For example I have class:
Serialize an object including it's function into a JSON. - luin/serialize. I'm using serialize with a savepoint, but intermittently the callback is returning but none of my serialized queries have run yet and I see my code calling close on the database before they run. This is a big problem since i'm trying.
I want to save object test in database.How to serialize object test to string? (methods, variables, etc)
Max6 Answers
In this case, for the question you're asking, there really isn't a way to do what you want. The problem with your request lies in 'serializing everything attached to the object, including functions'.
Serialization normally only occurs for data, because executables are usually machine bound, in that they are compiled for a given machine, based on certain characteristics. Now, it's reasonable to say that javascript functions just require a javascript interpreter, because javascript is write-once, run-everywhere. But when people write serializers, because all serializers tend to work the same, we write them for data only. In this case, the industry standard is JSON, which is an object-data only serializer.
There are three solutions that avail themselves to you at this point: Mecanica de fluidos cengel cimbala pdf printer.
- Write your own serialier/deserializer that encapsulates functions. This can be tricky, because not all javascript engines will give you access to the source.
- Write your own re-loading mechanism that generates a specific new initialized type on each restore, and save the typename as one of the properties on serialization. That way the initialization of each variable gives you the methods, and then merging with the data gives you the complete object.
- Store each function as a string and eval it on the fly as you need it. This is incredibly tricky, and is quite prone to errors. I can think of no case where this becomes helpful, because it's quite fragile. However, it is an option, and cannot be overlooked.
I know that 3 is a sub-answer for 1, so you can consider it that there are only two useful answers.
I know that superficially this works on Chrome and IE9, so it should work everywhere the majority of users are likely to use it:
So you can certainly serialize the methods as strings in place of the actual method, but you're going to need to create a duplicate object so you can capture every element on the source object (I think, rather than replacing them in place).
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Hopefully this helps you think about the problem some more, and maybe to realize you don't need to serialize the methods (nobody ever does that I know of, not reasonably).
jcolebrand
jcolebrandThe best way to do this is to write your own serialize method which creates a JSON object with attributes, based on your getters. Normally you define a getter per attribute. So it should work for most cases (so you don't have to define a serialize method for each class).
To reset your attribute values back to the class you have two options:
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- Create a function in your class which creates a valid object instance based on the serialized JSON.
- Create a unserialize method and map the JSON with your class using the setters.
Example:
Typically, you'd do this with JSON, which is widely supported across browsers/languages/libraries/etc. Cooking dash 2017 download. The only hangup is that JSON does not support functions – but do you really need to serialize those?
Matt BallMatt BallI've had to support functionality similar to this before. I ended up saving the name of the function as a string and serializing it as JSON. Then when I come back to the client, I execute the function using a helper like the one posted in this question.
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Inxs deckadance flac. If anyone has a better way to solve this problem, I'd want to see it!
I recently had to find a solution for this problem. I'm sure it can be improved upon.
First I created a module for instantiating the 'serialisable' object.
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you of course have to consider error handling and other validations.
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i am trying to create an JSON object in Node js without any success.for example to create an object like:
but in a dynamic way without any knowledge about the size of every item.is there something like that for Node js.thank you very much
daniel the mandaniel the manclosed as off-topic by Quentin, Reeno, serenesat, Sheepy, Alex AndreiDec 21 '15 at 7:54
This question appears to be off-topic. The users who voted to close gave this specific reason:
- 'Questions seeking debugging help ('why isn't this code working?') must include the desired behavior, a specific problem or error and the shortest code necessary to reproduce it in the question itself. Questions without a clear problem statement are not useful to other readers. See: How to create a Minimal, Reproducible Example.' – Quentin, Reeno, serenesat, Alex Andrei
3 Answers
Node Js Php Serialize Object To Json
What I believe you're looking for is a way to work with arrays as object values:
Install multiple software at once offline printer. This is standard JavaScript and not something NodeJS specific. In order to serialize it to a JSON string you can use the native JSON.stringify:
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The JavaScript Object() constructor makes an Object that you can assign members to.
The other answers are helpful, but the JSON in your question isn't valid. I have formatted it to make it clearer below, note the missing single quote on line 24.
Php Serialize Array
There are a lot of great articles on how to manipulate objects in Javascript (whether using Node JS or a browser). I suggest here is a good place to start:https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Working_with_Objects
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