Bitwise in Node.js

And.js

module.exports = (value1, value2) => {
  let a = value1.toString().split("");
  let b = value2.toString().split("");

  let new_value = [];

  for (i = 0; i < a.length; i++) {
    let apos = a[i];
    let bpos = b[i];

    if (apos == "1") {
      if (apos == bpos) {
        new_value.push("1");
      }  else {
        new_value.push("0");
      }
    } else {
      new_value.push("0");
    }
  }

  return new_value.join("");
}

LeftShift.js

module.exports = (value1, value2) => {
  var a = value1.toString().split("");
  var b = parseInt(value2);

  var new_value = [];

  for (var i = 0; i < a.length; i++) {
    new_value.push("0");
  }

  for (var i = 0; i < a.length; i++) {
    if (a[i - b]) {
      new_value[i - b] = a[i];
    }
  }

  return new_value.join("");
}

Or.js

module.exports = (value1, value2) => {
  let a = value1.toString().split("");
  let b = value2.toString().split("");

  let new_value = [];

  for (i = 0; i < a.length; i++) {
    let apos = a[i];
    let bpos = b[i];

    if (apos == "1" || bpos == "1") {
      new_value.push("1");
    } else {
      new_value.push("0");
    }
  }

  return new_value.join("");
}

RightShiftSigned.js

module.exports = (value1, value2) => {
  var a = value1.toString().split("");
  var b = parseInt(value2);

  var new_value = [];

  for (var i = 0; i < a.length; i++) {
    if (a[0] == "1" && i < b) {
      new_value.push("1");
    } else {
      new_value.push("0");
    }

  }

  for (var i = 0; i < a.length; i++) {
    if (a[i + b]) {
      new_value[i + b] = a[i];
    }
  }

  return new_value.join("");
}

RightShiftZero.js

module.exports = (value1, value2) => {
  var a = value1.toString().split("");
  var b = parseInt(value2);

  var new_value = [];

  for (var i = 0; i < a.length; i++) {
    new_value.push("0");
  }

  for (var i = 0; i < a.length; i++) {
    if (a[i + b]) {
      new_value[i + b] = a[i];
    }
  }

  return new_value.join("");
}

Xor.js

module.exports = (value1, value2) => {
  let a = value1.toString().split("");
  let b = value2.toString().split("");

  let new_value = [];

  for (i = 0; i < a.length; i++) {
    let apos = a[i];
    let bpos = b[i];

    if (apos == "1" && bpos == "0") {
      new_value.push("1");
    } else if (apos == "0" && bpos == "1") {
      new_value.push("1");
    } else {
      new_value.push("0");
    }
  }

  return new_value.join("");
}