I have the following collection structure:
{
"col1": "col1_value1",
"col2": "col2_value1"
}
{
"col1": "col1_value2",
"col2": "col2_value2"
}
How do I get the following result in MongoDB:
{
"previous_col1": "", // init value
"col1": "col1_value1",
"previous_col2": "",
"col2": "col2_value1"
}
{
"previous_col1": "col1_value1", // previous value
"col1": "col1_value2",
"previous_col2": "col2_value1",
"col2": "col2_value2"
}
In SQL, I can achieve the same result by defining two variables #previous_col1 and #previous_col2 for keeping previous rows.
This mongo shell query does that:
var cur = db.collection.find();
var result_docs = [ ];
var prev_col1 = "", prev_col2 = "";
while (cur.hasNext()) {
let thisDoc = cur.next();
thisDoc.previous_col1 = prev_col1;
thisDoc.previous_col2 = prev_col2;
prev_col1 = thisDoc.col1;
prev_col2 = thisDoc.col2;
result_docs.push(thisDoc);
}
The result_docs array has all the documents updated with previous document's values.
Related
I have an array and object of items, I want to check each item in that array if its path has that object name, I push it in that object array.
So far this is all good, now if no match found I want to create a new item based on that array item name and push it inside it!
All my attempts ending in duplicated value, I think I need a third object/array I just can't think it anymore
To explain better:
cList = {
"rList": {
"Significant": [
{
"Path": "Significant\\Significant Charts",
"Name": "Charts"
}
]
},
};
and
SSList = {
value: [
{
"Name": "Test long name",
"Path": "/someFolder/Test long name",
},
{
"Name": "Untitled",
"Path": "/Significant/Untitled",
}
]
};
My current code
for (var cFolder in this.cList.rList) {
this.SSList.forEach((ssFile)=> {
if(ssFile.Path.indexOf(cFolder) >= 0){
this.cList.rList[cFolder].push(ssFile);
}
});
}
The first item in SSList will not be pushed since it doesn't match, I want to create a array and push it to inside rList
var folderName = ssFile.Path.split("/");
this.cList.rList[folderName[1]].push(ssFile);
One way to do it is to flip your inner and outer loops
let found = false;
this.SSList.value.forEach((ssFile) => {
for (var cFolder in this.cList.rList) {
if(ssFile.Path.indexOf(cFolder) >= 0){
found = true;
break;
}
}
if (found) {
this.cList.rList[cFolder].push(ssFile);
} else {
folderName = ssFile.Path.split("/");
if (!(folderName[1] in this.cList.rList))
this.cList.rList[folderName[1]] = [];
this.cList.rList[folderName[1]].push(ssFile);
}
found = false;
});
I'm trying to transform my object to list dynamically, so I'm building at view instead of declaring at controller.
I don't want to declare like this: custom_fields.title_field.type_text_field = [] because the title_field is built dynamic, it could be any kind of text like full_name
My json as is:
"custom_fields":{
"title_dynamic_generate_field":{
"type_text_field":{
"name":"John",
"first_name":"Wick"
},
"type_boolean_field":{
"is_badass": true,
"is_good_movie": true
},
"type_select_field": {
"this_select": 1,
"i_got_this": "nope i didnt got this"
}
},
And to be:
"custom_fields":{
"title_dynamic_generate_field":{
"type_text_field":[{
"name":"John",
"first_name":"Wick"
}],
"type_boolean_field":[{
"is_badass": true,
"is_good_movie": true
}],
"type_select_field": [{
"this_select": 1,
"i_got_this": "nope i didnt got this"
}]
},
the object I'm trying to transform into array is type_text_field which can be dynamic too, like type_date_field or type_select_field and so on.
My ng-model is like this:
ng-model="objectApp.application.applicant.custom_fields[layout.dynamic_title][input.type][input.variable]"
the [input.type] is that I'm trying to transform into array, how can I achieve this? I tried to use $index, but got strange results.
We can do it by 2 solutions:
There is a question about your task:
? how you want handle if we have more than one type_text_field in title_dynamic_generate_field? because you want to convert it to "type_text_field":[{},...]
however my answers about the question are:
If we know what's the dynamic params which we want to send theme as json, i mean if we know what is the key of title_dynamic_generate_field or type_text_field, we do as this sample:
var data = {
"custom_fields": {
dynamicParamIs1: 'title_dynamic_generate_field',
dynamicParamIs2: 'type_text_field',
"title_dynamic_generate_field": {
"type_text_field": {
"name": "John",
"first_name": "Wick"
}
}
}
}
var paramHelper1 = json.custom_fields[json.custom_fields.dynamicParamIs1];
var paramHelper2 = json.custom_fields.dynamicParamIs2;
var solutionA = function (object, as) {
var array = [];
for (var key in object) {
var newObject = object[key];
array.push(newObject);
}
object[as] = array;
}
solutionA(paramHelper1, paramHelper2);
We changed a model of our json which can help us to detect (find) the keys
If we don't know what is the dynamic params are, we do as this:
var data = {
"custom_fields": {
"title_dynamic_generate_field": {
"type_text_field": {
"name": "John",
"first_name": "Wick"
}
}
}
}
var solutionB = function (json) {
var array = [];
for (var key in json) {
var j1 = json[key];
for (var key2 in j1) {
var j2 = j1[key2];
for (var key3 in j2) {
var fullObject = j2[key3];
array.push(fullObject);
j2[key3] = array;
}
}
}
}
solutionB(data);
This sample is manual which we use nested for to detect the keys name
I have an array of objects in this form
nnz=[{
"verb":"has",
"nouns": "employees"
},
{
"verb":"has",
"nouns": "managers"
},
{
"verb":"have",
"nouns": "departments"
}
]
but i want to convert it into this form
[ {
"verb":"has",
"nouns": ["employees", "managers"]
},
{
"verb":"have",
nouns:["departments"]
}
]
and this work has to be done from client side. I am working in node.js. I want to allow user to select multiple nouns against each verb and when user selects nouns against verb it should be saved into an array in the above given form. I am unable to figure it out how can i implement this logic.
