DataFrame.prototype.replace = function (oldValue, newValue, options) {
var _this = this;
var _a = __assign({ inplace: false }, options), columns = _a.columns, inplace = _a.inplace;
if (!oldValue && typeof oldValue !== 'boolean') {
throw Error("Params Error: Must specify param 'oldValue' to replace");
}
if (!newValue && typeof newValue !== 'boolean') {
throw Error("Params Error: Must specify param 'newValue' to replace with");
} <--- this is true for newValue = 0..

I do not see why this is intentional given that the nature of the error is that I specify a newValue to replace an old value. And thats what I was intending to do, to replace values to 0.