feat: ✨ adding string manipulation problems

Author: LucasRohr

code/dist/lengthOfLongestSubstring.js

@@ -0,0 +1,30 @@
+function lengthOfLongestSubstring(text: string): number {
+  let maxLength = 0
+  let substringText = ''
+  const textList = text.split('')
+
+  if (text.length === 0) {
+    return 0
+  }
+
+  textList.forEach((char) => {
+    if (!substringText.includes(char)) {
+      substringText = substringText.concat(char)
+    } else {
+      substringText = char
+    }
+
+    if (substringText.length > maxLength) {
+      maxLength = substringText.length
+    }
+  })
+
+  return maxLength
+}
+
+function mainLengthOfLongestSubstring() {
+  const response = lengthOfLongestSubstring('abcabcbb')
+  console.log(response)
+}
+
+mainLengthOfLongestSubstring()

code/dist/lengthOfLongestSubstring.js.map

@@ -16,7 +16,7 @@ function matchingStrings(stringList: string[], queries: string[]): number[] {
   return resultsList
 }
 
-function main() {
+function mainMatchingStrings() {
   let stringList: string[] = ['def', 'de', 'fgh']
   let queries: string[] = ['de', 'lmn', 'fgh']
 
@@ -25,4 +25,4 @@ function main() {
   console.log(result)
 }
 
-main()
+mainMatchingStrings()

code/dist/matching-strings.js

@@ -0,0 +1,33 @@
+function reverseInteger(x: number): number {
+  const NEGATIVE_SIGN = '-'
+  const LOW_INT_INTERVAL = -(2 ** 31)
+  const UPPER_INT_INTERVAL = 2 ** 31 - 1
+
+  // Transform number in char list
+  const stringNumber: string = x.toString()
+  const stringNumberList: string[] = stringNumber.split('')
+
+  // Check if value is negative, if so, adds - to the end of the list
+  const isNegative: boolean = x < 0
+
+  if (isNegative) {
+    stringNumberList.push(NEGATIVE_SIGN)
+  }
+
+  // Reverses the list and join into a string
+  stringNumberList.reverse()
+  const reversedString: string = stringNumberList.join('')
+
+  // Parses back to integer
+  const numberResult = parseInt(reversedString)
+  const isValidResult = numberResult >= LOW_INT_INTERVAL && numberResult <= UPPER_INT_INTERVAL
+
+  return isValidResult ? parseInt(reversedString) : 0
+}
+
+function mainReverseInteger() {
+  const response = reverseInteger(-123)
+  console.log(response)
+}
+
+mainReverseInteger()