JavaScriptBeginner
Destructuring Spread and RestCheatsheet
Unpack values with destructuring, then expand or gather them using the spread and rest operators.
Useful Cheatsheets
Practical cheat sheets for real life.
Direct, one-page reference guides to build software and AI systems, grow personal wealth, and optimize everyday health — designed for quick lookups and visual learners.
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JavaScriptIntermediate
JavaScript Error HandlingCheatsheet
Handle errors with try/catch and finally, throw and create custom Error types, and catch async errors.
JavaScriptAdvanced
JavaScript IteratorsCheatsheet
Understand iterables, the iteration protocol, generators, and async iteration with for await...of.
JavaScriptIntermediate
JavaScript Maps and SetsCheatsheet
Store unique values and keyed data with Set and Map, and hold weak references with WeakMap.
JavaScriptBeginner
JavaScript StringsCheatsheet
Slice, search, replace, split, and pad strings, and build them with template literal interpolation.
ReactIntermediate
Caching AI ResponsesCheatsheet
Skip repeat AI calls by caching answers by prompt and deduplicating requests already in flight.
ReactIntermediate
Canceling AI RequestsCheatsheet
Cancel in-flight AI requests with AbortController when the user navigates away or starts a new query.
ReactBeginner
Debouncing AI CallsCheatsheet
Wait for the user to stop typing before calling the AI, so you fire one request instead of dozens.
ReactIntermediate
Responsive AI Loading StatesCheatsheet
Keep the UI responsive during slow AI calls with optimistic updates, transitions, and clear status states.
ReactAdvanced
Handling AI Rate LimitsCheatsheet
Recover from AI rate limits by respecting Retry-After and retrying with exponential backoff and jitter.
ReactIntermediate
Calling AI From the ServerCheatsheet
Keep AI API keys off the client by calling the provider from a server route your React app fetches.
ReactIntermediate
Streaming AI ResponsesCheatsheet
Render AI output token by token as it streams in, so users see progress instead of a spinner.
BudgetingBeginner
The 50 30 20 RuleCheatsheet
Split take-home pay into 50% needs, 30% wants, and 20% savings for a simple, flexible budget.
BudgetingBeginner
Budgeting BasicsCheatsheet
Learn the core budgeting ideas: take-home pay, fixed and variable costs, and monthly cash flow.
BudgetingBeginner
Biweekly Paycheck BudgetingCheatsheet
Budget by paycheck instead of by month, split bills in half, and plan for extra-paycheck months.
BudgetingBeginner
Cutting Expenses and BillsCheatsheet
Free up real money by cutting subscriptions, negotiating bills, and lowering your three biggest costs.
BudgetingIntermediate
Debt Snowball vs AvalancheCheatsheet
Compare two proven payoff methods: avalanche saves the most interest, snowball builds the most motivation.
BudgetingBeginner
Building an Emergency FundCheatsheet
Build a cash cushion covering three to six months of essentials, kept safe and easy to reach.
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