* fix: move "Explore Differences Between..." to basic JS, update seed and tests * fix: resequence "Declare String Variables" * fix: move "Declare a Read-Only Variable..." to basic JS, update seed and tests * fix: revert changes to non-English "Explore Differences Between..." test text * fix: revert test strings, solutions, and seeds for non-English challenges * fix: update "Declare String Variables" description * fix: sync quotation marks in description and seed * fix: modify note in "Declare a Read-Only..." challenge * fix: update operator and compound assignment challenges * fix: update string challenges * fix: update array and array method challenges * fix: update function and scope challenges, resequence slightly * fix: "Word Blanks" solution * fix: add spacing to seed * fix: concatenating += challenge spacing * fix: appending variables to strings spacing * fix: find the length of a string spacing * fix: removed instances of removedFromMyArray = 0 * fix: switch challenges * fix: function argument and param spacing * fix: update counting cards, object challenges, and record collection * fix: finish rest of Basic JS section * fix: introducing else statements solution * fix: update spacing and wording * fix: update wording for const challenge * fix: update functional programming challenges * fix: intermediate algorithms and cert challenges * fix: revert some spacing and remove comments for fp challenge solutions * feat: add notes with links to moved let and const challenges in first two es6 challenges * fix: update es6 intro text * Update curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/concatenating-strings-with-the-plus-equals-operator.md Co-authored-by: Shaun Hamilton <shauhami020@gmail.com> * Update curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/finding-a-remainder-in-javascript.md Co-authored-by: Shaun Hamilton <shauhami020@gmail.com> * Update curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/global-scope-and-functions.md Co-authored-by: Shaun Hamilton <shauhami020@gmail.com> * Update curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/iterate-through-an-array-with-a-for-loop.md Co-authored-by: Shaun Hamilton <shauhami020@gmail.com> * Update curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/iterate-through-an-array-with-a-for-loop.md Co-authored-by: Shaun Hamilton <shauhami020@gmail.com> * Update curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming/implement-map-on-a-prototype.md Co-authored-by: Shaun Hamilton <shauhami020@gmail.com> * Update curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/declare-a-read-only-variable-with-the-const-keyword.md Co-authored-by: Shaun Hamilton <shauhami020@gmail.com> * fix: concatenating strings with plus operator seed * fix: add comments back to Declare a Read-Only Variable... seed * feat: add es6 to basic javascript redirect tests for let and const challenges * fix: revert "Concatenating Strings with Plus Operator" seed * fix: move test file to cypress/integration/learn/redirects, separate redirect tests Co-authored-by: Shaun Hamilton <shauhami020@gmail.com>
122 lines
1.9 KiB
Markdown
122 lines
1.9 KiB
Markdown
---
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id: 56533eb9ac21ba0edf2244cd
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title: Accessing Nested Arrays
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challengeType: 1
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videoUrl: 'https://scrimba.com/c/cLeGDtZ'
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forumTopicId: 16160
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dashedName: accessing-nested-arrays
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---
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# --description--
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As we have seen in earlier examples, objects can contain both nested objects and nested arrays. Similar to accessing nested objects, array bracket notation can be chained to access nested arrays.
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Here is an example of how to access a nested array:
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```js
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const ourPets = [
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{
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animalType: "cat",
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names: [
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"Meowzer",
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"Fluffy",
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"Kit-Cat"
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]
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},
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{
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animalType: "dog",
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names: [
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"Spot",
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"Bowser",
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"Frankie"
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]
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}
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];
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ourPets[0].names[1];
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ourPets[1].names[0];
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```
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`ourPets[0].names[1]` would be the string `Fluffy`, and `ourPets[1].names[0]` would be the string `Spot`.
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# --instructions--
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Using dot and bracket notation, set the variable `secondTree` to the second item in the `trees` list from the `myPlants` object.
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# --hints--
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`secondTree` should equal the string `pine`.
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```js
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assert(secondTree === 'pine');
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```
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Your code should use dot and bracket notation to access `myPlants`.
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```js
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assert(/=\s*myPlants\[1\].list\[1\]/.test(code));
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```
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# --seed--
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## --after-user-code--
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```js
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(function(x) {
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if(typeof x != 'undefined') {
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return "secondTree = " + x;
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}
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return "secondTree is undefined";
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})(secondTree);
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```
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## --seed-contents--
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```js
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const myPlants = [
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{
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type: "flowers",
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list: [
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"rose",
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"tulip",
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"dandelion"
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]
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},
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{
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type: "trees",
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list: [
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"fir",
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"pine",
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"birch"
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]
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}
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];
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const secondTree = "";
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```
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# --solutions--
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```js
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const myPlants = [
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{
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type: "flowers",
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list: [
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"rose",
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"tulip",
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"dandelion"
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]
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},
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{
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type: "trees",
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list: [
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"fir",
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"pine",
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"birch"
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]
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}
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];
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const secondTree = myPlants[1].list[1];
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```
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