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What is the difference between a mutable and immutable string in C#?
...ing is immutable
i.e. strings cannot be altered. When you alter a string (by adding to it for example), you are actually creating a new string.
But StringBuilder is not immutable (rather, it is mutable)
so if you have to alter a string many times, such as multiple concatenations, then use StringB...
How to select Python version in PyCharm?
...tus bar
In case you cannot see the status bar, you can easily activate it by running the Find Action command (Ctrl+Shift+A or ⌘+ ⇧+A on mac). Then type status bar and choose View: Status Bar to see it.
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How does Trello access the user's clipboard?
...actually "access the user's clipboard", instead we help the user out a bit by selecting something useful when they press Ctrl+C.
Sounds like you've figured it out; we take advantage of the fact that when you want to hit Ctrl+C, you have to hit the Ctrl key first. When the Ctrl key is pressed, we p...
Avoid duplicates in INSERT INTO SELECT query in SQL Server
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Using ignore Duplicates on the unique index as suggested by IanC here was my solution for a similar issue, creating the index with the Option WITH IGNORE_DUP_KEY
In backward compatible syntax
, WITH IGNORE_DUP_KEY is equivalent to WITH IGNORE_DUP_KEY = ON.
Ref.: index_option
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C# - Selectively suppress custom Obsolete warnings
I'm using the Obsolete attribute (as just suggested by fellow programmers) to show a warning if a certain method is used.
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Can a program depend on a library during compilation but not runtime?
...hat provides the implementation.
Compile-time dependencies can be avoided by using reflection. For instance, a JDBC driver can be loaded with a Class.forName and the actual class loaded be configurable through a configuration file.
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Inline code in org-mode
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Yes, I recall having been disturbed by the "emphasis" term myself too, when looking for a feature allowing to hide org markup. Once you know the terminology, you immediately find org-hide-emphasis-markers, but I've searched for ages before finally finding it al...
Piping both stdout and stderr in bash?
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Side note about the shortcut |& proposed by @AdrianFrühwirth for future readers: this feature is only supported with bash version 4+. If you're using 3 or below, you have to stick with 2>&1 |.
– tomocafe
Apr 21 '14 at 1...
How do I get the type name of a generic type argument?
... some reason...), I'll give you the rep points for writing the best answer by far =)
– Tomas Aschan
Apr 5 '10 at 23:49
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Get all column names of a DataTable into string array using (LINQ/Predicate)
I know we can easily do this by a simple loop, but I want to persue this LINQ/Predicate?
4 Answers
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