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heartforit/gist:1bda829c1b12bb2dcdecd02fd8ecc071

Created October 16, 2022 14:08
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Check for arrow function / lambda in javascript
Raw
gistfile1.txt
function isLambda(func){
if(typeof func !== "function") throw new Error("invalid function was provided")
let firstLine = func.toString()
.split("\n")['0']
.replace(/\n|\r|\s/ig, "")
return (!firstLine.includes("function") && (firstLine.includes(")=>{") || firstLine.includes("){")))
}
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