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Unique Constraint in Entity Framework Code First
...his isn't just a problem with unique constraints... you may want to create indexes, check constraints, and possibly triggers and other constructs too. Here's a simple pattern you can use with your code-first setup, though admittedly it's not database agnostic:
public class MyRepository : DbContext...
Explain which gitignore rule is ignoring my file
...anism does not take effect on paths that are already tracked.
With "--no-index" option, it can be used to diagnose which paths that should have been ignored have been mistakenly added to the index.
See commit 8231fa6 from https://github.com/flashydave:
check-ignore currently shows how .gitig...
Issue with adding common code as git submodule: “already exists in the index”
...t error means that projectfolder is already staged ("already exists in the index"). To find out what's going on here, try to list everything in the index under that folder with:
git ls-files --stage projectfolder
The first column of that output will tell you what type of object is in the index a...
SQL Server 2005 How Create a Unique Constraint?
...t to do it from a Database Diagram:
right-click on the table and select 'Indexes/Keys'
click the Add button to add a new index
enter the necessary info in the Properties on the right hand side:
the columns you want (click the ellipsis button to select)
set Is Unique to Yes
give it an appropriate...
How can I delete all of my Git stashes at once?
... delete one of the stashed changes from stash area
git stash drop stash@{index} // here index will be shown after getting stash list.
Note : git stash list enables you to get index from stash area of git.
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How to output loop.counter in python jinja template?
...
The counter variable inside the loop is called loop.index in jinja2.
>>> from jinja2 import Template
>>> s = "{% for element in elements %}{{loop.index}} {% endfor %}"
>>> Template(s).render(elements=["a", "b", "c", "d"])
1 2 3 4
See http://jinja...
Installing Python packages from local file system folder to virtualenv with pip
... is called --find-links option.
Though you might need to generate a dummy index.html for your local package index which lists the links to all packages. This tool helps:
https://github.com/wolever/pip2pi
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How to make rounded percentages add up to 100%
...equence = original
.Zip(Enumerable.Range(0, int.MaxValue), (x, index) => new { x, index })
.OrderBy(a => original[a.index] - rounded[a.index])
.ThenByDescending(a => a.index)
.Select(a => a.index).ToList();
}
else
{
appl...
Performance difference for control structures 'for' and 'foreach' in C#
...uld all depend upon how the enumerator is implemented versus how the lists indexer is implemented. As it turns out the enumerator for types based on arrays are normally written something like this:
private static IEnumerable<T> MyEnum(List<T> list)
{
for (int i = 0; i < list.Coun...
How to iterate through SparseArray?
...a SparseArray (for Android) ? I used sparsearray to easily get values by index. I could not find one.
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