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June 7, 2019 03:47
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| const scope = {}; | |
| function def(id, fn) { | |
| scope[id] = fn; | |
| } | |
| function explode(id) { | |
| return scope[id] ? [id] : id.split('\u200d'); | |
| } | |
| function getFns(id) { | |
| return explode(id).map(function(ii) { | |
| if (!scope[ii]) | |
| throw new Error(`undefined is not a function 🤡. | |
| (But seriously, ${ii} isn't defined as a function in the scope.)`); | |
| return scope[ii]; | |
| }); | |
| } | |
| function compose(fns) { | |
| return arg => | |
| fns.reduceRight(function(prev, fn) { | |
| return fn(prev); | |
| }, arg); | |
| } | |
| function invoke(id, arg) { | |
| return compose([compose, getFns])(id)(arg); | |
| } | |
| def('👨', console.log); | |
| def('💻', arg => arg.toUpperCase()); | |
| invoke('👨💻', 'hello, world!'); | |
| //=> HELLO, WORLD! |
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| 📩 Example syntax: | |
| 👨 ⬅️ console.log | |
| 💻 ⬅️ toUpperCase | |
| "hello, world!" ➡️ 👨💻 | |
| 📩 Outputs: "HELLO, WORLD!" |
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