --> 00:00:31,930
Labels are a thing.

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00:00:31,930 --> 00:00:36,540
You can be inside of a loop and
say break, and

15
00:00:36,540 --> 00:00:40,280
somehow they avoided the words saying
go to, but you can go to a label.

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And through the history of programming,
go to is a bad thing.

17
00:00:43,630 --> 00:00:45,830
It creates what is known
as spaghetti code.

18
00:00:45,830 --> 00:00:47,360
Which means that you
try to follow code and

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00:00:47,360 --> 00:00:50,230
it looks like little strands of spaghetti.

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00:00:50,230 --> 00:00:51,980
And it's not a good thing.

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00:00:51,980 --> 00:00:54,010
You can solve a lot without using a label.

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00:00:54,010 --> 00:00:56,250
So I say use them sparingly,
they're not common.

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00:00:56,250 --> 00:01:00,565
And if you get into a situation where
you want to use one, check yourself.

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[LAUGH]
You don't want to

25
00:01:03,730 --> 00:01:04,400
introduce spaghetti code.

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You don't want somebody looking at your
code, trying to be like, I went up here.

27
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Am I over here, where?

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00:01:08,050 --> 00:01:09,130
You don't want that.

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But they do exist, and you might see them.

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00:01:11,210 --> 00:01:12,060
And you can also return.

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00:01:12,060 --> 00:01:14,450
If you're inside of a loop, and
there's something that you're, like, oh,

32
00:01:14,450 --> 00:01:15,400
this method's done.

33
00:01:15,400 --> 00:01:16,708
I don't need to do this
thing at all anymore.

34
00:01:16,708 --> 00:01:17,530
This whole method [INAUDIBLE].

35
00:01:17,530 --> 00:01:20,524
You can just call a return method there,
and the loop will stop and

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00:01:20,524 --> 00:01:21,980
jump out, pop out.

37
00:01:21,980 --> 00:01:24,858
Okay, so the last example that we
have is the t-shirt give away.

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00:01:24,858 --> 00:01:29,978
So, while there's prizes left,
we're gonna ask Is the attendee present?

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00:01:29,978 --> 00:01:32,039
If they're not here,
we're gonna try again.

40
00:01:32,039 --> 00:01:34,970
And let's try again here,
can anybody think of what that is?

41
00:01:34,970 --> 00:01:35,780
What's this try again?

42
00:01:35,780 --> 00:01:37,419
We're gonna jump back up to the while.

43
00:01:38,560 --> 00:01:40,700
There we go, continue, excellent.

44
00:01:40,700 --> 00:01:43,084
So we're going to continue,
we're going to come back up and

45
00:01:43,084 --> 00:01:44,318
say is the attendant present?

46
00:01:44,318 --> 00:01:45,958
If they are here,
we're gonna ask what size.

47
00:01:45,958 --> 00:01:47,568
And the reason why we
don't want to continue,

48
00:01:47,568 --> 00:01:49,660
we don't want to ask what
size if they're not here.

49
00:01:49,660 --> 00:01:51,390
There's no point to do this
extra work that's down here,

50
00:01:51,390 --> 00:01:53,050
we're not gonna give away
a shirt to nobody either.

51
00:01:53,050 --> 00:01:53,790
So we have to do that.

52
00:01:53,790 --> 00:01:59,570
So what I did was I wrote some JavaScript
that [INAUDIBLE] the meetup attendees.

53
00:01:59,570 --> 00:02:02,600
And not 90 people are here, so
we might have a continue problem.

54
00:02:02,600 --> 00:02:04,240
We might need to check a continue, but

55
00:02:04,240 --> 00:02:08,820
I am going to randomly sort that list and
give out some t-shirts.

56
00:02:08,820 --> 00:02:09,449
That sound good?

57
00:02:09,449 --> 00:02:11,108
All right, you get a shirt,
you get a shirt.

58
00:02:11,108 --> 00:02:15,269
>> [LAUGH]
>> All right, so

59
00:02:15,269 --> 00:02:18,660
the t-shirt code is in here,
called prizes.

60
00:02:21,140 --> 00:02:22,349
Let's bring this down.

61
00:02:22,349 --> 00:02:26,045
So I have a list that you don't need
to see, that returns a shuffled

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00:02:26,045 --> 00:02:29,820
list of all of the Rsvps.shuffled
at the time that we run this code.

63
00:02:29,820 --> 00:02:32,886
And I am gonna keep track of
the prizes that are given away,

64
00:02:32,886 --> 00:02:36,370
and I am also gonna keep
track of the drawingNumber.

65
00:02:36,370 --> 00:02:40,101
And while we've given away five,

66
00:02:40,101 --> 00:02:45,769
we are going to pull out of
the RSVP list that number.

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00:02:45,769 --> 00:02:46,809
This is that for loop.

