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Get names of all keys in the collection
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You can use aggregation with the new $objectToArray aggregation operator in version 3.4.4 to convert all top key-value pairs into document arrays, followed by $unwind and $group with $addToSet to get distinct keys across the entire collection. (Use $$ROOT fo...
Declaring array of objects
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Use array.push() to add an item to the end of the array.
var sample = new Array();
sample.push(new Object());
To do this n times use a for loop.
var n = 100;
var sample = new Array();
for (var i = 0; i < n; i++)
sample.push(new Object());
Note that you can also substitute new Arra...
LINQ to Entities only supports casting EDM primitive or enumeration types with IEntity interface
...allows collection.FirstOrDefault() to run correctly as it likely returns a new instance of T calling a default ctor on a class based type.
– War
May 8 '19 at 13:03
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Spring .properties file: get element as an Array
...onProperties
public class Configuration {
List<String> values = new ArrayList<>();
public List<String> getValues() {
return values;
}
}
This is needed, without this class or without the values in class it is not working.
Spring Boot Application class
impo...
Using JQuery to check if no radio button in a group has been checked
...radio"><input id="job1" type="radio" name="job" value="1" checked>New Job</label>
<label class="radio"><input id="job2" type="radio" name="job" value="2">Updating Job</label>
<button type="button" class="btn btn-primary" onclick="save();">Save</button>
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Can I use view pager with views (not with fragments)
...super
}
}
// Set the ViewPager adapter
WizardPagerAdapter adapter = new WizardPagerAdapter();
ViewPager pager = (ViewPager) findViewById(R.id.pager);
pager.setAdapter(adapter);
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impro...
How to exclude a module from a Maven reactor build?
...instead you would have to change the CI configuration everytime there is a new module.
-pl,--projects <arg> Comma-delimited list of specified
reactor projects to build instead
of all projects. A project can...
Compare JavaScript Array of Objects to Get Min / Max
... This makes sense, I've been stuck with thinking about comparing data inside the array to each other instead of an external high/low number.
– firedrawndagger
Jan 14 '12 at 19:01
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Count Rows in Doctrine QueryBuilder
...You can borrow from Doctrine\ORM\Tools\Pagination\Paginator:
$paginator = new \Doctrine\ORM\Tools\Pagination\Paginator($query);
$totalRows = count($paginator);
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MySQL Error 1215: Cannot add foreign key constraint
I am trying to forward engineer my new schema onto my db server, but I can't figure out why I am getting this error. I've tried to search for the answer here, but everything I've found has said to either set the db engine to Innodb or to make sure the keys I'm trying to use as a foreign key are pri...