The standard tools are great, and I love them - It's not a tool for replacing them. The example above is the simplest one so people would get the concept (I would use wc -l in that case as well). However, once you need more complex stuff (such as the total-size-per-date example), the standard tools are not enough, not to mention expressions on numeric data, limits, sorting by expression, etc. I kindly offer you to read the complete README in the link, maybe it'll change your mind. Thanks.
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The standard tools are great, and I love them - It's not a tool for replacing them. The example above is the simplest one so people would get the concept (I would use wc -l in that case as well). However, once you need more complex stuff (such as the total-size-per-date example), the standard tools are not enough, not to mention expressions on numeric data, limits, sorting by expression, etc. I kindly offer you to read the complete README in the link, maybe it'll change your mind. Thanks.