Parse through multidemensional array in 'Swift' - arrays

I can't find out how to write a multidemensional array using 'Swift' and parse it. The sample code below is what I need it to do. The sample is written in JavaScript because I can't find the correct syntax in Swift but that is what I need to convert it to:
var array = [{
name:'Steve',
dates:[
'10-29-2016',
'11-03-2016',
]
},{
name:'Bill',
dates:[
'08-13-2016',
'01-20-2016',
]
}
]
console.log(array[0].name)
// logs 'Steve'
console.log(array[0].dates[])
// logs '11-03-2016'
When I tried to write it in Swift I get a lot of syntax errors and from my research I am unable to find examples using this array syntax. Any ideas? Thanks in advance!


Here I'm creating a list of tuples, and the tuple consists of
1) name (of type String) and 2) dates (of type List of Strings).
var arr:[(name: String, dates: [String])] = [
(name: "Steve", dates: ["10-29-2016", "11-03-2016"]),
(name: "Bill", dates: ["10-29-2016", "11-03-2016"])
]
for tup in arr {
print(tup.name)
print(tup.dates)
}


import UIKit
var array = [
["name":"Steve",
"dates":[
"10-29-2016",
"11-03-2016"
],
],
[
"name":"Bill",
"dates":[
"08-13-2016",
"01-20-2016"
]
]
]
print(array[0])
print(array[0]["name"])

Related

MongoDb: search only if it contains all ids within the array

I am looking for an array of ids, inside another array, the problem is that if it contains at least one "id" it returns the result. The validation should be that it has to have all the "ids" that I am passing.
{ subcategories: { $in: [ ObjectId('61729d550e8fe20011cc57d2', ObjectId('61693f589a34340012b1d5d8'), ObjectId('61693f2c9a34340012b1d5b7') )] } }
example:
subcategories: ["61729d550e8fe20011cc57d2", "61693f2c9a34340012b1d5b7"] -> this one should not appear, because it contains only 2 of the 3 I am looking for

I think you are looking for $all.
The docs says:
The $all operator selects the documents where the value of a field is an array that contains all the specified elements
db.collection.find({
subcategories: {
$all: [
"61729d550e8fe20011cc57d2",
"61693f589a34340012b1d5d8",
"61693f2c9a34340012b1d5b7"
]
}
})
Example here

Using $rename in MongoDB for an item inside an array of objects

Consider the following MongoDB collection of a few thousand Objects:
{
_id: ObjectId("xxx")
FM_ID: "123"
Meter_Readings: Array
0: Object
Date: 2011-10-07
Begin_Read: true
Reading: 652
1: Object
Date: 2018-10-01
Begin_Reading: true
Reading: 851
}
The wrong key was entered for 2018 into the array and needs to be renamed to "Begin_Read". I have a list using another aggregate of all the objects that have the incorrect key. The objects within the array don't have an _id value, so are hard to select. I was thinking I could iterate through the collection and find the array index of the errored Readings and using the _id of the object to perform the $rename on the key.
I am trying to get the index of the array, but cannot seem to select it correctly. The following aggregate is what I have:
[
{
'$match': {
'_id': ObjectId('xxx')
}
}, {
'$project': {
'index': {
'$indexOfArray': [
'$Meter_Readings', {
'$eq': [
'$Meter_Readings.Begin_Reading', True
]
}
]
}
}
}
]
Its result is always -1 which I think means my expression must be wrong as the expected result would be 1.
I'm using Python for this script (can use javascript as well), if there is a better way to do this (maybe a filter?), I'm open to alternatives, just what I've come up with.

I fixed this myself. I was close with the aggregate but needed to look at a different field for some reason that one did not work:
{
'$project': {
'index': {
'$indexOfArray': [
'$Meter_Readings.Water_Year', 2018
]
}
}
}
What I did learn was the to find an object within an array you can just reference it in the array identifier in the $indexOfArray method. I hope that might help someone else.

