Turns a string into a number if it's a valid number, returns undefined otherwise;
string
number
undefined
stringToNumberOrUndefined("618") === 618stringToNumberOrUndefined("3.14") === 3.14stringToNumberOrUndefined("SHREK") === undefined Copy
stringToNumberOrUndefined("618") === 618stringToNumberOrUndefined("3.14") === 3.14stringToNumberOrUndefined("SHREK") === undefined
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Turns a
stringinto anumberif it's a valid number, returnsundefinedotherwise;