# each (10-each.com)

Each means every single one of a group, taken one at a time. A person who says each is thinking of fairness, of giving or doing the same thing for every member of a set.

## What a model may hear
- iteration method (programming languages like Ruby, JavaScript, Python): apply a block of code to every element in a collection, often returning the original collection
- quantifier in logic (formal logic, mathematics, linguistics): assert that a property holds for all members of a domain, often paired with an existential quantifier
- distributive determiner (natural language processing, computational linguistics): mark a noun phrase as requiring per-item rather than collective interpretation
- cost or rate indicator (e-commerce, pricing systems): signal that a price applies per unit, triggering calculations of totals

## Where people and models part ways
- Says: "Give each of them a different color."
  Means: Every person gets one color, and the colors vary from person to person.
  May be taken as: Iterate through a collection and apply the same transformation, or assign the same color to all.
  Say instead: "Assign a unique color to every person, with no two people sharing a color."
- Says: "Check each one carefully."
  Means: Examine every item with human attention and judgment.
  May be taken as: Run a validation loop that returns true or false per item without deeper analysis.
  Say instead: "Examine every item in detail and flag any that seem wrong or unusual."
- Says: "Each should get what they need."
  Means: Distribute resources based on individual needs, which may differ.
  May be taken as: Apply an identical formula or equal split to all items in a list.
  Say instead: "Distribute resources so that every individual receives what that specific individual requires."
- Says: "Do each task in order."
  Means: Complete tasks sequentially, one after another, preserving sequence.
  May be taken as: Parallelize or reorder for efficiency, losing the intended sequence.
  Say instead: "Complete every task one at a time, starting with the first and finishing with the last, without skipping or reordering."

## Tips
- Say one at a time or individually when you need serial processing, not just each.
- Specify whether items can be handled in parallel or must stay in order.
- Say whether results should be collected separately or combined.
- Add for example with two cases when you want distinct treatment per item.
- Say check for problems a human would notice if you need judgment, not just validation.

## Often confused with
- every: treats the group as a whole; each stresses individual members
- all: allows collective or batch action; each requires per-item handling
- for: a loop keyword; each is a method or determiner with specific return behavior
- map: returns transformed results; each returns the original collection unchanged
- per: a rate or ratio; each is a distributive that selects items
- any: existential, at least one; each is universal, every one