I am trying to assign a variable to an item in an array that has a specific value for a property. For example, I am trying to grab the item that has "Id" value = 15. The way I am currently doing it, I am only returning the first item in the array, no matter the Id value I am inserting.
var credential = ko.utils.arrayFirst(allCredentialsList, function (credential) {
return credential.Id = id;
});
You need to use the === (or ==) comparison operator, not the = assignment operator.
var credential = ko.utils.arrayFirst(allCredentialsList, function (credential) {
return credential.Id === id;
});
Related
Here is what I have tried.
I have tried dot notation and quotes. None of them seem to work. What exactly could be the problem?
var clientsList;
Client.find({}, function(err, clients) {
clientsList = clients;
// I have 10 clients in the loop
for (var j = 0; j < clientsList.length; j++) {
var x = clientsList[j];
x.count = "20";
//x["count"] = "20";
console.log(x);
}
});
Existing Client object
{"name":"abcd", "email":"abc#gmail.com"}
I'm unable to add the count key value pair into the client object. What could be the problem?
I suspect the object you're being given by Client.find has extensions prevented (it's sealed or frozen).
You can create a new object with the original's own, enumerable properties plus your count property using ES2018 spread notation:
x = {...x, count: "20"};
...or ES2015's Object.assign:
x = Object.assign({}, x, {count: "20"});
If the array is also sealed or frozen, you can copy it and its objects like this:
clientList = clients.map(client => {
return {...client, count: "20"}; // Or with `Object.assign`
});
or even with the concise form of the arrow function:
clientList = clients.map(client => ({...client, count: "20"}));
Side note: This pattern:
var clientsList;
Client.find({}, function(err, clients) {
clientsList = clients;
// ...
});
...often suggests that you intend to use clientsList in code following the Client.find call and expect it to have the result from that call's callback. See this question's answers for why, if you're doing that, it doesn't work.
I have this function for extracting the timestamp from two JSON objects:
lineReader.on('line', function (line) {
var obj = JSON.parse(line);
if(obj.Event == "SparkListenerApplicationStart" || obj.Event == "SparkListenerApplicationEnd") {
console.log('Line from file:', obj.Timestamp);
}
});
The JSON comes from a log file(not JSON) where each line represents an entry in the log and each line also happens to be in JSON format on its own.
The two objects represent the start and finish of a job. These can be identified by the event key(SparkListenerApplicationStart and SparkListenerApplicationEnd). They also both contain a timestamp key. I want to subtract the end time from the start time to get the duration.
My thinking is to assign the timestamp from the JSON where Event key = SparkListenerApplicationStart to one variable and assign the timestamp from the JSON where Event key = SparkListenerApplicationEnd to another variable and subtract one from the other. How can I do this? I know I can't simply do anything like:
var startTime = if(obj.Event == "SparkListenerApplicationStart"){
return obj.Timestamp;
}
I'm not sure if I understood, but if are reading rows and want get the Timestamp of each row I would re-write a new object;
const collection = []
lineReader.on('line', function (line) {
var obj = JSON.parse(line);
if(obj.Event == "SparkListenerApplicationStart" || obj.Event == "SparkListenerApplicationEnd") {
// console.log('Line from file:', obj.Timestamp);
collection.push(obj.Timestamp)
}
});
console.log(collection);
Where collection could be a LocalStorage, Global Variable, or something alike.
Additional info
With regard to my comment where I queried how to identify the start and end times, I ended up setting start as the smallest value and end as the largest. Here is my final code:
const collection = []
lineReader.on('line', function (line) {
var obj = JSON.parse(line);
if((obj.Event == "SparkListenerApplicationStart" || obj.Event == "SparkListenerApplicationEnd")) {
collection.push(obj.Timestamp);
if(collection.length == 2){
startTime = Math.min.apply(null, collection);
finishTime = Math.max.apply(null, collection);
duration = finishTime - startTime;
console.log(duration);
}
}
});
Im trying to get property from oData return model. I set data in success callback function from oData to JSON model.
oODataModel.read("/ConnObjSet?$filter=Objecttype eq 'CONNOBJ' and ConnObject eq '20000000002'",
true,
true,
false,
function _OnSuccess(oData, oResponse){
var oJSON = new sap.ui.model.json.JSONModel();
oJSON.setData(oData);
sap.ui.getCore().setModel(oJSON, "ConnectionObject");
},
This is my JSON object in console log and highlighted property I want to get. I want to get every 15 Buspartner number from whole array.
And this is what I tried to get property:
var oLog = sap.ui.getCore().getModel("ConnectionObject").oData.results;
console.log(oLog);
If you have an array of objects, you can get an array of properties from each of these objects by using the Array.map() function.
