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QUESTDB_website/static/js/numberUtils.js

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class stringNumber{
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constructor(value,printNaN=true) {
this.string=value
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this.printNaN=printNaN
}
valueOf() {
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return parseFloat(this.string)
}
toString(){
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if (checkNumber(this.string) && this.printNaN) {
return this.string
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} else {
return NaN.toString()
}
}
}
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function checkNumber(string) {
try {
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return !Number.isNaN(parseFloat(string))
} catch (error) {
return false
}
}