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Shorthand way for assigning a single field in a record, while copying the rest of the fields?
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Yes, there's a nice way of updating record fields. In GHCi you can do --
> data Foo = Foo { a :: Int, b :: Int, c :: String } -- define a Foo
> let foo = Foo { a = 1, b = 2, c = "Hello" } -- create a Foo
> let updateFoo x = x { c = "...
How to read the database table name of a Model instance?
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Found the answer myself: the _meta attribute of an instance has the information:
model_instance._meta.db_table
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How to drop multiple columns in postgresql
I want to drop 200 columns in my table in PostgreSQL. I tried:
2 Answers
2
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Get line number while using grep
I am using grep recursive to search files for a string, and all the matched files and the lines containing that string are print on the terminal. But is it possible to get the line numbers of those lines too??
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How can I switch to a tag/branch in hg?
I followed the documentation in https://developer.mozilla.org/En/Developer_Guide/Source_Code/Mercurial
and downloaded FF source with:
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How do I write a short literal in C++?
Very basic question: how do I write a short literal in C++?
6 Answers
6
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How do I delete/remove a shell function?
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unset -f z
Will unset the function named z. A couple people have answered with:
unset z
but if you have a function and a variable named z only the variable will be unset, not the function.
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jQuery ID starts with
I am trying to get all elements with an id starting with some value. Below is my jQuery code. I am trying to use a JavaScript variable when searching for items. But it does not work. What am I missing below? So the id 'value' am searching is the value of the clicked element
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How to break out of a loop in Bash?
I want to write a Bash script to process text, which might require a while loop.
2 Answers
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Difference between OperationCanceledException and TaskCanceledException?
... between OperationCanceledException and TaskCanceledException ? If I am using .NET 4.5 and using the async / await keywords, which one should I be looking to catch?
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