I am very new to VBA and I can not figure out how to get values from a Collection.
This is my code:
Dim p As Object
Set p = JSON.parse(Response.Content)
Dim links As Object
Set links = p.Item("links")
In the debugger for "links" I see:
I am using this library to parse json : http://www.ediy.co.nz/vbjson-json-parser-library-in-vb6-xidc55680.html
The part I have in json is:
"links":[
{
"rel":"next",
"href":"www.google.com"
}
]
How can I get the value of "rel" here?
Don't forget the bang operator, designed for collection access by key:
links(1)!rel
or:
links(1)![rel] 'When there are spaces or reserved words.
I will answer my own question:
links(1).Item("rel")
worked...
Regards..
Using JavaScript features of parsing JSON, on top of ScriptControl, we can create a parser in VBA which will list each and every data point inside the JSON. No matter how nested or complex the data structure is, as long as we provide a valid JSON, this parser will return a complete tree structure.
JavaScript’s Eval, getKeys and getProperty methods provide building blocks for validating and reading JSON.
Coupled with a recursive function in VBA we can iterate through all the keys (up to nth level) in a JSON string. Then using a Tree control (used in this article) or a dictionary or even on a simple worksheet, we can arrange the JSON data as required.
You can see the full VBA code here
Related
I have a project I'm working on that implements MySQL, React and Express.js. I need to save an array into MySQL, but there are currently no ways to save an array, as far as I could see, so I was forced to convert it into a string. When I get it back from Express to the client, it's obviously a string, so I can't access the data. This array is used for a graph, mainly. What are some of the ways I can convert this string back to an array?
You can use JSON.parse() to convert a string into an array.
const response = "[1,2,3]";
console.log(JSON.parse(response));
You can store your json object (including arrays )in form of text in mysql database.What you have to do is JSON.stringify("your array") and persist it in database.And while you are retrieving it back from database you can JSON.parse() to get it in form of JavaScript object
Depends on how you formed the string. If you used , for joining the elements, then you can use javascript's string.split() method.
let str = '1,2,3,4';
let arr = str.split(',');
Just pass in whatever delimiter you used to join the elements.
OR
If you're saving elements as a json string, then use JSON.parse(str) as shown by Nils Kähler in his answer
I'm working with Scala in IntelliJ IDEA 15 and trying to parse a large twitter record json file and count the total number of hashtags. I am very new to Scala and the idea of functional programming. Each line in the json file is a json object (representing a tweet). Each line in the file starts like so:
{"in_reply_to_status_id":null,"text":"To my followers sorry..
{"in_reply_to_status_id":null,"text":"#victory","in_reply_to_screen_name"..
{"in_reply_to_status_id":null,"text":"I'm so full I can't move"..
I am most interested in a property called "entities" which contains a property called "hastags" with a list of hashtags. Here is an example:
"entities":{"hashtags":[{"text":"thewayiseeit","indices":[0,13]}],"user_mentions":[],"urls":[]},
I've browsed the various scala frameworks for parsing json and have decided to use json4s. I have the following code in my Scala script.
import org.json4s.native.JsonMethods._
var json: String = ""
for (line <- io.Source.fromFile("twitter38.json").getLines) json += line
val data = parse(json)
My logic here is that I am trying to read each line from twitter38.json into a string and then parse the entire string with parse(). The parse function is throwing an error claiming:
"Type mismatch, expected: Nothing, found:String."
I have seen examples that use parse() on strings that hold json objects such as
val jsontest =
"""{
|"name" : "bob",
|"age" : "50",
|"gender" : "male"
|}
""".stripMargin
val data = parse(jsontest)
but I have received the same error. I am coming from an object oriented programming background, is there something fundamentally wrong with the way I am approaching this problem?
You have most likely incorrectly imported dependencies to your Intellij project or modules into your file. Make sure you have the following lines imported:
import org.json4s.native.JsonMethods._
Even if you correctly import this module, parse(String: json) will not work for you, because you have incorrectly formed a json. Your json String will look like this:
"""{"in_reply_...":"someValue1"}{"in_reply_...":"someValues2"}"""
but should look as follows to be a valid json that can be parsed:
"""{{"in_reply_...":"someValue1"},{"in_reply_...":"someValues2"}}"""
i.e. you need starting and ending brackets for the json, and a comma between each line of tweets. Please read the json4s documenation for more information.
