So the following code will do a dump of the whole list every second.
var list = new List<object>();
for (int i = 0; i < 100; i++)
{
list.Add(new { A = i.ToString(), B = new Random().Next() });
list.Dump(); // How to DumpLatest()?
Thread.Sleep(1000);
}
But how can I make it to just update the dump output without adding a new one?
There is a related Q/A here but it doesn't work for me.
The DumpLatest() extension method only applies to IObservable<T>; there's no way to detect that an item is added to a List<T>, so LinqPad can't display the last value added.
Instead you can use a DumpContainer and change its content explicitly:
var list = new List<object>();
var container = new DumpContainer();
container.Dump();
for (int i = 0; i < 100; i++)
{
var item = new { A = i.ToString(), B = new Random().Next() };
list.Add(item);
container.Content = item;
Thread.Sleep(1000);
}
You could also achieve the same result with a Subject<T> (arguably more elegant):
var subject = new Subject<object>();
subject.DumpLatest();
for (int i = 0; i < 100; i++)
{
var item = new { A = i.ToString(), B = new Random().Next() };
subject.OnNext(item);
Thread.Sleep(1000);
}
EDIT: OK, I thought you wanted to see only the last item. To print the whole list, just use subject.Dump(), as mentioned by Joe in the comments. If you use the first approach, put the list itself in the DumpContainer, and call Refresh() on it in the loop.
Basically same with Thomas Levesque's answer, a little shorter.
Observable.Interval(TimeSpan.FromSeconds(1))
.Select(t=> new { A = t.ToString(), B = new Random().Next() })
.Take(100)
.Dump(); // all 100
//.DumpLatest(); //only latest one
Related
jslint tell Unexpected 'for'.
so i think that i must convert for with foreach
but how?
if someone can help
thanks
// Grab the original element
var original = document.getElementsByTagName("noscript")[0];
// Create a replacement tag of the desired type
var replacement = document.createElement("span");
var i;
// Grab all of the original's attributes, and pass them to the replacement
for(i = 0, l = original.attributes.length; i < l; ++i){
var nodeName = original.attributes.item(i).nodeName;
var nodeValue = original.attributes.item(i).nodeValue;
replacement.setAttribute(nodeName, nodeValue);
}
// Persist contents
replacement.innerHTML = original.innerHTML;
// Switch!
original.parentNode.replaceChild(replacement, original);
You have a comma after i = 0, <========
it should be semicolon.
Another issue is declaring l = original.attributes.length you don't need the variable l
just use it as for(i = 0; i < original.attributes.length; ++i){
if you still wanna use a forEach you can do it as:
original.attributes.forEach(element => {
var nodeName = element.nodeName;
var nodeValue = element.nodeValue;
replacement.setAttribute(nodeName, nodeValue);
});
thanks for your answer, i got Uncaught TypeError: original.attributes.forEach is not a function
function Switch() {
var original = document.getElementsByTagName("noscript")[0];
var replacement = document.createElement("span");
original.attributes.forEach(element => {
var nodeName = element.nodeName;
var nodeValue = element.nodeValue;
replacement.setAttribute(nodeName, nodeValue);
});
// Persist contents
replacement.innerHTML = original.innerHTML;
// Switch!
original.parentNode.replaceChild(replacement, original);
}
I've written a pretty simple script that successfully takes information from one sheet in a Google Spreadsheet, and replaces information in a column in another sheet in the same spreadsheet pending satisfaction of two criteria: the receiving row has the same "Customer ID" and "Product Type." I say "simple" because it's intuitive, but extremely computationally demanding (taking nearly 30 seconds to run!).
From what I've read online, it's the sequential read and write operations that are causing the slowdown. I'm assuming that if I sort the sheets in question on the two criteria and THEN do a function that writes over subsequent rows, I may be able to speed it up. I'm a little weak on algorithms, so I'm still scratching my head on how to do this elegantly.
