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Select distinct using linq [duplicate]
... is iterated. When you call ToList it actually walks the entire enumerable forcing all of the work to be done up front. (And may take a little while if your enumerable is infinitely long.)
The flipside to this advice is that each time you enumerate such an IEnumerable the work to evaluate it has to...
How to concatenate strings of a string field in a PostgreSQL 'group by' query?
I am looking for a way to concatenate the strings of a field within a group by query. So for example, I have a table:
14 An...
How to set space between listView Items in Android
...retty much hit the nail on the head, but I just wanted to add a bit of XML for anyone maybe floating in here later via google:
<ListView android:id="@+id/MyListView"
android:layout_height="match_parent"
android:layout_width="match_parent"
android:divider="@android:color/transparent"
andr...
How to order by with union in SQL?
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Not working for me. The one with UNION ALL still fails to maintain the order within the first SELECT.
– Amit Chigadani
Apr 18 '18 at 11:29
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How to put Google Maps V2 on a Fragment using ViewPager
...However, I can't implement google maps v2 on it. I searched the internet for hours already, but I can't find a tutorial on how to do it. Can some one please show me how?
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Android: Tabs at the BOTTOM
...ut_weight="1"
Set TabWidget's android:layout_weight="0" (0 is default, but for emphasis, readability, etc)
Set TabWidget's android:layout_marginBottom="-4dp" (to remove the bottom divider)
Full code:
<?xml version="1.0" encoding="utf-8"?>
<TabHost xmlns:android="http://schemas.android.co...
How to search by key=>value in a multidimensional array in PHP
...ray[$key] == $value) {
$results[] = $array;
}
foreach ($array as $subarray) {
$results = array_merge($results, search($subarray, $key, $value));
}
}
return $results;
}
$arr = array(0 => array(id=>1,name=>"cat 1"),
1 =&g...
Best way to store a key=>value array in JavaScript?
...};
myArray.id3 = 400;
myArray["id4"] = 500;
You can loop through it using for..in loop:
for (var key in myArray) {
console.log("key " + key + " has value " + myArray[key]);
}
See also: Working with objects (MDN).
In ECMAScript6 there is also Map (see the browser compatibility table there):
An ...
Set value of hidden field in a form using jQuery's “.val()” doesn't work
I've been trying to set the value of a hidden field in a form using jQuery, but without success.
16 Answers
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Sequence contains no matching element
I have an asp.net application in which I am using linq for data manipulation. While running, I get the exception "Sequence contains no matching element".
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