René's URL Explorer Experiment

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        "name": "HelloKoding - Practical Coding Guides, Tutorials and Examples Series",
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    "author": {
        "@type": "Person",
        "name": "Van N.",
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    "headline": "Java TreeSet Tutorial with Examples",
    "url": "http://hellokoding.com/java-treeset-tutorial-with-examples/",
    "datePublished": "2019-10-08T15:09:30.000Z",
    "dateModified": "2020-03-17T14:58:44.000Z",
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    "keywords": "Java",
    "description": "TreeSet is a red-black tree data structure implementation of the NavigableSet interface. TreeSet is a part of the Java Collections Framework and has the following features Provides value-ordered iteration Provides contains(Object), add(Object) and remove(Object) operations in log-time performance Duplicated elements are ignored. A null element is not"
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