Construct unique arrays from nested array values with common parents

Likely a close question to JQ: Nested JSON transformation but I wasn't able to get my head around it.
Sample JSON:
"value": [
{
"FeatureStatus": [
{
"FeatureName": "Sway1",
"FeatureServiceStatus": "ServiceOperational"
},
{
"FeatureName": "Sway2",
"FeatureServiceStatus": "ServiceDegraded"
}
],
"Id": "SwayEnterprise",
},
{
"FeatureStatus": [
{
"FeatureName": "yammerfeatures",
"FeatureServiceStatus": "ServiceOperational"
}
],
"Id": "yammer"
}
]
What I want to do is create an output with jq which results in the following;
{"Sway":"Sway1":"ServiceOperational"},
{"Sway":"Sway2":"ServiceDegraded"},
{"Yammer":"yammerfeatures":"ServiceOperational"}
My various attempts either end up with thousands of non-unique (i.e Yammer with Sway status), or only one Id with x number of FeatureServiceStatus.
Any pointers would be greatly appreciated. I've gone through the tutorial and the cookbook. I am perhaps 2.5 days into using jq.

Assuming that the enclosing braces have been added to make the input valid JSON, the filter:
.value[]
| [.Id] + (.FeatureStatus[] | [ .FeatureName, .FeatureServiceStatus ])
produces:
["SwayEnterprise","Sway1","ServiceOperational"]
["SwayEnterprise","Sway2","ServiceDegraded"]
["yammer","yammerfeatures","ServiceOperational"]
You can then easily reformat this as desired.

Json creation in ruby for a list

I am new to Ruby.
I want to create a JSON file for a group of elements.
For this, I am using eachfunction to retrieve the datas. I want to create json as follows for the 4 length array,
'{
"desc":{
"1":"1st Value",
"2":"2nd value"
"3":"3rd Value",
"4":"4th value"
},
}'
This is my array iteration,
REXML::XPath.each( doc, "//time" ) { |element1|
puts element1.get_text
}
I know here is the simple code to generate a JSON,
require 'json/add/core'
class Item < Struct.new(:id, :name); end
chair = Item.new(1, 'chair')
puts JSON.pretty_generate(chair)
This syntax will generate a json as follows,
{
"json_class": "Item",
"v": [
1,
"chair"
]
}
But I'm not sure how to do that to make JSON for my elements as stated above. Google search didn't give me a proper way to do this.
Can anyone help me here?

it means this?:
require 'json'
my_arr= ["1st Value","2nd Value","3rd Value","4th Value"]
tmp_str= {}
tmp_str["desc"] = {}
my_arr.each do |x|
tmp_str["desc"]["#{x[0]}"] = x
end
puts JSON.generate(tmp_str)
you can iterate the string array ,then take the strings to hash object.JSON can easy to parse Hash objcect .

Parse JSON array file with JSONPATH

I want to parse this with JSONPath:
[
[50.4154134372953,-1.28486558931069,"CLASS B",9,205,0,"UK",431500382,3,4],
[50.3058858494047,-0.976070494820637,"CLASS B",9,239,0,"UK",2750350,21,2]
]
Can you help with that please?

If the object is:
[
[50.4154134372953,-1.28486558931069,"CLASS B",9,205,0,"UK",431500382,3,4],
[50.3058858494047,-0.976070494820637,"CLASS B",9,239,0,"UK",2750350,21,2]
]
Then "$[0]" will return:
[50.4154134372953,-1.28486558931069,"CLASS B",9,205,0,"UK",431500382,3,4]
And "$[1]" will return:
[50.3058858494047,-0.976070494820637,"CLASS B",9,239,0,"UK",2750350,21,2]
You can do it two levels deep as well. "$[0][4]" will return:
205
You can also extract the elements of the array into a list with "$[*]", which will return a list of 2 elements. The first being:
[50.4154134372953,-1.28486558931069,"CLASS B",9,205,0,"UK",431500382,3,4]
and the second being:
[50.3058858494047,-0.976070494820637,"CLASS B",9,239,0,"UK",2750350,21,2]

Using DefiantJS, you can search a JSON structure with XPath syntax. This library extends the global object JSON with a search function.
In this scenario, you can write something like this;
var data = [
[50.4154134372953,-1.28486558931069,"CLASS B",9,205,0,"UK",431500382,3,4],
[50.3058858494047,-0.976070494820637,"CLASS B",9,239,0,"UK",2750350,21,2]
],
search = JSON.search( data, '//*/*/*' );
Check out this fiddle; http://jsfiddle.net/hbi99/5NfeM/

This works for me
JsonPath.with(jsonResponse).param("name", "getName").get("findAll { a -> a.name == name }")

Resources