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Every week, I’ll send you one pattern to recognize, one problem worth solving, and the mistake I see candidates make most. Short enough to use. Specific enough to matter.
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PATTERN / SLIDING WINDOW
This week’s signal: a contiguous range plus a constraint you can maintain. The trap is moving both pointers without stating the invariant.
Before you code, finish this sentence: “My window is valid while…”
What arrives
No content treadmill. Each issue is a small coaching note built around a rep you can actually finish.
The clue in the prompt that tells you what technique to consider.
One carefully chosen problem—not a 30-link dump.
The shortcut, blind spot, or interview habit worth fixing this week.
A realistic move for the week, even if you only have a few hours.
A note from Ryan
The site gives you the full curriculum. The newsletter gives you a reason to come back. I write it like a coaching note: one idea, one rep, one correction.
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