diff --git a/.gitignore b/.gitignore
index 80ba8401d72..7fd1412ad07 100644
--- a/.gitignore
+++ b/.gitignore
@@ -20,6 +20,9 @@
 *.a
 *.so
 
+# C
+*.dylib
+
 # Mac OS X
 .DS_Store
 
diff --git a/libsqlite3-pcre.dylib b/libsqlite3-pcre.dylib
deleted file mode 100755
index 0f7ab623d94..00000000000
Binary files a/libsqlite3-pcre.dylib and /dev/null differ
diff --git a/sample.js b/sample.js
deleted file mode 100644
index e28c9415ca2..00000000000
--- a/sample.js
+++ /dev/null
@@ -1,237 +0,0 @@
-/**
- * # LED numerals exercise
- *
- * Write a command line program which takes a number and displays the “LED” version of
- * this number using underscores and vertical bars:
- *
- * $ led 757
- *  _   _  _
- *   | |_   |
- *   |  _|  |
- *
- * The first goal is just to get the above working. This likely will not take all of the
- * time. Use the stretch goals below to fill the time:
- *
- *     - Add a second parameter for bar length:
- *         $ led 757 2
- *          __   __  __
- *            | |      |
- *            | |__    |
- *            |    |   |
- *            |  __|   |
- *     - How do we test this for correctness? Write the tests.
- *     - How do we test this for performance? Write the tests.
- */
-
-const writeLED = led => {
-  let firstRow = ''
-  let secondRow = ''
-  let thirdRow = ''
-
-  // Split the LED number into digits
-  const digits = led.toString().split('')
-  // Get the LED pattern for each digit and build the rows with it
-  for (const digit of digits) {
-    firstRow += getTopLEDPattern(parseInt(digit, 10)) + ' '
-    secondRow += getMiddleLEDPattern(parseInt(digit, 10)) + ' '
-    thirdRow += getBottomLEDPattern(parseInt(digit, 10)) + ' '
-  }
-
-  console.log(`${firstRow}\n${secondRow}\n${thirdRow}`)
-}
-
-// TODO: Handle errors if digit > 9
-const getTopLEDPattern = digit => {
-  switch (digit) {
-    case 0:
-    case 2:
-    case 3:
-    case 5:
-    case 6:
-    case 7:
-    case 8:
-    case 9:
-      return ' _ '
-    case 1:
-    case 4:
-    default:
-      return '   '
-  }
-}
-
-const getMiddleLEDPattern = digit => {
-  switch (digit) {
-    case 0:
-      return '| |'
-    case 1:
-      return ' | '
-    case 2:
-    case 3:
-      return ' _|'
-    case 4:
-    case 8:
-    case 9:
-      return '|_|'
-    case 5:
-    case 6:
-      return '|_ '
-    case 7:
-    default:
-      return '  |'
-  }
-}
-
-const getBottomLEDPattern = digit => {
-  switch (digit) {
-    case 0:
-    case 6:
-    case 8:
-      return '|_|'
-    case 1:
-      return ' | '
-    case 2:
-      return '|_ '
-    case 3:
-    case 5:
-    case 9:
-      return ' _|'
-    case 4:
-    case 7:
-    default:
-      return '  |'
-  }
-}
-
-// writeLED(1234567890)
-// writeLED(10000)
-
-const writeLED2 = (led, barLength = 1) => {
-  let topRow = ''
-  let topVerticalsRow = ''
-  let middleRow = ''
-  let bottomVerticalsRow = ''
-  let bottomRow = ''
-
-  // Split the LED number into digits
-  const digits = led.toString().split('')
-  // Get the LED pattern for each digit and build the rows with it
-  for (const digit of digits) {
-    topRow += getTopLEDPattern2(parseInt(digit, 10), barLength) + ' '
-    topVerticalsRow += getTopVerticalsRowLEDPattern(parseInt(digit, 10), barLength) + ' '
-    middleRow += getMiddleLEDPattern2(parseInt(digit, 10), barLength) + ' '
-    bottomVerticalsRow += getBottomVerticalsRowLEDPattern(parseInt(digit, 10), barLength) + ' '