So in your case:
var aResults = this.getView().getModel().getProperty("/results");
var aBuspartner = aResults.map(function (r) { return r.Buspartner});
var oJSONModel = new sap.ui.model.json.JSONModel();
oJSONModel.setProperty("/resultarray", aBuspartner)
Please try:
var aResults = this.getView().getModel().getProperty("/results");
var oJSONModel = new sap.ui.model.json.JSONModel();
oJSONModel.setProperty("/resultarray",new Array())
for(var i = 0; i<aResults.lenght;i++){
oJSONModel.getProperty("/resultarray").push(aResults[i].Buspartner)
}
You could also try to add a filter and select to your oData.read
The oData-URL
http://services.odata.org/V2/Northwind/Northwind.svc/Products
selects all Product with all their properties
http://services.odata.org/V2/Northwind/Northwind.svc/Products?$filter=UnitsInStock%20eq%2017
shows only Products with "UnitsInStock=17"
http://services.odata.org/V2/Northwind/Northwind.svc/Products?$select=ProductID&$filter=UnitsInStock%20eq%2017
selects only the ProductID of Products with "UnitsInStock=17"
so
oODataModel.read("/ConnObjSet?$select=Buspartner&$filter=Objecttype eq 'CONNOBJ' and ConnObject eq '20000000002'"
...
should get the filtered Buspartners directly.
I have the code as following
var ar:Array = ["Joe","Bob","Curl","Curl"];
var distinctData = ar.filter(function(itm, i){
return ar.indexOf(itm)== i;
});
The question is how can I get the parent array ar inside the filter function? I tried this keyword but it wasn't working.
The 2nd argument of filter can be used to provide a value for this within the callback. In your case that means you can do:
ar.filter(function(itm, i) {
return this.indexOf(itm) === i;
}, ar);
I have a Goggle Spreadsheet with some data, and I want to write a custom function to use in the sheet, which accepts a range of cells and a delimiter character, takes each cell value, splits it by the delimiter, and counts the total.
For example
Column A has the following values in rows 1-3: {"Sheep","Sheep,Dog","Cat"}
My function would be called like this: =CountDelimitedValues(A1:A3;",");
It should return the value: 4 (1+2+1)
The problem I am having is in my custom script I get errors like
"TypeError: cannot get function GetValues from type Sheep"
This is my current script:
function CountArrayList(arrayList, delimiter) {
var count = 0;
//for (i=0; i<array.length; i++)
//{
//count += array[i].split(delimiter).length;
//}
var newArray = arrayList.GetValues();
return newArray.ToString();
//return count;
}
I understand that the parameter arraylist is receiving an array of objects from the spreadsheet, however I don't know how to get the value out of those objects, or perhaps cast them into strings.
Alternatively I might be going about this in the wrong way? I have another script which extracts the text from a cell between two characters which works fine for a single cell. What is it about a range of cells that is different?
That's something you can achieve without using script but plain old formula's:
=SUM(ARRAYFORMULA(LEN(A1:A3)-LEN(SUBSTITUTE(A1:A3; ","; "")) + 1))
Credit goes here: https://webapps.stackexchange.com/q/37744/29140
something like this works :
function CountArrayList(arrayList) {
return arrayList.toString().split(',').length
}
wouldn't it be sufficient ?
edit Oooops, sorry I forgot the user defined delimiter, so like this
function CountArrayList(arrayList,del) {
return arrayList.toString().split(del).length
}
usage : =CountArrayList(A1:C1;",")
NOTE : in this example above it would be dangerous to use another delimiter than "," since the toString() joins the array elements with commas... if you really need to do so try using a regex to change the commas to what you use and apply the split on that.
try like this :
function CountArrayList(arrayList,del) {
return arrayList.toString().replace(/,/g,del).split(del).length
}
Another solution I have was that I needed to implicitly cast the objects in the array being passed as a string.
For example this function accepts the array of cells, and outputs their contents as a string with del as the delimiter (similar to the String.Split() function). Note the TrimString function and that it is being passed an element of the array.
function ArrayToString(array,del) {
var string = "";
for (i=0; i < array.length; i++) {
if (array[i] != null) {
var trimmedString = TrimString(array[i]);
if (trimmedString != "") {
if (string.length > 0) {
string += del;
}
string += trimmedString;
}
}
}
return string;
}
Below is the TrimString function.
function TrimString(string) {
var value = "";
if (string != "" && string != null) {
var newString = "";
newString += string;
var frontStringTrimmed = newString.replace(/^\s*/,"");
var backStringTrimmed = frontStringTrimmed.replace(/\s*$/,"");
value = backStringTrimmed;
}
return value;
}
What I found is that this code threw a TypeError unless I included the declaration of the newString variable, and added the array element object to it, implicitly casting the array element object as a string. Otherwise the replace() functions could not be called.