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javascript/snippets/truth-check-collection.md

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+---
+title: Truth check collection
+type: snippet
+tags: [object,logic,array]
+cover: digital-nomad-8
+dateModified: 2020-10-22T20:24:44+03:00
+---
+
+Checks if the predicate function is truthy for all elements of a collection.
+
+- Use `Array.prototype.every()` to check if each passed object has the specified property and if it returns a truthy value.
+
+```js
+const truthCheckCollection = (collection, pre) =>
+  collection.every(obj => obj[pre]);
+```
+
+```js
+truthCheckCollection(
+  [
+    { user: 'Tinky-Winky', sex: 'male' },
+    { user: 'Dipsy', sex: 'male' },
+  ],
+  'sex'
+); // true
+```