LinQer is a library that sprang out of the need to fix two problems of Javascript's built-in iteration methods. It brings .NET's LINQ approach to databases to JavaScript. The problems with the iteration methods that needed fixing were mainly that: they are applicable to arrays only and that they are eager,meaning that the set undergoing intermittent transformations is the full one,even when only a few items are needed from it: "Every time you filter or you map something you create a new array". full article on i-programmer
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