Leida week 9 #1030
Leida week 9 #1030
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to follow previously sent common practice and instructions fixed some typos
Minor changes to make language consistent and simplify it where needed.
| @@ -47,7 +51,7 @@ function f1(val) { | |||
| } | |||
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| f1(x); | |||
| console.log(x); | |||
| console.log(x); (I am not sure why it outputs 9) | |||
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It outputs 9 because nothing happens to x after it is declared on line 46, the f1() function is called but that only adds 1 to variable val which is declared inside the function.
f1(x) would return 10 but that is not what is being logged to the console :)
| @@ -14,6 +14,8 @@ Take a look at the following code: | |||
| ``` | |||
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| Explain why line 4 and line 6 output different numbers. | |||
| // In line 1 a global variable is declared and assigned the value of 1, it will be available everywhere in the application. | |||
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Excellent explanation for this question well done!
| What will be the output of this code. Explain your answer in 50 words or less. | ||
| What will be the output of this code.// Explain your answer in 50 words or less. | ||
| Line 30 will print 10 to the console because x is a global variable. | ||
| Line 34 will print y is not defined, this is because y is a local variable only accessible inside the functiion. So this x it is out of scope for the console.log called on line 6. The function itself should return undefined. |
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Correct! (I am not sure what you are referring to on line 6 however, I think you might have a typo)
| @@ -57,7 +61,7 @@ function f2(val) { | |||
| } | |||
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| f2(y); | |||
| console.log(y); | |||
| console.log(y);// Returns 10. y is a parameter of function f2, it was declared and initialised with the value of 9 (line 56). Function f2 added 1 to x property and this updated y to 10 because why is equal to the value of the x property. | |||
| this.cart.push(item); | ||
| } | ||
| listItems() { | ||
| this.cart.forEach((item) => console.log(item)); |
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Great use of an arrow function and forEach here :)
| this.index = 0; | ||
| } | ||
| add(title, artist) { | ||
| this.playlist.push({ title, artist }); |
| this.playlist.push({ title, artist }); | ||
| } | ||
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| play() { |
| this.index++; | ||
| if (this.index <= this.playlist.length - 1) { | ||
| console.log( | ||
| `Currently playing: ${this.playlist[this.index].title} by ${ |
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you already have a function that does this, you could call your play function instead of typing out the whole console log again
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| skip() { | ||
| this.index++; | ||
| if (this.index <= this.playlist.length - 1) { |
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This is good but what happens if this is not true?
| previous() { | ||
| this.index -= 1; | ||
| console.log( | ||
| `Currently playing: ${this.playlist[this.index].title} by ${ |
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Great, just think about re-using your play function again as I mentioned above
Your Details
Your Name: Leida Goncalves
Your City: Manchester
Your Slack Name: Leida Gandy
Homework Details
Module: JS III Week 9
Week: JS III Week 9