-    bottomRow += getBottomLEDPattern2(parseInt(digit, 10), barLength) + ' '
-  }
-
-  const topVerticals = new Array(barLength - 1).fill(topVerticalsRow).join('\n')
-  const bottomVerticals = new Array(barLength - 1).fill(bottomVerticalsRow).join('\n')
-
-  console.log(
-    `${topRow}\n${topVerticals}${barLength > 1 ? '\n' : ''}${middleRow}\n${bottomVerticals}${
-      barLength > 1 ? '\n' : ''
-    }${bottomRow}`
-  )
-}
-
-// TODO: Handle errors if digit > 9
-const getTopLEDPattern2 = (digit, barLength) => {
-  switch (digit) {
-    case 0:
-    case 2:
-    case 3:
-    case 5:
-    case 6:
-    case 7:
-    case 8:
-    case 9:
-      return ' ' + '_'.repeat(barLength) + ' '
-    case 1:
-    case 4:
-    default:
-      return ' ' + ' '.repeat(barLength) + ' '
-  }
-}
-
-const getTopVerticalsRowLEDPattern = (digit, barLength) => {
-  switch (digit) {
-    case 0:
-    case 4:
-    case 8:
-    case 9:
-      return '|' + ' '.repeat(barLength) + '|'
-    case 1:
-    case 5:
-    case 6:
-      return '|' + ' '.repeat(barLength) + ' '
-    case 2:
-    case 3:
-    case 7:
-    default:
-      return ' ' + ' '.repeat(barLength) + '|'
-  }
-}
-
-const getMiddleLEDPattern2 = (digit, barLength) => {
-  switch (digit) {
-    case 0:
-      return '|' + ' '.repeat(barLength) + '|'
-    case 1:
-      return '|' + ' '.repeat(barLength) + ' '
-    case 2:
-    case 3:
-      return ' ' + '_'.repeat(barLength) + '|'
-    case 4:
-    case 8:
-    case 9:
-      return '|' + '_'.repeat(barLength) + '|'
-    case 5:
-    case 6:
-      return '|' + '_'.repeat(barLength) + ' '
-    case 7:
-    default:
-      return ' ' + ' '.repeat(barLength) + '|'
-  }
-}
-
-const getBottomVerticalsRowLEDPattern = (digit, barLength) => {
-  switch (digit) {
-    case 0:
-    case 6:
-    case 8:
-      return '|' + ' '.repeat(barLength) + '|'
-    case 1:
-    case 2:
-      return '|' + ' '.repeat(barLength) + ' '
-    case 3:
-    case 4:
-    case 5:
-    case 7:
-    case 9:
-    default:
-      return ' ' + ' '.repeat(barLength) + '|'
-  }
-}
-
-const getBottomLEDPattern2 = (digit, barLength) => {
-  switch (digit) {
-    case 0:
-    case 6:
-    case 8:
-      return '|' + '_'.repeat(barLength) + '|'
-    case 1:
-      return '|' + ' '.repeat(barLength) + ' '
-    case 2:
-      return '|' + '_'.repeat(barLength) + ' '
-    case 3:
-    case 5:
-    case 9:
-      return ' ' + '_'.repeat(barLength) + '|'
-    case 4:
-    case 7:
-    default:
-      return ' ' + ' '.repeat(barLength) + '|'
-  }
-}
-
-// writeLED2(1234567890, 3)
-writeLED2(parseInt(process.argv[2], 10), parseInt(process.argv[3], 10) || 1)
diff --git a/sample.ts b/sample.ts
deleted file mode 100644
index 4dacff4c2d8..00000000000
--- a/sample.ts
+++ /dev/null
@@ -1,237 +0,0 @@
-/**
- * # LED numerals exercise
- *
- * Write a command line program which takes a number and displays the “LED” version of
- * this number using underscores and vertical bars:
- *
- * $ led 757
- *  _   _  _
- *   | |_   |
- *   |  _|  |
- *
- * The first goal is just to get the above working. This likely will not take all of the
- * time. Use the stretch goals below to fill the time:
- *
- *     - Add a second parameter for bar length:
- *         $ led 757 2
- *          __   __  __
- *            | |      |
- *            | |__    |
- *            |    |   |
- *            |  __|   |
- *     - How do we test this for correctness? Write the tests.
- *     - How do we test this for performance? Write the tests.
