-
Notifications
You must be signed in to change notification settings - Fork 0
/
review.js
95 lines (72 loc) · 1.81 KB
/
review.js
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
// let vs const
let num = 5;
// num = 11;
let nameString = "jglay";
// the following will not work because nameString is a constant
// nameString = "JP";
// DO NOT DO THIS
// var otherString = "dfsdfs";
// otherString = "dfsdfs";
// data types
const numA = 10;
const str = "Some sort of string";
const floatA = 4.5;
const arrayOfNumbers = [1, 2, 3, 4, 5];
// this will check the data type
typeof str;
// conditionals
if (num > 10) {
console.log("Number is greater than 10");
} else if (num < 10) {
console.log("Number is less than 10");
} else {
console.log("Number is equal to 10");
}
// always use strict equality to compare values
console.log(0 === 1);
// loops
// const counter = 4;
// while (nameString === "jglay") {
// console.log("nameString is set to jglay");
// if (counter === 3) {
// nameString = "orlando";
// }
// }
// let counter = 0;
// while (counter < 10) {
// console.log("Counter is: ", counter);
// counter++;
// }
// for
for (let counter = 0; counter < 10; ++counter) {
console.log("Counter is: ", counter);
}
// arrays
const emptyArray = [];
const arrayOfSize1 = ["sdklfjkdslfj"];
// indices start at 0... so orlando is in index 0 and gina is in index 3
const array = ["orlando", "daniel", "susan", "gina"];
emptyArray.push(11);
emptyArray.push(-43);
console.log(emptyArray);
emptyArray[0] = 90;
emptyArray[1] = 43;
// go thru an array in reverse
for (let i = emptyArray.length - 1; i >= 0; --i) {
console.log(
"The current element of within the empty array is: ",
emptyArray[i]
);
}
// functions
function greet(names) {
// console.log("Hello ", name, "!");
for (let i = 0; i < names.length; ++i) {
console.log("Hello ", names[i], "!");
}
}
greet(["Michael", "Orlando", "Elisha"]);
function subtract(argA, argB) {
return argA - argB;
}
console.log(subtract(10, 9));