I have done something similar to this in php and cannot figure it out in mvc3. I want to pull the top 100 results from a table and append a number to each result to print it out like a Top Charts type of deal. I want to just add the rank number on the fly.
My Code:
var tracks = db.Query(#"SELECT * FROM tracks ORDER BY plays DESC LIMIT 100").ToList();
#foreach (var track in tracks) {
var a = 0;
var x = a+1;
<tr>
<td>#x</td>
<td>#track.Title</td>
</tr>
}
What I want it to do (Append the next number in the next one):
<tr><td>1</td><td>Track Name</td></tr>
<tr><td>2</td><td>Track Name2</td></tr>
Nevermind project aborted, since people gotta criticize so hard on people trying to start a new flavor to write. Its all good.
Related
I have a huge component that can receive a start and end date, plus some floors numbers, and based on these numbers, it generates a table, something like the below image.
Example of this table:
The problem is, how to make this table generate faster?
To generate the floors I use a for a loop.
JavaScript code:
for (let i = 0; i < section.floorQuantity; i++) {
floors.push(i + 1)
}
and for each day, I generate a column with the number of floors as cells (divs).
you can use "useMemo" to cache the same computation and it's result change when input data changes
const computeExpensiveValue=(inputs)=>{
//do something
return result
}
const memoizedValue = useMemo(() => computeExpensiveValue(a, b), [a, b]);
I have a table, with one column for each day of the week, in which with a ng-repeat, I put the hours worked on a specific project in that week.
The data gets pulled from a database.
What I'm having trouble with is, each project can have different subprojects, and when this happens, they all get put in a rowspan under the same main project, as you can see in the image ( the "SU" Project has 2 subprojects "ghfgh" and "testtesttest").
Now, the total hours in the last column gets pulled as well from the database, where all the hours of a project in a specific week are summed.
How can I make that IF a project has subprojects, their hours that week get summed in a single rowspan as well? (in the image I put an arrow showing the result wanted)
If I use the same code to give the rowspan to the subprojects, it gives the right rowspan to the total column, but obviously only shows the hours of the first subproject (in this case "ghfgh")
<tr ng-repeat="p in vm.presences">
<td ng-if="p.showProject" rowspan="{{p.projectCount}}">{{p.projectName}}</td>
<td>{{p.description}}</td>
<td>{{p.monday}}</td>
<td>{{p.tuesday}}</td>
<td>{{p.wednesday}}</td>
<td>{{p.thursday}}</td>
<td>{{p.friday}}</td>
<td>{{p.saturday}}</td>
<td>{{p.sunday}}</td>
<td ng-if="p.showProject" rowspan="{{p.projectCount}}">{{p.total}}</td>
</tr>
and the code used to check if there are multiple entries of the same project in a given week, to group them in the same rowspan is
weeklyPresences.forEach((p, i) => {
const differentProject = i === 0 || weeklyPresences[i - 1].projectName !== p.projectName;
p.showProject = differentProject;
if (differentProject) {
p.projectCount = weeklyPresences.filter(pres => pres.projectName === p.projectName).length;
} else {
p.projectCount = weeklyPresences[i - 1].projectCount;
}
});
return weeklyPresences;
any idea on how I could group the hours of the subprojects?
I was thinking about some loop that checks if a project has multiple entries like the code above, if it doesn't, the var total stays the same, otherwise, it takes them and sums them in a new var.
var arr= [1, 2, 3];
var sum = arr.reduce((a, b) => a + b, 0);
console.log(sum); // 6
So I need to screen scrape data off a website and return it to a spreadsheet based off if a charge amount matched as well the date was the most recent in the table. If there was simply one line in the table, the macro pulls that accordingly. So most of the code is good, I am connected to the website, pulling everything effectively. Where I am struggling is getting the logic to work where the two amounts match as well as the date being the most recent in the HTML table.
I guess what my question is how do I loop through Item(5) the column of that table and specify it to choose the most recent date, also setting the value so that it only finds the one equal to the charge amount. I only want a one to one match. I am new to this so if anyone wants to help me I would greatly appreciate it.
Set IHEC = iHTMLDoc.getElementsByTagName("TR")
If IHEC.Length > 2 Then
For index = 0 to IHEC.Length - 1
Set IHEC_TD = IHEC.Item(index).getElementsByTagName("TD")
Do Until IHEC.Length <2 Or index = IHEC.Length - 1
If IHEC.TD.Item(3).innerText = myBilledAmount Then
myItem1 = IHEC_TDItem(0).innerText
myItem2 = IHEC_TDItem(1).innerText
myItem3 = IHEC_TDItem(2).innerText
myItem4 = IHEC_TDItem(3).innerText
myItem5 = IHEC_TDItem(4).innerText
myItem6 = IHEC_TDItem(5).innerText
myItem7 = IHEC_TDItem(6).innerText
myItem8 = IHEC_TDItem(7).innerText
myItem9 = IHEC_TDItem(8).innerText
End If
End If
Loop
Next Index
I'm preparing data for a datatable in Linq2Sql
This code highlights as a 'Possible multiple enumeration of IEnumerable' (in Resharper)
// filtered is an IEnumerable or an IQueryable
var total = filtered.Count();
var displayed = filtered
.Skip(param.iDisplayStart)
.Take(param.iDisplayLength).ToList();
And I am 100% sure Resharper is right.
How do I rewrite this to avoid the warning
To clarify, I get that I can put a ToList on the end of filtered to only do one query to the Database eg.
var filteredAndRun = filtered.ToList();
var total = filteredAndRun.Count();
var displayed = filteredAndRun
.Skip(param.iDisplayStart)
.Take(param.iDisplayLength).ToList();
but this brings back a ton more data than I want to transport over the network.
