brians arrays and strings

Author: githubwithbrian

arrays/exercises/package-lock.json

@@ -1,11 +1,9 @@
 let str = 'In space, no one can hear you code.';
 let arr = ['B', 'n', 'n', 5];
-
-//1) Use the split method on the string to identify the purpose of the parameter inside the ().
-
-//2) Use the join method on the array to identify the purpose of the parameter inside the ().
-
-//3) Do split or join change the original string/array?
-
-//4) We can take a comma-separated string and convert it into a modifiable array. Try it! Alphabetize the cargoHold string, and then combine the contents into a new string.
+console.log(str.split());
+console.log(str.split('e'));
+console.log(str.split(' '));
+console.log(str.split(''));
 let cargoHold = "water,space suits,food,plasma sword,batteries";
+cargoHold.join("water,space suits,food,plasma sword,batteries");
+console.log(cargoHold);

arrays/exercises/part-five-arrays.js

@@ -1,5 +1,11 @@
 let holdCabinet1 = ['duct tape', 'gum', 3.14, false, 6.022e23];
 let holdCabinet2 = ['orange drink', 'nerf toys', 'camera', 42, 'parsnip'];
+console.log(holdCabinet1.concat(holdCabinet2));
+console.log(holdCabinet1);
+holdCabinet1.reverse();
+console.log(holdCabinet1);
+holdCabinet2.sort();
+console.log(holdCabinet2)
 
 //Explore the methods concat, slice, reverse, and sort to determine which ones alter the original array.
 

arrays/exercises/part-four-arrays.js

@@ -1,5 +1,6 @@
-//Create an array called practiceFile with the following entry: 273.15
-
-//Use the bracket notation method to add "42" and "hello" to the array. Add these new items one at a time.  Print the array after each step to confirm the changes.
-
-//Use a single .push() to add the following items: false, -4.6, and "87".  Print the array to confirm the changes.
+let practiceFile = [273.15];
+practiceFile.push(42);
+practiceFile.push("hello");
+console.log(practiceFile);
+practiceFile.push(false, -4.6, "87")
+console.log(practiceFile);

arrays/exercises/part-one-arrays.js

@@ -1,11 +1,4 @@
-//Arrays can hold different data types, even other arrays! A multi-dimensional array is one with entries that are themselves arrays.
-
-//1) Define and initialize the arrays specified in the exercise to hold the name, chemical symbol and mass for different elements.
-
-//2) Define the array 'table', and use 'push' to add each of the element arrays to it. Print 'table' to see its structure.
-
-//3) Use bracket notation to examine the difference between printing 'table' with one index vs. two indices (table[][]).
-
-//4) Using bracket notation and the table array, print the mass of element1, the name for element 2 and the symbol for element26.
-
-//5) 'table' is an example of a 2-dimensional array. The first “level” contains the element arrays, and the second level holds the name/symbol/mass values. Experiment! Create a 3-dimensional array and print out one entry from each level in the array.
+let element1 = ['hydrogen', 'H', 1.008];
+let element2 = ['helium', 'He', 4.003];
+let element26 = ['iron', 'Fe', 55.85];
+console.log(table[1], table[1][1]);

arrays/exercises/part-six-arrays.js

@@ -1,4 +1,10 @@
 let cargoHold = [1138, 'space suits', 'parrot', 'instruction manual', 'meal packs', 'space tether', '20 meters'];
+cargoHold.splice(3,0,'keys');
+console.log(cargoHold);
+cargoHold.splice(3,'instruction manual');
+console.log(cargoHold);
+cargoHold.splice(2,3,'cat','fob','string cheese');
+console.log(cargoHold);
 
 //Use splice to make the following changes to the cargoHold array. Be sure to print the array after each step to confirm your updates.
 

arrays/exercises/part-three-arrays.js

@@ -1,11 +1,6 @@
 let cargoHold = ['oxygen tanks', 'space suits', 'parrot', 'instruction manual', 'meal packs', 'slinky', 'security blanket'];
-
-//1) Use bracket notation to replace ‘slinky’ with ‘space tether’. Print the array to confirm the change.
-
-//2) Remove the last item from the array with pop. Print the element removed and the updated array.
-
-//3) Remove the first item from the array with shift. Print the element removed and the updated array.
-
-//4) Unlike pop and shift, push and unshift require arguments inside the (). Add the items 1138 and ‘20 meters’ to the the array - the number at the start and the string at the end. Print the updated array to confirm the changes.
-
-//5) Use a template literal to print the final array and its length.
+cargoHold[5] = 'space tether';
+console.log(cargoHold);
+console.log(cargoHold.shift('oxygen tanks'));
+console.log(cargoHold);
+console.log(`The array ${cargoHold} has a length of ${cargoHold.length}.`);