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Why are data transfer objects (DTOs) an anti-pattern?
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Some projects have all data twice. Once as domain objects, and once as data transfer objects.
This duplication has a huge cost, so the architecture needs to get a huge benefit from this separation to be worth it.
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Update a record without first querying?
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@Gabriel Won't this update all properties though? What if I only want to modify a single one?
– David Pfeffer
Aug 15 '12 at 0:45
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Can I have multiple primary keys in a single table?
...re UNIQUE, taken together, and also NOT NULL. Thus, specifying values for all the columns of any candidate key is enough to determine that there is one row that meets the criteria, or no rows at all.
Candidate keys are a fundamental concept in the relational data model.
It's common practice, if m...
What is a simple command line program or script to backup SQL server databases?
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There's a good script to backup all user databases in one go here: mssqltips.com/tip.asp?tip=1070
– Marnix van Valen
Sep 22 '09 at 14:47
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Clear Application's Data Programmatically
I want to clear my application's data programmatically.
6 Answers
6
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Loader lock error
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If I run the project as Native debugging, with all exceptions on default (reset all), the debug window shows <mda:msg xmlns:mda="schemas.microsoft.com/CLR/2004/10/mda"> <!-- Attempting managed execution inside OS Loader lock.... etc --> <mda...
How do I iterate through each element in an n-dimensional matrix in MATLAB?
...ar index for arrays in matlab is an important one. An array in MATLAB is really just a vector of elements, strung out in memory. MATLAB allows you to use either a row and column index, or a single linear index. For example,
A = magic(3)
A =
8 1 6
3 5 7
4 9 2
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EC2 Instance Cloning
Is it possible to clone a EC2 instance data and all?
7 Answers
7
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Invalid date format specification in gemspec
...update --system
Edit: You can also try (as suggested by ZeissS)
gem install rubygems-update
update_rubygems
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Comment shortcut Android Studio
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Mac With Numeric pad
Line Comment hold both: Cmd + /
Block Comment hold all three: Cmd + Alt + /
Mac
Line Comment hold both: Cmd + + =
Block Comment hold all three: Cmd + Alt + + =
Windows/linux :
Line Comment hold both: Ctrl + /
Block Comment hold all three: Ctrl + Shift + /
Same way to rem...