- */
-
-export const writeLED = (led: number): void => {
-    let firstRow = ''
-    let secondRow = ''
-    let thirdRow = ''
-
-    // Split the LED number into digits
-    const digits = led.toString().split('')
-    // Get the LED pattern for each digit and build the rows with it
-    for (const digit of digits) {
-        firstRow += getTopLEDPattern(parseInt(digit, 10)) + ' '
-        secondRow += getMiddleLEDPattern(parseInt(digit, 10)) + ' '
-        thirdRow += getBottomLEDPattern(parseInt(digit, 10)) + ' '
-    }
-
-    console.log(`${firstRow}\n${secondRow}\n${thirdRow}`)
-}
-
-// TODO: Handle errors if digit > 9
-const getTopLEDPattern = (digit: number): string => {
-    switch (digit) {
-        case 0:
-        case 2:
-        case 3:
-        case 5:
-        case 6:
-        case 7:
-        case 8:
-        case 9:
-            return ' _ '
-        case 1:
-        case 4:
-        default:
-            return '   '
-    }
-}
-
-const getMiddleLEDPattern = (digit: number): string => {
-    switch (digit) {
-        case 0:
-            return '| |'
-        case 1:
-            return ' | '
-        case 2:
-        case 3:
-            return ' _|'
-        case 4:
-        case 8:
-        case 9:
-            return '|_|'
-        case 5:
-        case 6:
-            return '|_ '
-        case 7:
-        default:
-            return '  |'
-    }
-}
-
-const getBottomLEDPattern = (digit: number): string => {
-    switch (digit) {
-        case 0:
-        case 6:
-        case 8:
-            return '|_|'
-        case 1:
-            return ' | '
-        case 2:
-            return '|_ '
-        case 3:
-        case 5:
-        case 9:
-            return ' _|'
-        case 4:
-        case 7:
-        default:
-            return '  |'
-    }
-}
-
-// writeLED(1234567890)
-// writeLED(10000)
-
-const writeLED2 = (led: number, barLength = 1): void => {
-    let topRow = ''
-    let topVerticalsRow = ''
-    let middleRow = ''
-    let bottomVerticalsRow = ''
-    let bottomRow = ''
-
-    // Split the LED number into digits
-    const digits = led.toString().split('')
-    // Get the LED pattern for each digit and build the rows with it
-    for (const digit of digits) {
-        topRow += getTopLEDPattern2(parseInt(digit, 10), barLength) + ' '
-        topVerticalsRow += getTopVerticalsRowLEDPattern(parseInt(digit, 10), barLength) + ' '
-        middleRow += getMiddleLEDPattern2(parseInt(digit, 10), barLength) + ' '
-        bottomVerticalsRow += getBottomVerticalsRowLEDPattern(parseInt(digit, 10), barLength) + ' '
-        bottomRow += getBottomLEDPattern2(parseInt(digit, 10), barLength) + ' '
-    }
-
-    const topVerticals = new Array(barLength - 1).fill(topVerticalsRow).join('\n')
-    const bottomVerticals = new Array(barLength - 1).fill(bottomVerticalsRow).join('\n')
-
-    console.log(
-        `${topRow}\n${topVerticals}${barLength > 1 ? '\n' : ''}${middleRow}\n${bottomVerticals}${
-            barLength > 1 ? '\n' : ''
-        }${bottomRow}`
-    )
-}
-
-// TODO: Handle errors if digit > 9
-const getTopLEDPattern2 = (digit: number, barLength: number): string => {
-    switch (digit) {
-        case 0:
-        case 2:
-        case 3:
-        case 5:
-        case 6:
-        case 7:
-        case 8:
-        case 9:
-            return ' ' + '_'.repeat(barLength) + ' '
-        case 1:
-        case 4:
-        default:
-            return ' ' + ' '.repeat(barLength) + ' '
-    }
-}
-
-const getTopVerticalsRowLEDPattern = (digit: number, barLength: number): string => {
-    switch (digit) {
-        case 0:
-        case 4:
-        case 8:
-        case 9:
-            return '|' + ' '.repeat(barLength) + '|'
-        case 1:
-        case 5:
-        case 6:
-            return '|' + ' '.repeat(barLength) + ' '
-        case 2:
-        case 3:
-        case 7:
-        default:
-            return ' ' + ' '.repeat(barLength) + '|'
-    }
-}
-
-const getMiddleLEDPattern2 = (digit: number, barLength: number): string => {
-    switch (digit) {
-        case 0:
-            return '|' + ' '.repeat(barLength) + '|'
-        case 1:
-            return '|' + ' '.repeat(barLength) + ' '
-        case 2:
-        case 3:
-            return ' ' + '_'.repeat(barLength) + '|'
-        case 4:
-        case 8:
-        case 9:
-            return '|' + '_'.repeat(barLength) + '|'
-        case 5:
-        case 6:
-            return '|' + '_'.repeat(barLength) + ' '
-        case 7:
-        default:
-            return ' ' + ' '.repeat(barLength) + '|'
-    }
-}
-
-const getBottomVerticalsRowLEDPattern = (digit: number, barLength: number): string => {
-    switch (digit) {
-        case 0:
-        case 6:
-        case 8:
-            return '|' + ' '.repeat(barLength) + '|'
-        case 1:
-        case 2:
-            return '|' + ' '.repeat(barLength) + ' '
-        case 3:
-        case 4:
-        case 5:
-        case 7:
-        case 9:
-        default:
-            return ' ' + ' '.repeat(barLength) + '|'
-    }
-}
-
-const getBottomLEDPattern2 = (digit: number, barLength: number): string => {
-    switch (digit) {
-        case 0:
-        case 6:
-        case 8:
-            return '|' + '_'.repeat(barLength) + '|'
-        case 1:
-            return '|' + ' '.repeat(barLength) + ' '
-        case 2:
-            return '|' + '_'.repeat(barLength) + ' '
-        case 3:
-        case 5:
-        case 9:
-            return ' ' + '_'.repeat(barLength) + '|'
-        case 4:
-        case 7:
-        default:
-            return ' ' + ' '.repeat(barLength) + '|'
-    }
-}
-
-// writeLED2(1234567890, 3)
-writeLED2(parseInt(process.argv[2], 10), parseInt(process.argv[3], 10) || 1)