Omar Qaterge homework week3 - #98
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paulbremer
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paulbremer
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Good job Omar! Some small comments and it looks like you forgot task 15?
Task 15: Write some code to test two arrays for equality using == and ===.
Take a look at the code and check if arrays are the same using == and ===. Try console.logging the output; console.log(x == y); // false
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| //1 | |||
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This is the homework from week2, try to include only the homework for the current week in the pull request. You can make a new branch from master and work from there.
| console.log("using splice() a method that changes the contents of an array by removing or replacing existing elements and/or adding new elements)\n \ | ||
| in .splice(1, 0, 'meerkat') the 1 defines the index that i want to work with and 0 defines the number of elements that i want to replace.\n \ | ||
| so the value of the array will be:\n \ | ||
| [\"blowfish\", \"meerkat\", \"capricorn\", \"giraffe\", \"turtle\"]"); |
| console.log("The array has a length of: " + favoriteAnimals.length); | ||
| favoriteAnimals.splice(3,1); // delete giraffe from the previous array | ||
| console.log(favoriteAnimals); | ||
| console.log("The item you are looking for is at index: " + favoriteAnimals.findIndex(animal => animal === "meerkat")); |
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This works but a better function is to use the indexOf if you want to search for a simple value, indexOf('meerkat'). You can read more about the differences of findIndex and indexOf here https://stackoverflow.com/questions/41443029/difference-between-indexof-and-findindex-function-of-array
| //1 | ||
| function sum(x, y, z) { | ||
| const result = x + y + z; | ||
| return result; |
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You can even return the statement and don't need to make a const; return x + y + z
| //---------------------------------------------------- | ||
| console.log(vehicle["aircraft"]["id2"]); | ||
| //logs helicopter | ||
| console.log(vehicle[thirdKey]["id2"]); |
| } | ||
| else if(code === 4){ | ||
| i = vehicles[3] | ||
| } |
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This is fine but you can already see that it becomes a bit cumbersome to write almost the same code over and over again. With larger if statements you can look if a loop is better suited for the job.
| else {vehicleToService += vehicles[counter] + "s, ";} | ||
| } | ||
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| console.log(" \"Amazing Joe's Garage, we service" , vehicleToService,"\""); |
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There is no need for the slashes here console.log("Amazing Joe's Garage, we service" , vehicleToService);, this works fine. You could even use backticks which makes it even easier to work with variables and strings, see https://developer.mozilla.org/en/docs/Web/JavaScript/Reference/Template_literals
| console.log(o3); | ||
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| //Does the order that you assign (o3 = o2 or o2 = o3) matter? | ||
| //yes, because the right side is being assigned to the left side, otherwise it will show that the variable is not defined. |
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Yes that is correct. You changed foo on the o2 object, try this exercise again but this time change the whole object so o2 = { foo: "something" }. See if that changes anything.
| //13 | ||
| const person = {htmlCss:"Philipp Beau", cli:"Unmesh Joshi", JavaScript:"Yash Kapila"}; | ||
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| typeof typeof bar; | ||
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| //typeof bar; returns "number" because a number is assigned to bar as a value | ||
| //typeof typeof bar; returns "string" because it is returning the type of "number" which is a string No newline at end of file |
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