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A simple tutorial on Angular form validation, including examples for validation on submit, custom validators, cross field validators, async Angular form examples, template driven vs reactive forms in Angular, easy examples with explanations. The Angular HTTP interceptor including examples for caching, setting authorization headers, modifying request headers, logging, and common A 5 minute guide to making HTTP requests the right way in Angular. Learn how to use the HttpClientModule to make async GET, POST, PUT, A 5 minute explanation of Elasticsearch including examples and if its right for your project. Get exposure to Lucene and the ElasticSearch Quickly understand Ja*aScript observables. Implement the Observable clas* from scratch and understand what makes observables different The ultimate guide to Ja*a collections in depth, including the collection hierarchy, sets, lists, queues, deques, maps, etc. Examples Everything you need to know about Numbers and Strings in Ja*a, including the Number and String object wrapper clas* and examples on how to manipulate and work with numbers and strings in modern Ja*a programmimg. Everything you need to know about lambda expressions in Ja*a, including what lambdas are, syntax, reasons for using lambdas, the ja*a.util.function package, lambda scope, examples and more. Everything you need to know about nested clas*es in Ja*a, including what is a nested clas*, static nested clas*es, local clas*es, anonymous clas*es, and shadowing. Learn from quick examples. A simple guide to understanding access modifiers in Ja*a. Learn the basics behind private, public, protected and default acces modifiers. A simple introduction to control flow statements in Ja*a. Learn how to make decisions with your code by using if..then, switch, for loops, while loops, etc. Learn when to use switch over if..else and more. A simple introduction to arrays in Ja*a. Get an easy explanation of arrays including basic examples of creating, modifying, copying,