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What is the difference between IEqualityComparer and IEquatable?
I want to understand the scenarios where IEqualityComparer<T> and IEquatable<T> should be used.
The MSDN documentation for both looks very similar.
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SQL statement to get column type
Is there a SQL statement that can return the type of a column in a table?
22 Answers
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How do I drop a function if it already exists?
I know this must be simple, but how do I preface the creation of a function with a check to see if it already exists? If it exists, I want to drop and re-create it.
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Selecting only numeric columns from a data frame
Suppose, you have a data.frame like this:
11 Answers
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Why use the params keyword?
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With params you can call your method like this:
addTwoEach(1, 2, 3, 4, 5);
Without params, you can’t.
Additionally, you can call the method with an array as a parameter in both cases:
addTwoEach(new int[] { 1, 2, 3, 4, 5 })...
Casting a variable using a Type variable
In C# can I cast a variable of type object to a variable of type T where T is defined in a Type variable?
12 Answers
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Best practice: PHP Magic Methods __set and __get [duplicate]
These are simple examples, but imagine you have more properties than two in your class.
9 Answers
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Remove everything after a certain character
... to remove everything after a certain character or just choose everything up to that character? I'm getting the value from an href and up to the "?", and it's always going to be a different amount of characters.
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Mongoose.js: Find user by username LIKE value
...ke to to go find a user in mongoDb by looking for a user called value.
The problem with:
13 Answers
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Jump to matching XML tags in Vim
Vim % operator jumps to matching parentheses, comment ends and a few other things. It doesn't, however, match XML tags (or any other tag, to the best of my knowledge).
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