Build Faster Excel Workflows Using FILTER, IFS, XLOOKUP, and LET for Real-World Data

Learn the difference between Excel COUNT and COUNTA, plus TEXTBEFORE and TEXTAFTER tricks, so you clean text and totals with ...
Nature

Lectures on the Theory of Functions of Real Variables

THIS is emphatically a text-book, deductive in method and Euclidean in arrangement; as such, it has the defects of its qualities, but its merits are undeniable. In this volume the author deals with ...
Linux Journal

Tech Tip: Dereference Variable Names Inside Bash Functions

We often read (including in the book Advanced Bash-Scripting Guide by Mendel Cooper) that if we pass variable names as parameters to functions, they will be treated as string literals and cannot be ...
BBC

Local and global variables

Sub-programs, functions, procedures and methods make use of variables. Variables close variableA specific location in RAM (main memory) that stores a value used by a program can be declared as: A ...