Does anyone have any suggestions? Below is my original script, and I've already made sure that the spreadsheet collapses empty rows, so time isn't wasted iterating over nothing.
function replaceRawWithRepChanges(receivedSheet) {
var ss = SpreadsheetApp.openById(receivedSheet);
var repchanges = ss.getSheetByName('repchanges');
var rawSheet = ss.getSheetByName('Sheet1');
var rawTMtoReplace = rawSheet.getRange('P2:P');
var repCustID = repchanges.getRange('A1:A').getValues();
var repTM = repchanges.getRange('F1:F').getValues();
var repCategory = repchanges.getRange('G1:G').getValues();
var rawCustID = rawSheet.getRange('A2:A').getValues();
var rawTM = rawSheet.getRange('P2:P').getValues();
var rawCategory = rawSheet.getRange('U2:U').getValues();
var repInfo = [repCustID, repTM, repCategory];
var rawInfo = [rawCustID, rawTM, rawCategory];
for (var i=0; i < rawInfo[0].length; i++) {
for (var j=0; j < repInfo[0].length; j++) {
// var thisRawCust = rawInfo[0][i];
// var thisRepCust = repInfo[0][j];
if (rawInfo[0][i].toString() == repInfo[0][j].toString()) {
// var thisRawCategory = rawInfo[2][i];
// var thisRepCategory = repInfo[2][j];
if (rawInfo[2][i].toString() == repInfo[2][j].toString()) {
// var repvalue = repInfo[1][j];
rawInfo[1][i] = repInfo[1][j];
// var newRawValue = rawInfo[1][i];
}
}
}
}
return rawInfo[1];
}
Yes, you should sort the data (perhaps using the SORT command, which does work with multiple columns). Then, using two pointers, you only have to go down the columns once, rather than checking the entirety of repInfo for matches for every single row in rawInfo.
Once you've sorted the information, your loop might look like the following:
var i = 0;
var j = 0;
while (i < rawInfo[0].length && j < repInfo[0].length) {
if (rawInfo[0][i].toString() == repInfo[0][j].toString()) {
if (rawInfo[2][i].toString() == repInfo[2][j].toString()) {
rawInfo[1][i]=repInfo[1][j];
i++;
j++;
} else if (rawInfo[2][i].toString() < repInfo[2][j].toString()) {
i++;
} else {
j++;
}
} else if (rawInfo[0][i].toString() < repInfo[0][j].toString()) {
i++;
} else {
j++;
}
}
Here is my code
if (Count < LeaveTypeCount)
{
for (int i = 0; i < LeaveTypeCount; i++)
{
var LeaveId = from l in CompObj.LeaveTypes
select l.LeaveID;
var leaveIdArray = LeaveId.ToArray ();
var LeaveDefault = (from c in CompObj.LeaveTypes
where (c.LeaveID ==leaveIdArray[i])
select new { c.DefaultLeave }).FirstOrDefault();
Int32 DefaultCount = Convert.ToInt32(LeaveDefault.DefaultLeave);
AssignedLeave AddObj = new AssignedLeave();
AddObj.EmpID = EmpID;
AddObj.AssignedYear = LeaveYear;
AddObj.LeaveID =leaveIdArray[i];
AddObj.TotalLeave = DefaultCount;
CompObj.AssignedLeaves.AddObject(AddObj);
CompObj.SaveChanges();
}
}
but its showing error The LINQ expression node type 'ArrayIndex' is not supported in LINQ to Entities.
How can i resolve this issue or what is the another way to do this task
Thanks
You just need to copy the value to a local variable:
var leaveIdValue = leaveIdArray[i];
var LeaveDefault = (from c in CompObj.LeaveTypes
where (c.LeaveID ==leaveIdValue)
select new { c.DefaultLeave }).FirstOrDefault();
BTW, you should probably move leaveIdArray out of the loop, since it doesn't depend on the value of i.
