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| p5js-week-07 [2022/06/11 08:15] – renick | p5js-week-07 [2023/06/26 00:48] (current) – reina.chen | ||
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| - **generalization** | - **generalization** | ||
| - | When we make a function which contains a procedure, we are using **encapsulation**. | + | When we make a function which contains a procedure, we are using <color black/ |
| < | < | ||
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| </ | </ | ||
| - | When we add arguments to our function so that the function can be used in more cases, we are using **generalization**. | + | When we add arguments to our function so that the function can be used in more cases, we are using <color black/ |
| < | < | ||
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| </ | </ | ||
| - | We are also using **generalization** when we structure our data into a class and use a constructor with arguments. | + | We are also using <color black/ |
| < | < | ||
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| ====making functions, including using arrow functions==== | ====making functions, including using arrow functions==== | ||
| - | We make functions starting with the " | + | We make functions starting with the <color black/ |
| - | Remember, the arguments are the input to our function: | + | Remember, the <color black/ |
| < | < | ||
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| </ | </ | ||
| - | Don't forget the return to get some output from the function! | + | Don't forget the <color black/ |
| - | We can also make functions in the arrow function style. One way is to assign it to a variable: | + | We can also make functions in the <color black/ |
| < | < | ||
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| ====various operators==== | ====various operators==== | ||
| - | We've practice several operators like all of the ones for arithmetic (+, -, *, / ), and the remainder operator (%) and increment operator (++) as well. | + | We've practice several operators like all of the ones for arithmetic (+, -, *, / ), and the <color black/ |
| We can use them to do math anywhere, like this: | We can use them to do math anywhere, like this: | ||
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| ====using booleans (true and false)==== | ====using booleans (true and false)==== | ||
| - | One operator that we learned about when we studied for-loops is the > (greater than) operator. There are also the < (less than) operator, the >= (greater than or equal) operator and the <= (less than or equal) operator. There' | + | One operator that we learned about when we studied for-loops is the |
| < | < | ||
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| ====structuring data using arrays, and using push, pop, and unshift to add and remove items from those arrays==== | ====structuring data using arrays, and using push, pop, and unshift to add and remove items from those arrays==== | ||
| - | We can collect data and put it into structure. One very important structure is arrays. We use push and unshift to add data to arrays. Let's do that for everyone' | + | We can collect data and put it into structure. One very important structure is <color black/ |
| < | < | ||
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| </ | </ | ||
| - | Don't forget that you can get items from an array using the indexes. Each position in an array has a number, starting with 0. | + | Don't forget that you can get items from an array using the <color black/ |
| < | < | ||
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| ====for-loops for repeating actions==== | ====for-loops for repeating actions==== | ||
| - | We have learned how to make for-loops to do things repeatedly. A for-loop has a first part in parentheses that describe the conditions for the for-loop: what number to start at (a counter), how long to run, and what to do with that counter. A for-loop has a second part in curly braces that says what you want to do on each loop. | + | We have learned how to make for-loops to do things repeatedly. A <color black/ |
| We can use one with the things we've made above. Let's find out how much toast we have to make to fill everyone' | We can use one with the things we've made above. Let's find out how much toast we have to make to fill everyone' | ||
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| ====using forEach instead of a for-loop==== | ====using forEach instead of a for-loop==== | ||
| - | We can rewrite totalToast using forEach instead. Remember that forEach is a method to be used on arrays. Instead of the code inside the for-loop above, we can use an arrow function. | + | We can rewrite totalToast using <color black/ |
| < | < | ||
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| ====structuring data using objects==== | ====structuring data using objects==== | ||
| - | We have another way to structure toast, not just as arrays. That is objects. Let's make an object for each toast order. | + | We have another way to structure toast, not just as arrays. That is <color black/ |
| - | There are properties on the left, each of which has a value on the right. Remember to separate the properties with commas. | + | There are <color black/ |
| < | < | ||
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| ====making classes so that making objects is easier and making those objects more useful==== | ====making classes so that making objects is easier and making those objects more useful==== | ||
| - | Since we want to make a lot of objects like this, we can make a class. A class is like a factory for objects. | + | Since we want to make a lot of objects like this, we can make a class. A <color black/ |
| < | < | ||
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| </ | </ | ||
| - | When we want to use the class, we call the constructor with the " | + | When we want to use the class, we call the constructor with the <color black/ |
| < | < | ||
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| You can see after you run this a few times that the shapes created aren't always great when the Points are random. You can think about some ways to solve this. Still, this will be easy to use if you specify the Points. | You can see after you run this a few times that the shapes created aren't always great when the Points are random. You can think about some ways to solve this. Still, this will be easy to use if you specify the Points. | ||
| - | This sometimes makes what is called a self-intersecting | + | This sometimes makes what is called a __self-intersecting |
| https:// | https:// | ||
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| ===== algorithms ===== | ===== algorithms ===== | ||
| - | We want either convex or concave polygons. We can write a set of rules to give us the output we want. We know one word for this: __procedure__. Another word we can use to call such sets of rules is __" | + | We want either convex or concave polygons. We can write a set of rules to give us the output we want. We know one word for this: <color black/ |
| https:// | https:// | ||
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| ===== turning our algorithm into an abstraction ===== | ===== turning our algorithm into an abstraction ===== | ||
| - | We want an abstraction, | + | We want an <color black/ |
| In this case, we need some components. We'll need to: | In this case, we need some components. We'll need to: | ||
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| </ | </ | ||
| - | Now we can put these together to make a function that give us a list of points to be used to make a non-intersecting | + | Now we can put these together to make a function that give us a list of points to be used to make a __non-intersecting |
| < | < | ||
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| ===== map ===== | ===== map ===== | ||
| - | Like forEach, map is a method for arrays. The big difference is that map applies a function to each item in the array and then returns an array filled with the result of those function calls. Like forEach, it's common to use an arrow function with map. We often use it with a one-argument function. There are other possibilities which we might look at later. | + | Like forEach, |
| For example, if we have an array of numbers, we can do some math with those numbers and get a new array. | For example, if we have an array of numbers, we can do some math with those numbers and get a new array. | ||