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Linq code to select one item
...throws. First() and FirstOrDefault() stop on the first match, so they are more efficient.
Of the First() and Single() family, here's where they throw:
First() - throws if empty/not found, does not throw if duplicate
FirstOrDefault() - returns default if empty/not found, does not throw if duplica...
Questions every good .NET developer should be able to answer? [closed]
...many categories, each category has many posts, and each post can belong to more than one category. Ask your applicant to write queries to pull specific information out.
Next, look for specific technical know-how:
(Event handlers) Create a class with a custom event handler, create another class w...
Why does this method print 4?
... get into main, the space left over is X-M. Each recursive call takes up R more memory. So for 1 recursive call (1 more than original), the memory use is M + R. Suppose that StackOverflowError is thrown after C successful recursive calls, that is, M + C * R <= X and M + C * (R + 1) > X. At the...
Add one row to pandas DataFrame
...l overwrite existing rows, or insert rows, or create gaps in your index. A more robust (but not fool-proof) approach for appending an existing nonzero-length dataframe would be: df.loc[df.index.max() + 1] = [randint(... or prepopulating the index as @FooBar suggested.
– hobs
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Split string every nth character?
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How can I debug javascript on Android?
...s://developers.google.com/chrome-developer-tools/docs/remote-debugging for more information.
Update: JavaScript Console
You can also navigate to about:debug in the URL bar to activate the debug menu and the JavaScript error console with recent Android devices. You should see SHOW JAVASCRIPT CONS...
What is the difference between window, screen, and document in Javascript?
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What are the advantages of using a schema-free database like MongoDB compared to a relational databa
...your schema.
A clear path to horizontal scalability.
You'll need to read more about it and play with it to get a better idea. Here's an online demo:
http://try.mongodb.org/
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What are the best practices for catching and re-throwing exceptions?
...$connect->disconnect(); // we don't want to keep the connection open anymore
throw $e; // but we also don't know how to respond to the failure
}
PHP 5.5 has introduced the finally keyword, so for cleanup scenarios there is now another way to approach this. If the cleanup code needs to run n...
JavaScript: filter() for Objects
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