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It may not replace the widely accepted/used answer but if this is more of what you are expecting as results from your is Numeric function then hopefully this will be of some help. Because it has attracted low-quality or spam answers that had to be removed, posting an answer now requires 10 reputation on this site (the association bonus does not count).EDIT: As pointed out by Bergi, there are other possible objects that could be considered numeric and it would be better to whitelist than blacklist. I want my is Numeric function to consider only Numbers or Strings With this in mind, it would be better to use // IS NUMERIC document.write(! Would you like to answer one of these unanswered questions instead?It's so easy to make subtle, impossible to spot mistakes with your regular expression.If you can't use expression forces Java Script to do type coercion on your input value; it must first be interpreted as a number for the subtraction operation.To apply the options to every document of your schema by default, set your schemas is turned off.This function is called automatically, so you don't need to call it.
This method accepts the same options as Document#to Object.
To force execution without a callback, we must first call update() and then execute it by using the var q = Model.where(); q.update().update(); // not executed q.update().exec(); // executed // keys that are not $atomic ops become $set.
// this executes the same command as the previous example.
The option set, the update operation will be ignored and the callback executed without sending the command to Mongo DB so as to prevent accidently overwritting documents in the collection.
The operation is only executed when a callback is passed.