I'm expecting that I can't have my cake and eat it too. :(
It sounds like you're more concerned with multiple enumeration of IQueryable<T> rather than IEnumerable<T>.
However, in your case, it doesn't matter.
The Count call should translate to a simple and very fast SQL count query. It's only the second query that actually brings back any records.
If it is an IEnumerable<T> then the data is in memory and it'll be super fast in any case.
I'd keep your code exactly the same as it is and only worry about performance tuning when you discover you have a significant performance issue. :-)
You could also do something like
count = 0;
displayed = new List();
iDisplayStop = param.iDisplayStart + param.iDisplayLength;
foreach (element in filteredAndRun) {
++count;
if ((count < param.iDisplayStart) || (count > iDisplayStop))
continue;
displayed.Add(element);
}
That's pseudocode, obviously, and I might be off-by-one in the edge conditions, but that algorithm gets you the count with only a single iteration and you have the list of displayed items only at the end.
Introduction:
I have an AdvancedDataGrid displaying hierarchical data illustrated by the image below:
The branch nodes "Prosjekt" and "Tiltak" display the sum of the leaf nodes below.
Problem: I want the root node "Tavle" to display the total sum of the branch nodes below. When i attempted to do this by adding the same SummaryRow the sum of the root node was not calculcated correctly(Every node's sum was calculated twice).
dg_Teknikktavles = new AutoSizingAdvancedDataGrid();
dg_Teknikktavles.sortExpertMode="true";
dg_Teknikktavles.headerHeight = 50;
dg_Teknikktavles.variableRowHeight = true;
dg_Teknikktavles.addEventListener(ListEvent.ITEM_CLICK,dg_TeknikktavlesItemClicked);
dg_Teknikktavles.editable="false";
dg_Teknikktavles.percentWidth=100;
dg_Teknikktavles.minColumnWidth =0.8;
dg_Teknikktavles.height = 1000;
var sumFieldArray:Array = new Array(context.brukerList.length);
for(var i:int = 0; i < context.brukerList.length; i++)
{
var sumField:SummaryField2 = new SummaryField2();
sumField.dataField = Ressurstavle.ressursKey + i;
sumField.summaryOperation = "SUM";
sumFieldArray[i] = sumField;
}
var summaryRow:SummaryRow = new SummaryRow();
summaryRow.summaryPlacement = "group";
summaryRow.fields = sumFieldArray;
var summaryRow2:SummaryRow = new SummaryRow();
summaryRow2.summaryPlacement = "group";
summaryRow2.fields = sumFieldArray;
var groupField1:GroupingField = new GroupingField();
groupField1.name = "tavle";
//groupField1.summaries = [summaryRow2];
var groupField2:GroupingField = new GroupingField();
groupField2.name = "kategori";
groupField2.summaries = [summaryRow];
var group:Grouping = new Grouping();
group.fields = [groupField1, groupField2];
var groupCol:GroupingCollection2 = new GroupingCollection2();
groupCol.source = ressursTavle;
groupCol.grouping = group;
groupCol.refresh();
Main Question: How do i get my AdvancedDataGrid's (dg_Teknikktavles) root node "Tavle" to correctly display the sum of the two branch nodes below?
Side Question: How do i add a red color to the numbers of the root node's summary row that exceed 5? E.g the column displaying 8 will exceed 5 in the root node's summary row, and should therefore be marked red
Thanks in advance!
This is a general answer, without code examples, but I had to do the same just couple of days ago, so my memory is still fresh :) Here's what I did:
Created a class A to represent an item renderer data, extended it from Proxy (I had field names defined at run time), and let it contain a collection of values as it's data member. Once accessed through flash_proxy::getPropery(fieldName) it would find a corresponding value in the data member containing the values and return it. Special note: implement IUID, just do it, it'll save you couple of days of frustration.
Extended A in B, added a children property containing ArrayCollection of A (don't try to experiment with other collection types, unless you want to find yourself examining tons of framework code, trust me, it's ugly and is impossible to identify as interesting). Let B override flash_proxy::getPropery - depending of your compiler this may, or may not be possible, if not possible - call some function from A.flash_proxy::getPropery() that you can override in B. Let this function query every instance of A, which is a child of B, asking the same thing, as DataGrid itself would, when building item renderers - this way you would get the total.
When creating a data provider. Create an ArrayCollection of B (again, don't try to experiment with other collections--unless you are ready for lots of frustration). Create Hierarchical data that uses this array collection as a source.
Colors - that's what you use item renderers for, just look up any tutorial on using item renderers, that must be pretty basic.
In case someone else has the same problem:
The initial problem that everything was summed twice, was the result of using the same Array of SummaryField2 (sumFieldArray in the code) for both grouping fields(GropingField2 tavle and kategori)
The Solution to the main question: was to create a new array of summaryfields for the root node(in my intial for loop):
//Summary fields for root node
var sumFieldRoot:SummaryField2 = new SummaryField2();
sumFieldRoot.dataField = Ressurstavle.ressursKey + i;
sumFieldRoot.summaryOperation = "SUM";
sumFieldArrayRoot[i] = sumFieldRoot;
Answer to the side question:
This was pretty much as easy as pointed out by wvxyw. Code for this solution below:
private function summary_styleFunction(data:Object, col:AdvancedDataGridColumn):Object
{
var output:Object;
var field:String = col.dataField;
if ( data.children != null )
{
if(data[field] >5){
output = {color:0xFF0000, fontWeight:"bold"}
}
else {
output = {color:0x006633, fontWeight:"bold"}
}
//output = {color:0x081EA6, fontWeight:"bold", fontSize:14}
}
return output;
}