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How to remove item from list in C#?
...It will remove the items 2 and 3 and keep the items 1 and 4 - as specified by the removeList. Note that this happens in place, so there is no additional assigment required.
Of course, you can also use it on single items like:
results.RemoveAll(r => r.ID==4);
where it will remove Bill with ID 4 i...
How to show the text on a ImageButton?
...k"
android:text="OK"/>
You can put the drawable wherever you want by using: drawableTop, drawableBottom, drawableLeft or drawableRight.
UPDATE
For a button this too works pretty fine. Putting android:background is fine!
<Button
android:id="@+id/fragment_left_menu_login"
androi...
What's the $unwind operator in MongoDB?
...
Let's understand it by an example
This is how the company document looks like:
The $unwind allows us to take documents as input that have an array valued field and produces output documents, such that there's one output document for each el...
Mysql error 1452 - Cannot add or update a child row: a foreign key constraint fails
...you should update before creating the constraint so you won't be surprised by queries that should return values that should exist!
– Armfoot
Nov 19 '15 at 22:13
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Binding a WPF ComboBox to a custom list
...to be due to an NHibernate/WPF compatibility issue. The problem was caused by the way WPF checks for object equality. I was able to get my stuff to work by using the object ID property in the SelectedValue and SelectedValuePath properties.
<ComboBox Name="CategoryList"
DisplayMemberPat...
What is the difference between shallow copy, deepcopy and normal assignment operation?
...lists are references. For the inner lists, would the copied one influenced by original one? I create a list of lists like list_=[[1,2],[3,4]] newlist = list_.copy() list_[0]=[7,8] and the newlist remains the same, so does the inner list are references?
– Alston
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Difference between filter and filter_by in SQLAlchemy
Could anyone explain the difference between filter and filter_by functions in SQLAlchemy?
Which one should I be using?
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How can I use Spring Security without sessions?
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@workerjoe So, what you are trying to say by this java configuration, the sessions are not created by spring security rather tomcat?
– Vishwas Atrey
May 8 at 20:50
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generate model using user:references vs user_id:integer
...r:references adds the line belongs_to :user in the Micropost model and hereby declares as a foreign key.
FYI
Declaring the foreign keys using the former method only lets the Rails know about the relationship the models/tables have. The database is unknown about the relationship. Therefore when you ...
Group a list of objects by an attribute : Java
...gt;> studlistGrouped =
studlist.stream().collect(Collectors.groupingBy(w -> w.stud_location));
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