update: better parallel

src/parallel.js

@@ -1,15 +1,17 @@
 // Параллельные вычисления
 
-const WAIT_CHECK_TIME = 10;
-
 function parallel(promises, callback) {
     const result = [];
-    
+
     let done = 0;
     const setResult = (i, res) => {
         done++;
         result[i] = res;
+        if (done === promises.length) {
+            callback(result);
+        }
     }
+
     for (let i in promises) {
         const promise = promises[i];
         const res = promise((res) => setResult(i, res));
@@ -17,20 +19,6 @@ function parallel(promises, callback) {
             setResult(i, res);
         }
     }
-    
-    // if all sync
-    if (done === promises.length) {
-        callback(result);
-        return;
-    }
-    
-    // if at least one is async
-    const waitInterval = setInterval(() => {
-        if (done === promises.length) {
-            clearInterval(waitInterval);
-            callback(result);   
-        }
-    }, WAIT_CHECK_TIME);
 }
 
 parallel([