https://github.com/p14n/lets-record

Capture values of a let form for analysis
https://github.com/p14n/lets-record

Last synced: 8 months ago
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Capture values of a let form for analysis

• Host: GitHub
• URL: https://github.com/p14n/lets-record
• Owner: p14n
• License: mit
• Created: 2020-04-10T14:04:10.000Z (about 6 years ago)
• Default Branch: master
• Last Pushed: 2021-10-29T09:45:39.000Z (over 4 years ago)
• Last Synced: 2025-10-21T22:58:15.548Z (8 months ago)
• Language: Clojure
• Size: 12.7 KB
• Stars: 1
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

          
# lets-record

Provides the letr form to record all symbol bindings in an atom.

[![Clojars Project](https://img.shields.io/clojars/v/lets-record.svg)](https://clojars.org/lets-record)

![CI](https://github.com/p14n/lets-record/workflows/CI/badge.svg)

## Why?

When performing complex calculations, if the result is not as expected it can be useful to see the interim "working out".  For example:

```clojure

(let [days (- end-days start-days)

      years (/ days 365)

      amount (* price quanity)

      period-rate (* rate years)

      interest (* period-rate amount)]

  interest) --> 0.5

```

If the amount of interest charged as incorrect, it would be useful to see what the other values were - is the number of days incorrect?  Or perhaps the amount?

Using the letr form:

```clojure

(def record (atom []))

(letr record 

     [days (- end-days start-days)

      years (/ days 365)

      amount (* price quanity)

      period-rate (* rate years)

      interest (* period-rate amount)]

  interest) --> 0.5

@record --> [{:days 365 :years 1 :amount 10 :period-rate 0.05 :interest 0.5}]

```

we can access a map of those values from the `record` atom.