I use the select extension an d try to 'alert' with the id of the selected rows.
the following code fails:
let sels = jqTable.api().rows({ selected: true });
let st = '';
sels.each(function (value, index) {
st += ',' + sels.row(value).id();
});
alert(st);
The function is called once independently of selected rows:
0 row: value = [], index = 0
>=1 : value = [0, 2], index = 0
The following code succeeds:
let sels = jqTable.api().rows({ selected: true });
let st = '';
for (let i = 0; i < sels.count(); i++) {
st += ',' + sels.row(sels[0][i]).id();
}
alert(st);
what do I missunderstand with each() :
Iterate over the contents of the API result set.
I notice that the following code runs:
sels.data().each(function (value, index) {
st += ',' + value.IdFile;
});
But using it cancels the advantage of rowId : 'IdFile' in the datatable configuration.
each() is used when the dataset returns an array of results within the API objects - in the case of rows() this isn't the case - it returns a single result, which happen to be an array containing the rowIDs of the selected rows.
Your first code block fails as there's only one iteration (the results are a single array).
Your second block works, because you're iterating over that single array (sels[0]).
And your third also works, as the rows().data() does generate an array containing the data of all the selected rows.
This example will hopefully help!
Related
What I need is to sort data I get from an API into different arrays but add '0' value where there is no value at 1 type but is at the other type/s. Now is this possible with array.filter since its faster then a bunch of for and if loops ?
So let's say I get following data from SQL to the API:
Day Type Amount
-----------------------
12.1.2022 1 11
12.1.2022 2 4
13.1.2022 1 5
14.1.2022 2 9
16.1.2022 2 30
If I run this code :
this.data = result.Data;
let date = [];
const data = { 'dataType1': [], 'dataType2': [], 'dataType3': [], 'dataType4': [] }
/*only writing example for 2 types since for 4 it would be too long but i desire
answer that works for any amount of types or for 4 types */
this.data.forEach(x => {
var lastAddress = date[date.length - 1]
if (x.type == 1) {dataType1.push(x.Amount) }
if (x.type == 2) {dataType2.push(x.Amount) }}
lastAddress != x.Day ? date.push(x.Day) : '';
The array I get for type1 is [11,5]
and for type2 I get [4,9,30].
And for dates i get all the unique dates.
But the data I would like is: [11,5,0,0] and [4,0,9,30]
The size of array also has to match the size of Day array at the end.
which would be unique dates.. in this case:
[12.1.2022, 13.1.2022, 14.1.2022, 16.1.2022]
I have already tried to solve this with some for, if and while loops but it gets way too messy, so I'm looking for an alternative.
Also i have 4 types but for reference i only wrote sample for 2.
you can
first get the uniq values
loop over the data to create an array of object with
{date:string,values:number[]}
//create a function:
matrix(data:any[])
{
const uniqTypes=data.reduce((a,b)=>a.indexOf(b.type)>=0?a:
[...a,b.type],[])
const result=[]
this.data.forEach((x:any)=>{
let index=result.findIndex(r=>r.date==x.date)
if (index<0)
{
result.push({date:x.date,values:[...uniqTypes].fill(0)})
index=result.length-1;
}
result[index].values[uniqTypes.indexOf(x.type)]=x.amount
})
return result
}
//and use like
result=this.matrix(this.data);
NOTE: You can create the uniqType outside the function as variable and pass as argument to the function
stackblitz
const type1 = [];
const type2 = [];
data.forEach(item=>{
if(item.type==1){
type1.push(item.amount)
type2.push(0)
}else{
type1.push(0)
type2.push(item.amount)
}
})
console.log(type1)
console.log(type2)
I need to pass the value 'A' to be selected into a Qliksense extension. This extension contains 1 dimension and 1 measure. I would like 'A' to be selected in the 1 dimension.
It seems that self.selectValues(0, 'A', false); is the call for this. I can't get this to work at all.
How do I select 'A' in this extension or the underlying table?
Details:
I have the following code inside the paint function that renders the data (this part works):
// iterate over all rows
var hc = layout.qHyperCube;
for (var r = 0; r < hc.qDataPages[0].qMatrix.length; r++) {
table += '<tr>';
// iterate over all cells within a row
for (var c = 0; c < hc.qDataPages[0].qMatrix[r].length; c++) {
table += '<td>';
table += hc.qDataPages[0].qMatrix[r][c].qText;
table += '</td>';
}
table += '</tr>';
}
Method expects an array and the element number of the dimension value, so this should work:
self.selectValues(0, [qElemNumber], false);
Is there any way to get every index value of a table?
