Repository navigation
Expand file tree
/
Copy path4.FindLongestWordLength.js
More file actions
171 lines (144 loc) · 7.8 KB
/
Copy path4.FindLongestWordLength.js
File metadata and controls
171 lines (144 loc) · 7.8 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
function findLongestWord(str) {
// Step 1. Split the string into an array of strings
var strSplit = str.split(' ');
// var strSplit = "The quick brown fox jumped over the lazy dog".split(' ');
// var strSplit = ["The", "quick", "brown", "fox", "jumped", "over", "the", "lazy", "dog"];
// Step 2. Initiate a variable that will hold the length of the longest word
var longestWord = 0;
// Step 3. Create the FOR loop
for(var i = 0; i < strSplit.length; i++){
if(strSplit[i].length > longestWord){ // If strSplit[i].length is greater than the word it is compared with...
longestWord = strSplit[i].length; // ...then longestWord takes this new value
}
}
/* Here strSplit.length = 9
For each iteration: i = ? i < strSplit.length? i++ if(strSplit[i].length > longestWord)? longestWord = strSplit[i].length
1st iteration: 0 yes 1 if("The".length > 0)? => if(3 > 0)? longestWord = 3
2nd iteration: 1 yes 2 if("quick".length > 3)? => if(5 > 3)? longestWord = 5
3rd iteration: 2 yes 3 if("brown".length > 5)? => if(5 > 5)? longestWord = 5
4th iteration: 3 yes 4 if("fox".length > 5)? => if(3 > 5)? longestWord = 5
5th iteration: 4 yes 5 if("jumped".length > 5)? => if(6 > 5)? longestWord = 6
6th iteration: 5 yes 6 if("over".length > 6)? => if(4 > 6)? longestWord = 6
7th iteration: 6 yes 7 if("the".length > 6)? => if(3 > 6)? longestWord = 6
8th iteration: 7 yes 8 if("lazy".length > 6)? => if(4 > 6)? longestWord = 6
9th iteration: 8 yes 9 if("dog".length > 6)? => if(3 > 6)? longestWord = 6
10th iteration: 9 no
End of the FOR Loop*/
//Step 4. Return the longest word
return longestWord; // 6
}
findLongestWord("The quick brown fox jumped over the lazy dog");
//WithoutComments
function findLongestWord(str) {
var strSplit = str.split(' ');
var longestWord = 0;
for(var i = 0; i < strSplit.length; i++){
if(strSplit[i].length > longestWord){
longestWord = strSplit[i].length;
}
}
return longestWord;
}
findLongestWord("The quick brown fox jumped over the lazy dog");
///The Sort Method Way
function findLongestWord(str) {
// Step 1. Split the string into an array of strings
var strSplit = str.split(' ');
// var strSplit = "The quick brown fox jumped over the lazy dog".split(' ');
// var strSplit = ["The", "quick", "brown", "fox", "jumped", "over", "the", "lazy", "dog"];
// Step 2. Sort the elements in the array
var longestWord = strSplit.sort(function(a, b) {
return b.length - a.length;
});
/* Sorting process
a b b.length a.length var longestWord
"The" "quick" 5 3 ["quick", "The"]
"quick" "brown" 5 5 ["quick", "brown", "The"]
"brown" "fox" 3 5 ["quick", "brown", "The", "fox"]
"fox" "jumped" 6 3 ["jumped", quick", "brown", "The", "fox"]
"jumped" "over" 4 6 ["jumped", quick", "brown", "over", "The", "fox"]
"over" "the" 3 4 ["jumped", quick", "brown", "over", "The", "fox", "the"]
"the" "lazy" 4 3 ["jumped", quick", "brown", "over", "lazy", "The", "fox", "the"]
"lazy" "dog" 3 4 ["jumped", quick", "brown", "over", "lazy", "The", "fox", "the", "dog"]
*/
// Step 3. Return the length of the first element of the array
return longestWord[0].length; // var longestWord = ["jumped", "quick", "brown", "over", "lazy", "The", "fox", "the", "dog"];
// longestWord[0]="jumped" => jumped".length => 6
}
findLongestWord("The quick brown fox jumped over the lazy dog");
//WithoutComments
function findLongestWord(str) {
var longestWord = str.split(' ').sort(function(a, b) { return b.length - a.length; });
return longestWord[0].length;
}
findLongestWord("The quick brown fox jumped over the lazy dog");
//Reduce Method
function findLongestWord(str) {
// Step 1. Split the string into an array of strings
var strSplit = str.split(' ');
// var strSplit = "The quick brown fox jumped over the lazy dog".split(' ');
// var strSplit = ["The", "quick", "brown", "fox", "jumped", "over", "the", "lazy", "dog"];
// Step 2. Use the reduce method
var longestWord = strSplit.reduce(function(longest, currentWord) {
if(currentWord.length > longest.length)
return currentWord;
else
return longest;
}, "");
/* Reduce process
currentWord longest currentWord.length longest.length if(currentWord.length > longest.length)? var longestWord
"The" "" 3 0 yes "The"
"quick" "The" 5 3 yes "quick"
"brown" "quick" 5 5 no "quick"
"fox" "quick" 3 5 no "quick"
"jumped" "quick" 6 5 yes "jumped"
"over" "jumped" 4 6 no "jumped"
"the" "jumped" 3 6 no "jumped"
"lazy" "jumped" 4 6 no "jumped"
"dog" "jumped" 3 6 no "jumped"
*/
// Step 3. Return the length of the longestWord
return longestWord.length; // var longestWord = "jumped"
// longestWord.length => "jumped".length => 6
}
findLongestWord("The quick brown fox jumped over the lazy dog");
//WithoutComments
function findLongestWord(str) {
var longestWord = str.split(' ').reduce(function(longest, currentWord) {
return currentWord.length > longest.length ? currentWord : longest;
}, "");
return longestWord.length;
}
findLongestWord("The quick brown fox jumped over the lazy dog");
//MathMax
function findLongestWordLength(s) {
return s.split(' ')
.reduce(function(x, y) {
return +Math.max(x, y.length)
},0);
}
findLongestWordLength("The quick brown fox jumpeed over the lazy dog");
//Advance Solution
function findLongestWordLength(str) {
//split the string into individual words
//(important!!, you'll see why later)
str = str.split(" ");
//str only has 1 element left that is the longest element,
//return the length of that element
if(str.length == 1){
return str[0].length;
}
//if the first element's length is greater than the second element's (or equal)
//remove the second element and recursively call the function)
if(str[0].length >= str[1].length){
str.splice(1,1);
return findLongestWordLength(str.join(" "));
}
//if the second element's length is greater than the first element's start
//call the function past the first element
if(str[0].length <= str[1].length){
// from the first element to the last element inclusive.
return findLongestWordLength(str.slice(1,str.length).join(" "));
}
}
findLongestWordLength("The quick brown fox jumpeed over the lazy dog");