Completed string exercises

esseelig · esseelig · commit ee62645ea14a · 2023-11-09T20:17:28.000-06:00
diff --git a/stringing-characters-together/exercises/part-one.js b/stringing-characters-together/exercises/part-one.js
@@ -1,10 +1,18 @@
 let num = 1001;
 
 //Returns 'undefined'.
-console.log(num.length);
+console.log(String(num).length);
 
 //Use type conversion to print the length (number of digits) of an integer.
 
 //Follow up: Print the number of digits in a DECIMAL value (e.g. num = 123.45 has 5 digits but a length of 6).
 
+let numDecimal = 123.45;
+console.log((String(numDecimal).length - 1));
+
 //Experiment! What if num could be EITHER an integer or a decimal?  Add an if/else statement so your code can handle both cases.
+if (String(num).includes(".")) {
+    console.log((String(num).length - 1));
+} else {
+    console.log(String(num).length);
+}
diff --git a/stringing-characters-together/exercises/part-three.js b/stringing-characters-together/exercises/part-three.js
@@ -4,14 +4,21 @@ let language = 'JavaScript';
 
 //1. Use string concatenation and two slice() methods to print 'JS' from 'JavaScript'
 
+console.log(language.slice(0, 1) + language.slice(4, 5));
+
 //2. Without using slice(), use method chaining to accomplish the same thing.
 
+console.log(language[language.indexOf("J")] + language[language.indexOf("S")]);
+
 //3. Use bracket notation and a template literal to print, "The abbreviation for 'JavaScript' is 'JS'."
+console.log(`The abbreviation for '${language}' is '${language[language.indexOf("J")] + language[language.indexOf("S")]}'.`);
 
 //4. Just for fun, try chaining 3 or more methods together, and then print the result.
+console.log(language.slice(3,6).replace("a","qx").toUpperCase());
 
 //Part Three section Two
 
 //1. Use the string methods you know to print 'Title Case' from the string 'title case'.
 
 let notTitleCase = 'title case';
+console.log(notTitleCase.slice(0,1).toUpperCase() + notTitleCase.slice(1).replace("c", "C"));
diff --git a/stringing-characters-together/exercises/part-two.js b/stringing-characters-together/exercises/part-two.js
@@ -4,17 +4,20 @@ let dna = " TCG-TAC-gaC-TAC-CGT-CAG-ACT-TAa-CcA-GTC-cAt-AGA-GCT    ";
 
 // First, print out the dna strand in it's current state.
 
+console.log(dna);
+
 //1) Use the .trim() method to remove the leading and trailing whitespace, then print the result.
 
-console.log(/* Your code here. */);
+console.log(dna.trim());
 
 //2) Change all of the letters in the dna string to UPPERCASE, then print the result.
 
-console.log();
+console.log(dna.trim().toUpperCase());
 
 //3) Note that after applying the methods above, the original, flawed string is still stored in dna. To fix this, we need to reassign the changes to back to dna.
 //Apply these fixes to your code so that console.log(dna) prints the DNA strand in UPPERCASE with no whitespace.
 
+dna = dna.trim().toUpperCase();
 console.log(dna);
 
 //Part Two Section Two
@@ -23,10 +26,23 @@ let dnaTwo = "TCG-TAC-GAC-TAC-CGT-CAG-ACT-TAA-CCA-GTC-CAT-AGA-GCT";
 
 //1) Replace the gene "GCT" with "AGG", and then print the altered strand.
 
+console.log("dnaTwo:");
+console.log(dnaTwo.replace("GCT", "AGG"));
+
 //2) Look for the gene "CAT" with ``indexOf()``. If found print, "CAT gene found", otherwise print, "CAT gene NOT found".
 
+// console.log(dnaTwo.indexOf("CAT"));
+if (dnaTwo.indexOf("CAT") > -1) {
+    console.log("CAT gene found")
+} else {
+    console.log("CAT gene NOT found")
+}
+
 //3) Use .slice() to print out the fifth gene (set of 3 characters) from the DNA strand.
+console.log(dnaTwo.slice(16, 19));
 
 //4) Use a template literal to print, "The DNA strand is ___ characters long."
+console.log(`The DNA strand is ${dnaTwo.replaceAll("-", "").length} characters long.`);
 
 //5) Just for fun, apply methods to ``dna`` and use another template literal to print, 'taco cat'.
+console.log(dna.slice(4, 9).replace("-G", "o ").toLowerCase() + dna.slice(40, 43).toLowerCase());
