Excel regex functions: REGEXTEST, REGEXEXTRACT, REGEXREPLACE
Excel regex functions REGEXTEST, REGEXEXTRACT, and REGEXREPLACE finally bring PCRE2 patterns to Microsoft 365. Learn the syntax, use cases, and traps.
Excel XMATCH function: two-dimensional lookup guide
Use INDEX with two XMATCH calls to look up by row and column simultaneously. See header traps, structured refs, and older-Excel fallbacks inside.
Excel FILTER function with multiple criteria: AND, OR, mixed
Excel FILTER function with multiple criteria — use * for AND, + for OR, and combine them cleanly. Handle #CALC!, chain SORT and UNIQUE. Read on.
Excel SWITCH function: replace nested IF the clean way
Excel SWITCH function replaces messy nested IF formulas with a clean value-result mapping. Walk through the migration and when to use IFS instead.
Excel TEXTBEFORE and TEXTAFTER: extract text cleanly
Extract text before or after any delimiter in Excel using TEXTBEFORE and TEXTAFTER — plus safe patterns for emails, URLs, and messy log data.
Google Sheets IFERROR: clean up lookup errors safely
Google Sheets IFERROR wraps a formula and swaps errors for a fallback — but it hides real bugs. Learn when to use IFERROR vs IFNA, and when not to.
VSTACK and HSTACK in Excel: combine ranges cleanly
VSTACK and HSTACK combine ranges in Excel without copy-paste. See how to consolidate sheets, dodge #N/A padding, and chain UNIQUE — read on.
Google Sheets SPARKLINE: inline mini charts done right
Master Google Sheets SPARKLINE to build inline mini charts inside a single cell. Options by chart type, common errors, and when to switch to a full chart.
Excel LAMBDA: build reusable functions without VBA
Excel LAMBDA turns a duplicated formula into a named function you can call from anywhere. Learn the syntax, the traps, and how to save one — read on.
Fix the Excel #SPILL! error: 6 dynamic array causes
Excel #SPILL! error in a dynamic array formula? Here are the six causes and the exact fix for each, from blocked cells to full-column lookups.
Excel GROUPBY function: a pivot table alternative
Excel GROUPBY turns a pivot table into a single formula that updates with the source. See when to use it, the eight arguments, and common errors.
Excel Goal Seek: solve any formula backward in seconds
Excel Goal Seek reverse-solves any formula so a target value matches what you want. Step-by-step setup, common errors, and the PMT trap. Read on.