Set difference
Set difference is the set of elements that belong to one set but not to another.
Build Python Web Apps with Streamlit
A delta is the difference between a metric's value in a main period and its value in a comparison period.
- How it is used
- Compares dashboard metrics across main and comparison date ranges to show change alongside the current value.
- How deep it goes
- Explains separate filtering, percentage calculation, formatting, and display, while stopping short of broader statistical interpretation.
- Examples
- Uses August and July sales, filtered dataframes, percentage formatting, and a metric bar as concrete examples.
- What you can do after
- Build it from scratch by calculating and formatting percentage deltas for Streamlit metric bars.
Read how Build Python Web Apps with Streamlit explains set difference →
Secrets of the JavaScript Ninja, Second Edition
The set of elements in one set that are not in another set.
- How it is used
- Filters a collection to retain elements absent from another set.
- How deep it goes
- Defines the operation and demonstrates it with JavaScript, without developing a formal treatment.
- Examples
- Demonstrates filtering ninjas to exclude those who are also samurai.
- What you can do after
- Apply set difference with JavaScript Set, spread, filter, and has.
Read how Secrets of the JavaScript Ninja, Second Edition explains set difference →
Related concepts
- setuses · A set is a collection of unique elements in which membership is determined by whether an element is present, not by duplicate occurrences.
- set intersectioncontrasts with · Set intersection is the set of elements that belong to every one of two or more sets.
- setdiffimplemented by · setdiff is a Julia function that returns the elements present in one collection but absent from one or more other collections.
- st.metricused by · st.metric is a Streamlit display function that presents a labeled metric value and optionally its change from a reference value.
- set operationkind of · A set operation combines, compares, or transforms sets according to the membership of their elements.
- disjalternative to · disj is a Clojure function that returns a set with one or more specified elements removed.
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