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D3 get previous element in .data()


D3 get previous element in .data()

By : user2955927
Date : November 22 2020, 10:48 AM
should help you out How can I get the value of the previous element of the dataset passed to .data() in d3? , You can get the value of previous element like this.
code :
var texts = svg.selectAll("text")
    .data(data)
    .enter()
    .append("text")
    .attr("x",function(d){ return d.x; })
    .attr("y",function(d){ return d.y; })
    .text(function(d){ return d.name; });

texts.attr(...,function(d,i){
         ......
         var prevData = texts.data()[i-1]; //check whether i>0 before this code
         .......
     });


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PHP - DOMDocument - Get the previous element and his data attributes

PHP - DOMDocument - Get the previous element and his data attributes


By : user3453854
Date : March 29 2020, 07:55 AM
hope this fix your issue I guess you could get the last values of start end with regex but that will not be using DOM.
code :
if (strpos($valuePTagFull,'<div') === false) {
                $valuePTagFull = "<div class='st' data-start=".$matches[1]." data-end=".$matches[2].">".$valuePTagFull."</div>";
            }
            else{
                preg_match('~<div[^>]*?class="ST"[^>]*?data-start="(\d*?)" data-end="(\d*?)">~',$valuePTagFull,$matches);
            }
            $TagFull .= $valuePTagFull;
Get previous element with specific data (ASP.NET MVC)

Get previous element with specific data (ASP.NET MVC)


By : Wp-expert
Date : March 29 2020, 07:55 AM
wish of those help You should use the Ticks property of the DateTime and pass it to a TimeSpan in order to get the time difference in minutes (TotalMinutes). For example:
code :
for(int i = 1; i < yourQuery.Count; i++){
    var differenceTicks = yourQuery[i].CurDateTime.Ticks - yourQuery[i-1].CurDateTime.Ticks;
    var differenceInMinutes = new TimeSpan(differenceTicks).TotalMinutes;
    // You can assign this value to any property within your list or 
    // to another list
} 
 var filteredQuery = query.Where(x=> x.DataType == 1 || x.DataType == 2);
var filteredQuery = query.Where(x=> x.DataType == 1 || x.DataType == 2).OrderByDescending(x=> x.id);
for(int i = 1; i < filteredQuery.Count; i++){
    if(filteredQuery[i].DataType == 2 && filteredQuery[i-1].DataType == 1){
        // Then calculate the difference as described 
    }
}
For each element in an array, if the element is less than its previous element, increase it till the previous element wi

For each element in an array, if the element is less than its previous element, increase it till the previous element wi


By : Jan Toť
Date : March 29 2020, 07:55 AM
I wish this helpful for you Suppose I have an array: list1 = [8, 5, 3, 1, 1, 10, 15, 9] Now if the element is less than its previous element, increase it till the previous element with one. , The following code will create a new list with the required output
code :
l1 = [8, 5, 3, 1, 1, 10, 15, 9]
l = [l1[0]]
c=[0]         # cost / difference list

for i in range(len(l1)-1):
    if l1[i+1] < l1[i]:
        l.append(l1[i]+1)
        c.append(l1[i]+1-l1[i+1])
    else:
        l.append(l1[i+1])
        c.append(0)
print(l)
[8, 9, 6, 4, 1, 10, 15, 16]
[0, 4, 3, 3, 0,  0,  0,  7]
Select data using getdate for previous day - but only return data for the previous day not previous 24 hours

Select data using getdate for previous day - but only return data for the previous day not previous 24 hours


By : Leandro Landim
Date : March 29 2020, 07:55 AM
this will help From the MSDN documentation, here is the expression for today at midnight:
code :
DATEADD(Day, 0, DATEDIFF(Day, 0, GetDate()))
SELECT
    UpdateOn = DATEADD(hh, DATEPART(hh, UpdateOn),
        CAST(CAST(UpdateOn AS DATE) AS DATETIME)),
    ROUND(AVG(P1Temp), 1)
FROM TABLE
WHERE
    UpdateOn >=
        DATEADD(day, -1, DATEADD(Day, 0, DATEDIFF(Day, 0, GetDate()))) AND
    UpdateOn < DATEADD(Day, 0, DATEDIFF(Day, 0, GetDate()))
GROUP BY
    DATEADD(hh, DATEPART(hh, UpdateOn),
        CAST(CAST(UpdateOn AS DATE) AS DATETIME));
Differentiate between the previous element and current element from the data of a Flatlist in react native

Differentiate between the previous element and current element from the data of a Flatlist in react native


By : LAVRENTIOS KONSTANTI
Date : March 29 2020, 07:55 AM
With these it helps Flatlist's renderItem prop provides an index property for the current rendering item. You can use index to find the previous item's sender is the same or not. To achieve this sort of behavior you need to have your data sorted.
For Example
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