diff --git a/.gitignore b/.gitignore
index e12ec5f..880318f 100644
--- a/.gitignore
+++ b/.gitignore
@@ -8,3 +8,4 @@ coverage
 *.lcov
 *.log
 *~
+.idea
\ No newline at end of file
diff --git a/source/base/misc.js b/source/base/misc.js
index 55636f7..5a3298f 100644
--- a/source/base/misc.js
+++ b/source/base/misc.js
@@ -37,7 +37,7 @@
  * multiply(10)(10); // => 100
  */
 export const partial = (f, ...as) => {
-  if (as.length === 0) { return f.call(); }
+  if (!as.length) { return f.call(); }
   const a = as.shift();
   if (a === undefined) { return f; }
   const p = f.bind(f, a);
diff --git a/source/list/building.js b/source/list/building.js
index 2d9db67..85690d5 100644
--- a/source/list/building.js
+++ b/source/list/building.js
@@ -39,7 +39,7 @@ import {error} from '../error';
  */
 export const scanl = (f, q, ls) => {
   const scanl_ = (f, q, ls) => {
-    if (isList(ls) === false) { return error.listError(ls, scanl); }
+    if (!isList(ls)) { return error.listError(ls, scanl); }
     if (isEmpty(ls)) { return cons(q)(emptyList); }
     const x = head(ls);
     const xs = tail(ls);
@@ -63,7 +63,7 @@ export const scanl = (f, q, ls) => {
  */
 export const scanr = (f, q0, as) => {
   const scanr_ = (f, q0, as) => {
-    if (isList(as) === false) { return error.listError(as, scanr); }
+    if (!isList(as)) { return error.listError(as, scanr); }
     if (isEmpty(as)) { return list(q0); }
     const x = head(as);
     const xs = tail(as);
diff --git a/source/list/func.js b/source/list/func.js
index a9073d0..2893432 100644
--- a/source/list/func.js
+++ b/source/list/func.js
@@ -172,8 +172,8 @@ export const listFilter = (start, end, filt) => {
  */
 export const listAppend = (xs, ys) => {
   const listAppend_ = (xs, ys) => {
-    if (isList(xs) === false ) { return error.listError(xs, listAppend); }
-    if (isList(ys) === false ) { return error.listError(ys, listAppend); }
+    if (!isList(xs)) { return error.listError(xs, listAppend); }
+    if (!isList(ys)) { return error.listError(ys, listAppend); }
     if (isEmpty(xs)) { return ys; }
     if (isEmpty(ys)) { return xs; }
     if (type(head(xs)) === type(head(ys))) { return cons(head(xs))(listAppend(tail(xs))(ys)); }
@@ -317,7 +317,7 @@ export const length = xs => {
  * @returns {boolean} `true` if the object is a `List` and `false` otherwise
  * @kind function
  */
-export const isList = a => a instanceof List ? true : false;
+export const isList = a => a instanceof List;
 
 /**
  * Check whether a `List` is empty. Returns `true` if the `List` is empty or false if it is
diff --git a/source/list/list.js b/source/list/list.js
index b744e17..336b17c 100644
--- a/source/list/list.js
+++ b/source/list/list.js
@@ -80,9 +80,9 @@ export class List extends Type {
   }
   // Ord
   static compare(as, bs) {
-    if (isEmpty(as) && isEmpty(bs)) { return EQ; }
-    if (isEmpty(as) && isEmpty(bs) === false) { return LT; }
-    if (isEmpty(as) === false && isEmpty(bs)) { return GT; }
+    if (isEmpty(as) && isEmpty(bs)) return EQ;
+    if (isEmpty(as) && !isEmpty(bs)) return LT;
+    if (!isEmpty(as) && isEmpty(bs)) return GT;
     if (compare(head(as), head(bs)) === EQ) { return compare(tail(as), tail(bs)); }
     return compare(head(as), head(bs));
   }
diff --git a/source/maybe/func.js b/source/maybe/func.js
index 1625406..74ff35c 100644
--- a/source/maybe/func.js
+++ b/source/maybe/func.js
@@ -44,7 +44,7 @@ export const Nothing = new Maybe();
  * @returns {Maybe} `Just a` or `Nothing`
  * @kind function
  */
-export const just = a => a === undefined || a === null || a !== a ? Nothing : new Maybe(a);
+export const just = a => a == undefined || a !== a ? Nothing : new Maybe(a);
 
 /**
  * Take a default value, a function, and a `Maybe` value. If the `Maybe` value is `Nothing`, return
@@ -76,7 +76,7 @@ export const maybe = (n, f, m) => {
  * @returns {boolean} `true` if the object is a `Maybe` and `false` otherwise
  * @kind function
  */
-export const isMaybe = a => a instanceof Maybe ? true : false;
+export const isMaybe = a => a instanceof Maybe;
 
 /**
  * Determine whether an object is a `Just`.
@@ -87,7 +87,7 @@ export const isMaybe = a => a instanceof Maybe ? true : false;
  */
 export const isJust = m => {
   if (isMaybe(m) === false) { return error.typeError(m, isJust); }
-  return isNothing(m) ? false : true;
+  return !isNothing(m);
 }
 
 /**
@@ -99,7 +99,7 @@ export const isJust = m => {
  */
 export const isNothing = m => {
   if (isMaybe(m) === false) { return error.typeError(m, isNothing); }
-  return m === Nothing ? true : false;
+  return m === Nothing;
 }
 
 /**
diff --git a/source/type.js b/source/type.js
index 4dca8d6..46fbd6b 100644
--- a/source/type.js
+++ b/source/type.js
@@ -143,8 +143,7 @@ export const typeCheck = (a, b) => {
     if (a instanceof Type && b instanceof Type) {
       return dataType(a).type(a) === dataType(b).type(b);
     }
-    if (dataType(a) === dataType(b)) { return true; }
-    return false;
-  }
+    return dataType(a) === dataType(b);
+  };
   return partial(typeCheck_, a, b);
-}
+};