Example:
local mytbl = {
["Hello"] = 123,
["world"] = 321
}
I want to get this:
{"Hello", "world"}
local t = {}
for k, v in pairs(mytbl) do
table.insert(t, k) -- or t[#t + 1] = k
end
Note that the order of how pairs iterates a table is not specified. If you want to make sure the elements in the result are in a certain order, use:
table.sort(t)
Im trying to get all the data rows that contain a certain set of data.
In my database i have some values, including start and length.
I have an array that contains integers called startTimes and another called endTimes.
I need a where clause that would return the records that have a start value contained in startTimes, OR start+length contained in endTimes.
Is there any way to do this?
Thanks
IQueryable<request> proposedRequest = db.requests.Include(r => r.rooms);
proposedRequest = proposedRequest.Where(r=>r.booked.Equals(1));
proposedRequest = proposedRequest.Where(r=>r.roundID.Equals(roundID))8;
proposedRequest = proposedRequest.Where(r=>r.day.Equals(day));
int[] startTimes;
int[] endTimes;
for(var q=0;q<time;q++){
startTimes[startTimes.Length] = time + q;
endTimes[endTimes.Length] = time + q + 1;
}
proposedRequest = proposedRequest.Where(//what goes in here);
i have an array startTime=[1,3,4] and an array endTime=[2,4,5] lets
say. I need to see if any of those values match my records? I dont
think the above would do the job
To check if you have value in Array of int, Use the Contains Method:
proposedRequest = proposedRequest.Where(s => startTimes.Contains(s.INT_ID)
|| endTimes.Contains(s.INT_ID));
Syntax: ARRAY.Contains(ID_TO_SEARCH)
it returns a boolean:
var list = new List<int> {1,2,3,4,5};
var intVar = 4;
var exists = list.Contains(intVar);
will something like this suffice?
var data = collection.Where(
t => startTimes.Contains(t.theTime) ||
endTimes.Contains(t.theTime + theLength));
proposedRequest.Where(pr => startTimesArray.Contains(pr.start) || endTimesArray.Contains(pr.start + pr.length));
in websql we can request a certain row like this:
tx.executeSql('SELECT * FROM tblSettings where id = ?', [id], function(tx, rs){
// do stuff with the resultset.
},
function errorHandler(tx, e){
// do something upon error.
console.warn('SQL Error: ', e);
});
however, I know regular SQL and figured i should be able to request
var arr = [1, 2, 3];
tx.executeSql('SELECT * FROM tblSettings where id in (?)', [arr], function(tx, rs){
// do stuff with the resultset.
},
function errorHandler(tx, e){
// do something upon error.
console.warn('SQL Error: ', e);
});
but that gives us no results, the result is always empty. if i would remove the [arr] into arr, then the sql would get a variable amount of parameters, so i figured it should be [arr]. otherwise it would require us to add a dynamic amount of question marks (as many as there are id's in the array).
so can anyone see what i'm doing wrong?
aparently, there is no other solution, than to manually add a question mark for every item in your array.
this is actually in the specs on w3.org
var q = "";
for each (var i in labels)
q += (q == "" ? "" : ", ") + "?";
// later to be used as such:
t.executeSql('SELECT id FROM docs WHERE label IN (' + q + ')', labels, function (t, d) {
// do stuff with result...
});
more info here: http://www.w3.org/TR/webdatabase/#introduction (at the end of the introduction)
however, at the moment i created a helper function that creates such a string for me
might be better than the above, might not, i haven't done any performance testing.
this is what i use now
var createParamString = function(arr){
return _(arr).map(function(){ return "?"; }).join(',');
}
// when called like this:
createparamString([1,2,3,4,5]); // >> returns ?,?,?,?,?
this however makes use of the underscore.js library we have in our project.
Good answer. It was interesting to read an explanation in the official documentation.
I see this question was answered in 2012. I tried it in Google 37 exactly as it is recommened and this is what I got.
Data on input: (I outlined them with the black pencil)
Chrome complains:
So it accepts as many question signs as many input parameters are given. (Let us pay attention that although array is passed it's treated as one parameter)
Eventually I came up to this solution:
var activeItemIds = [1,2,3];
var q = "";
for (var i=0; i< activeItemIds.length; i++) {
q += '"' + activeItemIds[i] + '", ';
}
q= q.substring(0, q.length - 2);
var query = 'SELECT "id" FROM "products" WHERE "id" IN (' + q + ')';
_db.transaction(function (tx) {
tx.executeSql(query, [], function (tx, results1) {
console.log(results1);
debugger;
}, function (a, b) {
console.warn(a);
console.warn(b);
})
})