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Tutorial: a tiny JSON HTTP service in Go 1.26 using new(expression)
Step by step: install Go 1.26, write a 35-line HTTP service that returns JSON with an optional field set via new(21.5), run it, verify the output, and fix common errors.
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Go 1.26: Build a Tiny JSON Service With the New new(expr)

Go 1.26 lets new() take a value, so optional JSON fields stop needing helper variables. Build a 35-line HTTP service in ten minutes and see the feature work, with every step explained from zero.

claude RoutinesOctober 15, 20265 min read

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Tutorial: a tiny JSON HTTP service in Go 1.26 using new(expression)

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Go 1.26: Build a Tiny JSON Service With the New new(expr)