I am using a telerik radcombobox for a drop down list inside a user control in a web forms application. I need to delete all the items in the box, let's say id is ddlVeihicleMake and repopulate it with a new list of item passed to the function. Here is an example of what I understand it should be like,
function addNewItems(selectRef, optionsArray, valuesArray) {
var combo = document.getElementById("ctl00_cpMain_ctl01_appRadPaneltabVehicleInformation_i0_i0_tabVehicleInformation_ddlVehicleMake_Input");
combo.get_items().clear();
for (var idx = 0; idx < optionsArray.length; idx++) {
if (valuesArray == "") {
var comboItem = new Telerik.Web.UI.RadComboBoxItem();
comboItem.set_text(optionsArray[idx]);
combo.trackChanges();
combo.get_items().add(comboItem);
} else {
var comboItem = new Telerik.Web.UI.RadComboBoxItem();
comboItem.set_text(optionsArray[idx]);
combo.trackChanges();
combo.get_items().add(comboItem);
}
}
It fails for me on get_items().clear() and get_itmes().add(comboItem). Appreciate any help I can get.
Thanks!
Try something like this:
function DeleteItems(sender, args)
{
var combo = window.$find("<%= cboMyComboBox.ClientID %>");
combo.trackChanges();
for (var i = 0; i < combo.get_items().get_count(); i++) {
combo.get_items().remove(combo.get_items().getItem(i));
}
combo.commitChanges();
}
I have an MVC application with a dynamic table on one of the pages, which the users defines how many columns the table has, the columns order and where to get the data from for each field.
I have written some very bad code in order to keep it dynamic and now I would like it to be more efficient.
My problem is that I don't know how to define the columns I should get back into my IEnumerable on runtime. My main issue is that I don't know how many columns I might have.
I have a reference to a class which gets the field's text. I also have a dictionary of each field's order with the exact property It should get the data from.
My code should look something like that:
var docsRes3 = from d in docs
select new[]
{
for (int i=0; i<numOfCols; i++)
{
gen.getFieldText(d, res.FieldSourceDic[i]);
}
};
where:
docs = List from which I would like to get only specific fields
res.FieldSourceDic = Dictionary in which the key is the order of the column and the value is the property
gen.getFieldText = The function which gets the entity and the property and returns the value
Obviously, it doesn't work.
I also tried
StringBuilder fieldsSB = new StringBuilder();
for (int i = 0; i < numOfCols; i++)
{
string field = "d." + res.FieldSourceDic[i] + ".ToString()";
if (!string.IsNullOrEmpty(fieldsSB.ToString()))
{
fieldsSB.Append(",");
}
fieldsSB.Append(field);
}
var docsRes2 = from d in docs
select new[] { fieldsSB.ToString() };
It also didn't work.
The only thing that worked for me so far was:
List<string[]> docsRes = new List<string[]>();
foreach (NewOriginDocumentManagment d in docs)
{
string[] row = new string[numOfCols];
for (int i = 0; i < numOfCols; i++)
{
row[i] = gen.getFieldText(d, res.FieldSourceDic[i]);
}
docsRes.Add(row);
}
Any idea how can I pass the linq the list of fields and it'll cut the needed data out of it efficiently?
Thanks, Hoe I was clear about what I need....
Try following:
var docsRes3 = from d in docs
select (
from k in res.FieldSourceDic.Keys.Take(numOfCols)
select gen.getFieldText(d, res.FieldSourceDic[k]));
I got my answer with some help from the following link:
http://www.codeproject.com/Questions/141367/Dynamic-Columns-from-List-using-LINQ
First I created a string array of all properties:
//Creats a string of all properties as defined in the XML
//Columns order must be started at 0. No skips are allowed
StringBuilder fieldsSB = new StringBuilder();
for (int i = 0; i < numOfCols; i++)
{
string field = res.FieldSourceDic[i];
if (!string.IsNullOrEmpty(fieldsSB.ToString()))
{
fieldsSB.Append(",");
}
fieldsSB.Append(field);
}
var cols = fieldsSB.ToString().Split(',');
//Gets the data for each row dynamically
var docsRes = docs.Select(d => GetProps(d, cols));
than I created the GetProps function, which is using my own function as described in the question:
private static dynamic GetProps(object d, IEnumerable<string> props)
{
if (d == null)
{
return null;
}
DynamicGridGenerator gen = new DynamicGridGenerator();
List<string> res = new List<string>();
foreach (var p in props)
{
res.Add(gen.getFieldText(d, p));
}
return res;
}