GoByte Blog

Engineering lessons and marketing playbooks from the team behind GoByte.

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  • Generators: a function you can pause

    GoByte Skills #7: Calling a generator function runs none of its body. Each next() resumes a frozen frame up to the next yield, so a billion values cost one frame of memory. Plus the one pass trap that fails silently.

    PythonZoeOct 6, 20262 min read

  • Streams: nothing runs until the end

    GoByte Skills #6: filter and map do not filter or map anything. They write down a recipe, and no element moves until a terminal call drives the pipeline, pushing elements through one at a time. Bonus: why count() can skip your peek.

    JavaPiereOct 6, 20262 min read

  • Sealed types: the switch that cannot forget

    GoByte Skills #5: Seal the hierarchy, drop the default, and adding a type turns every switch that missed it into a compile error with a line number.

    JavaPiereOct 6, 20262 min read

  • Virtual threads: blocking is cheap again

    GoByte Skills #4: 10,000 tasks that each sleep 1 s finish in about 1.1 s on a 14 core laptop, in plain blocking Java. Virtual threads park and free the carrier. The catch on Java 21: synchronized pins it.

    JavaPiereOct 6, 20263 min read

  • Context: cancel the parent, the children hear it

    GoByte Skills #3: One cancel() at the root closes Done on every context below it, and closing a channel wakes every waiter at once. Context is a tree, not a kill switch. Also: why a dropped stop() leaks.

    GoPiereOct 6, 20263 min read

  • errors.Is: wrap it, keep the cause

    GoByte Skills #2: %v prints the exact same message and quietly drops the chain. %w keeps it, and errors.Is walks it link by link, so the cause survives every layer of context.

    GoPiereOct 6, 20262 min read

  • Go channels: the queue that says no

    GoByte Skills #1: A buffered channel is a bounded queue. When it is full, the send parks until there is room, so the slow consumer sets the pace. Backpressure in one argument to make(), plus the exact order a real run prints.

    GoPiereOct 6, 20263 min read

  • Vim from zero: a global command repeats one change

    :g runs a command on every line that matches. :g/^item /normal cwadd changes each order line that starts with item and a space. A note line stays.

    VimZoeSep 3, 20262 min read

  • Vim from zero: a register holds what you yanked

    A yank copies text into a register. "ayi" on item latte = "oat" copies oat. "ap puts that note at the cursor. The register is the clipboard you can name.

    VimZoeSep 3, 20262 min read

  • Shell from zero: read the exit code

    A command returns a number when it finishes. 0 means it worked. An empty drink name fails test -n. The program prints 1. Check the code before you trust the result.

    ShellZaraSep 3, 20262 min read

  • Shell from zero: local keeps the name inside

    local makes a variable private to the function. The function prints muffin. The script then prints latte. The caller's drink is unchanged.

    ShellZaraSep 3, 20262 min read

  • Motion from zero: the second step starts where the first ended

    Two steps share one object. The second step's fromX is the first step's x. The program prints 0 then 24, then 24 then 48.

    MotionArthurSep 3, 20262 min read