Update: we have to check verb too.now it became more tricky.
You can do somethong like this, using some Array built-in functions:
const array = [
{
"verb":"has",
"nouns": "employees"
},
{
"verb":"has",
"nouns": "managers"
},
{
"verb":"has",
"nouns": "departments"
}
]
const aggregated = array.reduce( (arr, el) =>{
let found = arr.find(ll => ll.verb == el.verb);
if(found) found.nouns.push(el.nouns);
else arr.push({verb : el.verb, nouns : [el.nouns] })
return arr;
}, []);
console.log(aggregated);
First create a temporary object that uses the verb value as keys then iterate your existing data pushing nouns to corresponding array in that temporary object.
Then map the temporary object to a new array.
nnz = [{
"verb": "has",
"nouns": "employees"
}, {
"verb": "has",
"nouns": "managers"
}, {
"verb": "has",
"nouns": "departments"
}]
var tmp = {};
nnz.forEach(function(item) {
tmp[item.verb] = tmp[item.verb] || {
verb: item.verb,
nouns: []
};
tmp[item.verb].nouns.push(item.nouns);
});
var results = Object.keys(tmp).map(function(key) {
return tmp[key];
});
console.log(results);
Try these two approaches as per your requirement. I hope it will work as per the expectation .
First Approach :
When you know the property names :
var nnz = [{
"verb":"has",
"nouns": "employees"
},
{
"verb":"has",
"nouns": "managers"
},
{
"verb":"has",
"nouns": "departments"
}
];
var newObj = {};
var nouns = [];
for (var i in nnz) {
nouns.push(nnz[i].nouns);
newObj.verb = nnz[i].verb;
newObj.nouns = nouns;
}
nnz = newObj;
console.log(nnz);
Second Approach :
When you don't know the property names :
var nnz = [{
"verb":"has",
"nouns": "employees"
},
{
"verb":"has",
"nouns": "managers"
},
{
"verb":"has",
"nouns": "departments"
}
];
var newObj = {};
var nounsArr = [];
for (var i in nnz) {
nounsArr.push(nnz[i][Object.keys(nnz[i])[1]])
nnz[i][Object.keys(nnz[i])[1]] = nounsArr;
var Objlen = Object.keys(nnz[i]).length;
for (var j=0;j<Objlen;j++) {
var objKeys = Object.keys(nnz[i])[j];
newObj[objKeys] = nnz[i][objKeys];
}
}
nnz = newObj;
console.log(nnz);
I have JSON object in the below format,
$scope.indexData = {
"custid": "1",
"addresses": [
{
"addressType": "P",
"address1": ""
},
{
"addressType": "M"
}
],
"personalDetails": {
"title": "",
"name": ""
}
}
I want to store the object using HTML5 indexDB. how do i store the object?
I tried in the following way, but no luck.
var db;
var request = window.indexedDB.open("newDatabase", 1);
request.onupgradeneeded = function(event) {
var db = event.target.result;
var objectStore = db.createObjectStore("customers");
for (var i in $scope.indexData) {
objectStore.add($scope.indexData[i]);
}
}
I am getting the following error saying: Uncaught DataError: Failed to execute 'add' on 'IDBObjectStore': The object store uses out-of-line keys and has no key generator and the key parameter was not provided.
You are specifying a keypath which instruct the store to use in-line keys. your code maybe like this:
var db;
var request = window.indexedDB.open("newDatabase", 1);
request.onupgradeneeded = function(event) {
var db = event.target.result;
var objectStore = db.createObjectStore("customers",{keyPath: "isbn"});
for (var i in $scope.indexData) {
objectStore.add({i:$scope.indexData[i], isbn:i});
}
}
I got a Json file like;
{
"Cities": [
{
"Name": "London",
"Country": "UK"
},
{
"Name": "Rome",
"Country": "ITA"
},
{
"Name": "Antalya",
"Country": "TR"
}
]
}
How can I get City Names as an array like ["London","Rome","Antalya"] without doing;
var tempJSON = JSON.parse(jsonCities);
var arrayCityNames = [];
for (var i = 0; i < tempJSON.Table.length; i++){
arrayCityNames[i] = tempJSON.Table[i].Name;
}
if tempJSON was a Dataset we could use getColumnArray
arrayCityNames = Data.Dataset.getColumnArray("Name");
Is there any built in method to do this for parsed JSON's?
Please keep in mind that the question is related to Smartface.io Framework, not jquery itself
Try this:
var tempJSON = JSON.parse(jsonCities);// here you load your JSON
var arrayCityNames = []; // your output array
var cityArray = tempJSON['Cities']; // enter Cities array
for (var i = 0; i <cityArray.length; i++){ // iterate over your list
arrayCityNames.push(cityArray[i]['Name']); // add to list name of your city list
}