Basic data structure

Author: Yasholo

Basic-Data-Structures/01.Use-an-Array-to-Store-a-Collection-of-Data_script.js

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+let yourArray = ['one', 2, 'three', true, false, undefined, null]

Basic-Data-Structures/02.Access-an-Array-s-Using-Bracket-Notation_script.js

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+let myArray = ["a", "b", "c", "d"];
+myArray[1] = "g"
+console.log(myArray);

Basic-Data-Structures/03.Add-Items-to-an-Array-with-push()-and-unshift()_script.js

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+function mixedNumbers(arr) {
+  arr.unshift("I", 2, "three");
+  arr.push(7, "VIII", 9);
+  return arr;
+}
+
+console.log(mixedNumbers(['IV', 5, 'six']));

Basic-Data-Structures/04.Remove-Items-from-an-Array-with-pop()-and-shift()_script.js

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+function popShift(arr) {
+    let popped = arr.pop();
+    let shifted = arr.shift();
+    return [shifted, popped];
+  }
+  
+  console.log(popShift(['challenge', 'is', 'not', 'complete']));

Basic-Data-Structures/05.Remove-Items-Using-splice()_script.js

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+const arr = [2, 4, 5, 1, 7, 5, 2, 1];
+arr.splice(2, 1);
+arr.splice(3, 2);
+console.log(arr);

Basic-Data-Structures/06.Add-Items-Using-splice()_script.js

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+function htmlColorNames(arr) {
+    arr.splice(0, 2, 'DarkSalmon', 'BlanchedAlmond');
+    return arr;
+  }
+  
+  console.log(htmlColorNames(['DarkGoldenRod', 'WhiteSmoke', 'LavenderBlush', 'PaleTurquoise', 'FireBrick']));

Basic-Data-Structures/07.Copy-Array-Items-Using-slice()_script.js

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+function forecast(arr) {
+    arr = arr.slice(2, 4);
+    return arr;
+  }
+  
+  console.log(forecast(['cold', 'rainy', 'warm', 'sunny', 'cool', 'thunderstorms']));

Basic-Data-Structures/08.Copy-an-Array-with-the-Spread-Operator_script.js

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+function copyMachine(arr, num) {
+    let newArr = [];
+    while (num >= 1) {
+      newArr.push([...arr]);
+      num--;
+    }
+    return newArr;
+  }
+  
+  console.log(copyMachine([true, false, true], 2));

Basic-Data-Structures/09.Combine-Arrays-with-the-Spread-Operator_script.js

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+function spreadOut() {
+    let fragment = ['to', 'code'];
+    let sentence = ['learning', ...fragment, 'is', 'fun'];
+    
+      return sentence;
+    }
+    
+    console.log(spreadOut());

Basic-Data-Structures/10.Check-For-The-Presence-of-an-Element-With-indexOf()_script.js

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+function quickCheck(arr, elem) {
+    return arr.indexOf(elem) < 0 ? false : true;
+  }
+  
+  console.log(quickCheck(['squash', 'onions', 'shallots'], 'mushrooms'));