![]() N.Add('wishlist', nkArray) // adds an array nodeĪ particular feature of JSON is that it only allows one node of a given name at specific level. N.Add('verified', True) // adds a bool node N.Add('discount', -8.50) // adds a number node This internal formatting allows us to add strings with multiple lines or other format encoding, and internally they will be retained as JSON compatible strings.Īdd is overloaded allow you to add bool, number, string, and more: We can just use normal strings and they will be converted to JSON format internally. In our pascal code, if N is an array then the first parameter will be ignored as arrays in JSON do not have named values for their child nodes.Īlso notice when we use the Add method we do not need to use JSON strings. "note": "Customer requested we change the ship to address" This would add the following to our JSON object: N.Add('note', 'Customer requested we change the ship to address') If you want to add a value to an object (or an array) you can write: Nodes can be added or removed programatically using special purpose methods. The output of above snippet would have been: ![]() After temporarily switching nodes, to get a reference back to our root we could type:Īnd now we can be sure N refers to the root node again. If the shipTo/name was a string kind, it will switch to an object kind when a node is added. To switch to another node you might write: The JSON standard dictates that the root level of all JSON objects must either be an object or an array These three statements have the effect of converting the node kind and resetting its value.Īs noted in the last section, attempting to set the root node to a value that is not an object or an array is an error. A null node is null, an array node is array, and an object node is object. This is because the Value of each of these types is fixed. Note that AsNull, AsArray, and AsObject do not have an := assignment operator. If N is the root node, the first three statements will fail, as a root node is required to be either an object or array.Īlternately, the five statements below do the exact same thing as the five statements above, but with a bit of added type safety: In the examples above N is changed to a different kind of node with each statement. If any part of the path doesn't exist, it will be created for you. Force will search a path given, and return a node. The Force method allows users to add or modify a chain of objects, even if none exists. The most significant convenience is the addition of the Force method. This update fixes a problem with escaped double quotes "\"" and adds a few conveniences. A JSON builder allows you to dynamically create and manipulate nodes, then output those nodes as valid JSON text.Īn update to JsonTools has been posted to its github repository. A JSON parser converts plain text in Javascript object notation format into a set of nodes which can be queried. ![]() I decided to write a small yet capable JSON parser and builder. ![]()
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