Although being almost 6 years old, I think this question deserves another try.
JSON format has a few misunderstandings in people's minds, especially how they are stored and how they are read back.
JSON documents, are stored as either a single object having all the other fields, or an array of multiple object possibly in same format. this second part is important because arrays in almost every programming language are defined by angle brackets and values separated by commas (note here I used a person object as my single value):
[
{"name":"John","surname":"Doe"},
{"name":"Jane","surname":"Doe"}
]
also note that everything except brackets, numbers and booleans are enclosed in quotes when written into file.
however, there is another use that is not official but preferred to transfer datasets easily where every object, or document as in nosql/mongo language, are stored in a new line like this:
{"name":"John","surname":"Doe"}
{"name":"Jane","surname":"Doe"}
so for the question, OP has a document written in this second form, but tries an algorithm written to read the first form. following code has few simple changes to achieve this, and the user must read the file knowing that:
var json: String = "["
for (line <- io.Source.fromFile("twitter38.json").getLines) json += line + ","
json=json.splitAt(json.length()-1)._1
json+= "]"
val data = parse(json)
PS: although #sbrannon, has the correct idea, the example he/she gave has mistakenly curly braces instead of angle brackets to surround the data.
EDIT: I have added json=json.splitAt(json.length()-1)._1 because the code above ends with a trailing comma which will cause parse error per the JSON format definition.
I am currently using a list of PropertyDTO s in my scala.html file to populate a view with Play2. The propertyDTO has a String attribute "value" which contains a JSON String. I want to convert this string to a JSON object in the scala.html file, and iterate through the JSON object collection. When trying the following,
val json = Json.parse(property.value),as[JsObject] within the scala code, it prints the expression. I would wish to know if my approach is correct, and if not , is there a suitable solution.
Code --> scala.html
#(propertyList : List[PropertyDTO])
#for(property <- propertyList){
#if(property.isInputProperty){
#if(property.propertyType=="BL"){
val json = Json.parse(property.value).as[JsObject]
}
}
}
I would not advise doing this in a template - the point of having templates, and not embedding HTML generation directly into your Scala code, is to separate the view logic from the application logic. If you go embedding Scala code like this in your template, then what's the point in using a template?
Best practice is to prepare all your data for rendering before calling the template, and then pass it into the template, and keep the template as dumb as possible, just iterating and rendering values.
The problem is that you need to declare code to be interpreted as scala code by putting an # in front of it. The line
val json = Json.parse(property.value).as[JsObject]
gets interpreted as HTML as there is no # sign in the line indicating scala code. What you can do is declare a whole block to contain scala code using #{ ... }.
For example you can store the result of your for comprehension in a variable for later use in the template:
#import play.api.libs.json._
#validPropertiesAsJson = #{
for{
property <- propertyList
if property.isInputProperty
if property.propertyType == "BL"
} yield Json.parse(property.value).as[JsObject]
}
And later in the template use #validPropertiesAsJson to include the value.
More information can be found in the playframework documentation: http://www.playframework.com/documentation/2.2.0/ScalaTemplates
Keep in mind to put as little logic into the template as possible.
I have a data which are object array. It contains object arrays in a tree structure. I use JSON.stringify(myArray) but the data still contain array because I see [] inside the converted data.
In my case, I want all the data to be converted into json object not array regarding I need to used the data on TreeTable of SAPUI5.
Maybe I misunderstand. Please help me clear.
This is the example of the data that I got from JSON.stringify.
