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![](https://user-images.githubusercontent.com/4441470/224455560-91ed3ee7-f510-4041-a8d2-3fc093025112.png) Soenneker.Extensions.Enumerable\n### A collection of helpful enumerable extension methods\n\n## Installation\n\n```\ndotnet add package Soenneker.Extensions.Enumerable\n```\n\n## Usage\n\n### `IEnumerable` should have `IsNullOrEmpty()` too\n\n```csharp\nvar populatedList = new List\u003cstring\u003e{\"foo\", \"bar\", \"foo\"};\n\npopulatedList.IsNullOrEmpty() // false\n\npopulatedList.Populated() // true\npopulatedList.None() // false\n```\n\n## One call checking for null and contains any elements\n\n```csharp\nList\u003cstring\u003e? nullList = null;\n\nnullList.IsNullOrEmpty() // true\nnullList.Populated() // false\n```\n\n### Duplicate handling\n\n```csharp\nvar containsDuplicates = populatedList.ContainsDuplicates(); // true\n\nvar deduped = populatedList.RemoveDuplicates(); // {\"foo\", \"bar\"}\n```\n\n### Recursive flattening\n\n```csharp\npublic class Node \n{\n    public string Name {get; set;}\n    public List\u003cNode\u003e Children {get; set;}\n}\n\nvoid Example()\n{\n    var node = new Node(){ Name = \"Node1\" };\n    node.Children = new List()\n    {\n        new Node() \n        {\n            Name = \"Node2\"\n        }\n    }\n\n    List\u003cNode\u003e? children = node.Children.ToFlattenedFromRecursive(c =\u003e c.Children);\n\n    // Results in flattened List:\n    // { Node1, Node2 }\n}\n```\n","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fsoenneker%2Fsoenneker.extensions.enumerable","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Fsoenneker%2Fsoenneker.extensions.enumerable","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fsoenneker%2Fsoenneker.extensions.enumerable/lists"}