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Entity Framework code first unique column
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In Entity Framework 6.1+ you can use this attribute on your model:
[Index(IsUnique=true)]
You can find it in this namespace:
using System.ComponentModel.DataAnnotations.Schema;
If your model field is a string, make sure it is not set to nvarchar(MAX) in SQL Server or you will see this er...
Find index of last occurrence of a substring in a string
I want to find the position (or index) of the last occurrence of a certain substring in given input string str .
9 Answers...
Angular ng-repeat Error “Duplicates in a repeater are not allowed.”
...w in [1,1,1]">
However, changing the above code slightly to define an index to determine uniqueness as below will get it working again.
// This will work
<div ng-repeat="row in [1,1,1] track by $index">
Official docs are here: https://docs.angularjs.org/error/ngRepeat/dupes
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How to remove element from array in forEach loop?
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}
var review = ['a', 'b', 'c', 'b', 'a'];
review.forEach(function(item, index, object) {
if (item === 'a') {
object.splice(index, 1);
}
});
log(review);
<pre id="out"></pre>
Which works fine for simple case where you do not have 2 of the same values as adjacent array i...
Application Error - The connection to the server was unsuccessful. (file:///android_asset/www/index.
...r situation.
The problem might be solved by adding a timeout to call your index.html
ie you need to add super.setIntegerProperty("loadUrlTimeoutValue", 70000); in your activity.java file ( inside src/com/yourProj/--/youractivity.java)
above this line: super.loadUrl("file:///android_asset/www/inde...
SQL Server - When to use Clustered vs non-Clustered Index?
I know primary differences between clustered and non clustered indexes and have an understanding of how they actually work. I understand how clustered and non-clustered indexes improve read performance. But one thing I am not sure is that what would be the reasons where I would choose one over the o...
php - get numeric index of associative array
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The indexes given by "array_keys" will not necessarily match the index of the original array. For example, if you have altered the array by using "unset" or a number of other functions, there will be a gap left in the index of th...
Can I have multiple primary keys in a single table?
... username OR a userid, without needing both. I guess RB's answer of unique indexes would do the trick there.
– Burrito
Dec 18 '17 at 16:30
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What's the difference between “git reset” and “git checkout”?
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git reset is specifically about updating the index, moving the HEAD.
git checkout is about updating the working tree (to the index or the specified tree). It will update the HEAD only if you checkout a branch (if not, you end up with a detached HEAD).
(actually, with Gi...
ElasticSearch: Unassigned Shards, how to fix?
...n.
# v0.90.x and earlier
curl -XPUT 'localhost:9200/_settings' -d '{
"index.routing.allocation.disable_allocation": false
}'
# v1.0+
curl -XPUT 'localhost:9200/_cluster/settings' -d '{
"transient" : {
"cluster.routing.allocation.enable" : "all"
}
}'
Elasticsearch will then re...