diff --git a/1437.check-if-all-1s-are-at-least-length-k-places-away.js b/1437.check-if-all-1s-are-at-least-length-k-places-away.js
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+++ b/1437.check-if-all-1s-are-at-least-length-k-places-away.js
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+/* URL of this problem
+ * https://leetcode.com/problems/check-if-all-1s-are-at-least-length-k-places-away/description/
+ *
+ * @param {number[]} nums
+ * @param {number} k
+ * @return {boolean}
+ */
+
+var kLengthApart = function(nums, k) {
+    const OneIdxes = [];
+    let IsKLenApart = true;
+
+    // Create an array of 1's indexes in nums in an order of occurrence 
+    nums.forEach((num, idx) => {
+        if (num === 1) {
+            OneIdxes.push(idx);
+        }
+    });
+    for (let i = 0; i < OneIdxes.length - 1 && IsKLenApart; i++) {
+        // Caluculate the distance between two of 1
+        const Distance = Math.abs(OneIdxes[i] - OneIdxes[i + 1]) - 1;
+
+        IsKLenApart = Distance >= k ? true : false;
+    }
+
+    return IsKLenApart;
+};
+
+module.exports = kLengthApart;
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diff --git a/kLengthApart.test.js b/kLengthApart.test.js
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+++ b/kLengthApart.test.js
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+const kLengthApart = require("./1437.check-if-all-1s-are-at-least-length-k-places-away");
+
+test("Return true if all 1's are at least k places away from each other", () => {
+    expect(kLengthApart([1,0,0,0,1,0,0,1], 2)).toBeTruthy();
+}); 
+
+test("Return false if any pair of 1's has less than k places in between", () => {
+    expect(kLengthApart([1,0,0,1,0,1], 2)).toBeFalsy();
+}); 
+
+test("Return true if the argument nums comprises only 1s and the argument k is 0", () => {
+    expect(kLengthApart([1,1,1,1,1], 0)).toBeTruthy();
+}); 
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