Merge branch 'master' of github-tsch-brown:browngraphicslab/Dash-Web into promises_and_user_document

1 files changed, 90 insertions, 0 deletions

diff --git a/src/client/northstar/utils/ArrayUtil.ts b/src/client/northstar/utils/ArrayUtil.ts
new file mode 100644
index 000000000..f35c98317
--- /dev/null
+++ b/src/client/northstar/utils/ArrayUtil.ts
@@ -0,0 +1,90 @@
+import { Exception } from "../model/idea/idea";
+
+export class ArrayUtil {
+
+    public static Contains(arr1: any[], arr2: any): boolean {
+        if (arr1.length === 0) {
+            return false;
+        }
+        let isComplex = typeof arr1[0] === "object";
+        for (let i = 0; i < arr1.length; i++) {
+            if (isComplex && "Equals" in arr1[i]) {
+                if (arr1[i].Equals(arr2)) {
+                    return true;
+                }
+            }
+            else {
+                if (arr1[i] === arr2) {
+                    return true;
+                }
+            }
+        }
+        return false;
+    }
+
+
+    public static RemoveMany(arr: any[], elements: Object[]) {
+        elements.forEach(e => ArrayUtil.Remove(arr, e));
+    }
+
+    public static AddMany(arr: any[], others: Object[]) {
+        arr.push(...others);
+    }
+
+    public static Clear(arr: any[]) {
+        arr.splice(0, arr.length);
+    }
+
+
+    public static Remove(arr: any[], other: Object) {
+        const index = ArrayUtil.IndexOfWithEqual(arr, other);
+        if (index === -1) {
+            return;
+        }
+        arr.splice(index, 1);
+    }
+
+
+    public static First<T>(arr: T[], predicate: (x: any) => boolean): T {
+        let filtered = arr.filter(predicate);
+        if (filtered.length > 0) {
+            return filtered[0];
+        }
+        throw new Exception()
+    }
+
+    public static FirstOrDefault<T>(arr: T[], predicate: (x: any) => boolean): T | undefined {
+        let filtered = arr.filter(predicate);
+        if (filtered.length > 0) {
+            return filtered[0];
+        }
+        return undefined;
+    }
+
+    public static Distinct(arr: any[]): any[] {
+        let ret = [];
+        for (let i = 0; i < arr.length; i++) {
+            if (!ArrayUtil.Contains(ret, arr[i])) {
+                ret.push(arr[i]);
+            }
+        }
+        return ret;
+    }
+
+    public static IndexOfWithEqual(arr: any[], other: any): number {
+        for (let i = 0; i < arr.length; i++) {
+            let isComplex = typeof arr[0] === "object";
+            if (isComplex && "Equals" in arr[i]) {
+                if (arr[i].Equals(other)) {
+                    return i;
+                }
+            }
+            else {
+                if (arr[i] === other) {
+                    return i;
+                }
+            }
+        }
+        return -1;
+    }
+}
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