[{"value":{"Id":"00145E5BB2641EE284F811A7907717A3",
"Text":"BI-RA Reporting, analysis, and dashboards",
"Parent":"00145E5BB2641EE284F811A79076F7A3","Type":"BMF"},
"children":[{"value":{"Id":"00145E5BB2641EE284F811A7907737A3",
"Text":"WebIntelligence_4.1","Parent":"00145E5BB2641EE284F811A7907717A3",
"Type":"TWB"},"children":[{"value":{"Id":"00145E5BB2641EE284F811A7907757A3",
"Text":"Functional Areas","Parent":"00145E5BB2641EE284F811A7907737A3","Type":"TWB"},
"children":[{"value":{"Id":"00145E5BB2641EE284F811A7907777A3",
"Text":"CHARTING","Parent":"00145E5BB2641EE284F811A7907757A3","Type":"TWB"},
"children":[{"value":{"Id":"001999E0B9081EE28AB706BE26631E93",
"Text":"Drill","Parent":"00145E5BB2641EE284F811A7907777A3","Type":"TWB"},
"children":[{"value":{"Id":"001999E0B9081EE28AB706BE26633E93",
"Text":"[AUTO][ACCEPT] Drill on charts DHTML","Parent":"001999E0B9081EE28AB706BE26631E93",
"Type":"TWB","Ref":"UT_WEBI_CHARTS_DRILL_HTML"}},{"value":{"Id":"001999E0B9081EE28AB706BE26635E93",
"Text":"[AUTO][ACCEPT] Drill on charts JAVA","Parent":"001999E0B9081EE28AB706BE26631E93",
"Type":"TWB","Ref":"UT_WEBI_CHARTS_DRILL_JAVA"}}]},...
The output that I want shouldn't be array of object but should be something like...
{{"value":{
"Id":"00145E5BB2641EE284F811A7907717A3",
"Text":"BI-RA Reporting, analysis, and dashboards",
"Parent":"00145E5BB2641EE284F811A79076F7A3","Type":"BMF"},
"children":{
{"value":{
"Id":"00145E5BB2641EE284F811A7907737A3",
"Text":"WebIntelligence_4.1",
"Parent":"00145E5BB2641EE284F811A7907717A3",
"Type":"TWB"},
"children":{
{"value":{
"Id":"00145E5BB2641EE284F811A7907757A3",
"Text":"Functional Areas",
"Parent":"00145E5BB2641EE284F811A7907737A3",
"Type":"TWB"},...
JSON.stringify merely converts JavaScript data structures to a JSON-formatted string for consumption by other parsers (including JSON.parse). If you want it to stringify to a different value, you must change the source data structures first.
However, it seems that this can't be represented as anything other than an array because you have duplicate keys (i.e. value appears more than once). That would not be valid for a JavaScript object or a JSON representation of such.
I think what you want is
JSON.stringify(data[0]);
or perhaps
JSON.stringify(data[0].value);
where data is the object you passed in the question
I would like to use Microsoft ScriptControl to parse a JSON string in VBA, and then transform the resulting Object into Dictionary and Collection objects. I already know how to do the parsing with ScriptControl, but cannot figure out how to map the result into the Dictionary and Collection classes. I'm guessing that if I could figure out how to loop through the properties of an Object this would become clear...
Dim sc As ScriptControl
Dim obj As Variant
Set sc = CreateObject("ScriptControl")
sc.Language = "JScript"
Set obj = sc.Eval("("+json+")") ' json is a string containing raw JSON
' Now what?
By the way, I've used the vba-json library to get the output in terms of Dictionaries and Collections, but I find this library somewhat slow. It does not use ScriptControl.
EDIT: I found a discussion of getting object properties in this post.
Using JavaScript features of parsing JSON, on top of ScriptControl, we can create a parser in VBA which will list each and every data point inside the JSON. No matter how nested or complex the data structure is, as long as we provide a valid JSON, this parser will return a complete tree structure.
JavaScript’s Eval, getKeys and getProperty methods provide building blocks for validating and reading JSON.
Coupled with a recursive function in VBA we can iterate through all the keys (up to nth level) in a JSON string. Then using a Tree control (used in this article) or a dictionary or even on a simple worksheet, we can arrange the JSON data as required.
VBA Code:http://ashuvba.blogspot.in/2014/09/json-parser-in-vba-browsing-through-net.html
loop
This will help you to loop - add a myitem(n) method in javascript
from there you can map through VB code.