Eric Yancey Dauenhauer ericyd
ericyd
/ async-validation-with-generators.js
Created
November 3, 2023 15:07
Async Validation with Generators
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| /** | |
| * Running multiple validations asynchronously can present some interesting challenges, | |
| * especially if the calling function should return a "result" type (or some other non-throwing value). | |
| * There is even more complexity if you want to run the validations in sequence, | |
| * and stop on the first failure. | |
| * | |
| * It is fairly easy to construct a meta function that executes the validators imperatively, | |
| * but what if you want a more generic approach? | |
| * This gist suggests a generic solution using generators, and slowly builds up the intuition | |
| * until the final example shows a more realistic use case. |
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| /** | |
| * Hosted at: https://gist.github.com/ericyd/c36ff66a40c3b7ede7ac9dd95ae260af | |
| * Usage: | |
| * cd my-local-git-repo | |
| * curl https://gist.githubusercontent.com/ericyd/c36ff66a40c3b7ede7ac9dd95ae260af/raw/git-stats.js > git-stats.js | |
| * node git-stats.js | |
| */ | |
| const { exec } = require('child_process') | |
| const { promisify } = require('util') |
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| User Registration | |
| User enters phone number -> Send authentication SMS | |
| Send authentication SMS | |
| User taps authentication link -> Prove checks mobile identity | |
| Prove checks mobile identity | |
| User is valid -> Registration complete | |
| User is invalid -> Error message | |
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| // Cargo.toml | |
| // =============== | |
| // [package] | |
| // name = "flow-field-1" | |
| // version = "0.1.0" | |
| // authors = ["ericyd <eric@ericyd.com>"] | |
| // | |
| // [dependencies] | |
| // nannou = "0.13" | |
| // |
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| /** | |
| * This is NOT a cryptographically strong UUID algorithm | |
| * It is purely for quick-n-easy drag-n-drop scripting applications where | |
| * data quality does not matter. | |
| * | |
| * For a proper UUID implementation, see | |
| * https://github.com/uuidjs/uuid/blob/master/src/v4.js | |
| */ | |
| const max = Math.pow(2, 8) - 1 | |
| // this slick trick thanks to https://github.com/uuidjs/uuid/blob/e8cb0a03a5408415d1f93a1499d8cda47246adc7/src/bytesToUuid.js#L7 |
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| /* | |
| Basically, an experiment right now | |
| */ | |
| bool const DEBUG_NEXT_VALUE = false; | |
| bool const DEBUG_CALCULATE_NEXT_VALUES = false; | |
| struct RGB | |
| { | |
| double r; |
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| Smart Deposits | |
| First paycheck for employer -> Intro Carousel step 1 | |
| Subsequent paychecks for employer -> Receipt View | |
| First Time experience | |
| Intro Carousel step 1 | |
| Swipe to step 2 -> Intro Carousel step 2 | |
| Continue -> Edit View |
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| #!/bin/zsh --login | |
| LOG_FILE="$(pwd)/qa-setup-$(date +%Y-%m-%d_%H.%M.%S%Z).log" | |
| ############################# | |
| # | |
| # Utilities and setup | |
| # | |
| ############################# | |
| warnings="\n\nResources / References\n======================\n\n" |
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| ///////////////////////// | |
| // | |
| // Examples | |
| // | |
| // Live examples: | |
| // https://observablehq.com/@ericyd/rgb-factory | |
| // | |
| ///////////////////////// | |
| console.log(rgbFactory()(0)); // { r: 212, g: 90.00000000000004, b: 90 } |
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| /* | |
| It is common to address two-dimensional array problems with nested arrays. | |
| It works, but then you have all these nasty references like array[0][3]. | |
| This class abstracts the element selection to a method which takes the x and y indices | |
| as arguments. | |
| If you wanted to go purely functional obviously you can, but this class demonstrates the idea. | |
| */ | |
| class TwoDimensionalArray { |
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