68
00:02:46,809 --> 00:02:49,151
We could have written this with a for
loop, but

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00:02:49,151 --> 00:02:51,448
notice that I'm using this drawing number.

70
00:02:51,448 --> 00:02:54,268
We're gonna say, Is the person present?

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00:02:54,268 --> 00:03:00,547
If they're here and
I have to remember to type no.

72
00:03:00,547 --> 00:03:04,247
Then we're gonna continue.

73
00:03:04,247 --> 00:03:05,587
So we're calling the continue keyword.

74
00:03:05,587 --> 00:03:06,766
It's gonna go back up to the top.

75
00:03:06,766 --> 00:03:08,790
It's not gonna run the rest of this.

76
00:03:08,790 --> 00:03:11,160
And then we're gonna
ask what size you are.

77
00:03:11,160 --> 00:03:14,070
You can kinda imagine multiple
bits of this continue or

78
00:03:14,070 --> 00:03:15,790
multiple bits of this break.

79
00:03:15,790 --> 00:03:17,650
This isn't working and there's a break.

80
00:03:18,800 --> 00:03:24,150
Let's imagine that we went past 30 people
and nobody's here, we would call break.

81
00:03:24,150 --> 00:03:25,850
We can put in different
sorts of things in here.

82
00:03:25,850 --> 00:03:27,740
You could have a continue in here,
you could have a break in here,

83
00:03:27,740 --> 00:03:31,000
that sort of thing.

84
00:03:31,000 --> 00:03:32,990
Then we'll do the prizes given away.

85
00:03:32,990 --> 00:03:38,520
So I'm gonna assume that you
publicly joined a meetup,

86
00:03:38,520 --> 00:03:40,880
and your name's on the page already.

87
00:03:40,880 --> 00:03:43,360
Your name might be in Treehouse Video,
maybe.

88
00:03:43,360 --> 00:03:45,844
So you kind of win two prizes,
you win a shirt and Treehouse and

89
00:03:45,844 --> 00:03:48,728
you'll be bummed out if you weren't here,
cuz your name's gonna be in a video.

90
00:03:48,728 --> 00:03:50,949
>> And you don't have a shirt.

91
00:03:50,949 --> 00:03:54,359
>> If your name's in the video and
you see this at home and you weren't here,

92
00:03:54,359 --> 00:03:55,789
I'll send you a shirt, okay.

93
00:03:55,789 --> 00:03:59,228
>> [LAUGH]
>> You're gonna get so busted.

94
00:03:59,228 --> 00:04:03,700
All right, [LAUGH] all right.

95
00:04:03,700 --> 00:04:04,560
Her we go.

96
00:04:04,560 --> 00:04:05,608
Winners, look at winners.

97
00:04:08,688 --> 00:04:10,430
Is Eric Ewer's present?

98
00:04:11,870 --> 00:04:12,588
No Eric Ewers.

99
00:04:12,588 --> 00:04:14,609
So, here we go.

100
00:04:14,609 --> 00:04:17,148
I'm gonna say no and it's gonna continue.

101
00:04:19,249 --> 00:04:20,788
Summer present?

102
00:04:20,788 --> 00:04:22,309
Yeah, all right.

103
00:04:22,309 --> 00:04:24,899
>> [APPLAUSE]
>> So I'm gonna say anything.

104
00:04:24,899 --> 00:04:29,759
I'm gonna say, yep, Summer's here,
and what's your t-shirt size?

105
00:04:29,759 --> 00:04:30,579
>> Small.

106
00:04:30,579 --> 00:04:31,939
>> Small, okay.

107
00:04:31,939 --> 00:04:36,578
Path's posse, path post.

108
00:04:36,578 --> 00:04:37,938
>> Yeah, that's me.

109
00:04:37,938 --> 00:04:38,599
>> That's you?

110
00:04:38,599 --> 00:04:43,658
Yeah, all right, so
we'll loop here till we hit five.

111
00:04:43,658 --> 00:04:44,578
All right.

112
00:04:48,539 --> 00:04:50,568
I'm not actually gonna
use this data we're just,

113
00:04:50,568 --> 00:04:52,278
I was kind of trying to
show that we did the.

114
00:04:52,278 --> 00:04:57,735
Sarah I know her, and
she is not here, Sarah.

115
00:04:57,735 --> 00:04:59,928
>> [LAUGH]
>> Is Amy present?

116
00:04:59,928 --> 00:05:00,829
All right.

117
00:05:00,829 --> 00:05:07,153
>> [APPLAUSE]
>> Ashley.

118
00:05:07,153 --> 00:05:12,513
>> [APPLAUSE]
>> All right,

119
00:05:12,513 --> 00:05:16,233
Simone Flore?

120
00:05:16,233 --> 00:05:17,693
No, Simone.

121
00:05:17,693 --> 00:05:20,513
>> [LAUGH]
>> Yeah.

122
00:05:20,513 --> 00:05:27,272
>> [APPLAUSE]
>> There we go.