add LimitedArray

ts/index.ts

@@ -6,3 +6,4 @@ export * from './lik.looptracker'
 export * from './lik.objectmap'
 export * from './lik.observablemap'
 export * from './lik.stringmap'
+export * from './lik.limitedarray'

ts/lik.limitedarray.ts

@@ -0,0 +1,43 @@
+import * as plugins from './lik.plugins'
+
+export class LimitedArray<T> {
+  array: T[] = []
+  arrayLimit: number
+  constructor(limitArg: number) {
+    this.arrayLimit = limitArg
+  }
+
+  addOne (objectArg: T) {
+    this.array.unshift(objectArg)
+    if (this.array.length > this.arrayLimit) {
+      this.array.length = this.arrayLimit
+    }
+  }
+
+  addMany (objectArrayArg: T[]) {
+    for (let objectArg of objectArrayArg) {
+      this.addOne(objectArg)
+    }
+  }
+
+  setLimit (limitArg: number) {
+    this.arrayLimit = limitArg
+    if (this.array.length > this.arrayLimit) {
+      this.array.length = this.arrayLimit
+    }
+  }
+
+  getAverage ():number {
+    if (typeof this.array[0] === 'number') {
+      let sum = 0
+      for (let localNumber of this.array) {
+        let localNumberAny: any = localNumber
+        sum = sum + localNumberAny
+      }
+      return sum / this.array.length
+    } else {
+      return null
+    }
+  }
+
+}

ts/lik.stringmap.ts

@@ -100,7 +100,7 @@ export class Stringmap {
     )
     this.notifyTrigger()
   }
-
+  
   /**
    * notifies triggers
    */