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MySQL join with where clause
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user_category_subscriptions.category_id = categories.category_id
and user_category_subscriptions.user_id =1
See, with an inner join, putting a clause in the join or the where is equivalent. However, with an outer join, they are vastly different.
As a join condition, you specify the rows...
ActiveRecord.find(array_of_ids), preserving order
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.ids works fine for me, and is pretty fast activerecord documentation
– TheJKFever
Jul 8 '15 at 15:26
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Why does Popen.communicate() return b'hi\n' instead of 'hi'?
...someone explain why the result I want, "hi", is preceded with a letter 'b' and followed with a newline?
4 Answers
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Set focus on textbox in WPF
... Focused element is readonly right How can you set in xaml? I used this and it did not work <Style.Triggers> <Trigger Property="Validation.HasError" Value="True"> <Setter Property="FocusManager.FocusedEleme...
Get the string representation of a DOM node
Javascript: I have the DOM representation of a node (element or document) and I'm looking for the string representation of it. E.g.,
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How do I redirect with JavaScript? [duplicate]
...s probably better practice because browser policies might restrict its use and block it since .location and .location.href are not exactly the same. However in some cases using .location is ideal particularly if you're using same origin policies like an iframe.
– phpvillain
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How to get current relative directory of your Makefile?
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It needs to have the value expanded immediately so the := operator should be used. As in mkfile_path := and current_dir = (otherwise the right side values could be evaluated later when the MAKEFILE_LIST has changed after other Makefiles were included
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What is the `sensor` parameter for in the Google Places API?
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Edit: The sensor parameter is no longer required, and will now be ignored if it's used.
The parameter doesn't impact the results. It's a parameter that Google is required to collect for Google's data providers who charge differently based on whether the request uses a senso...
unix domain socket VS named pipes?
After looking at a unix named socket and i thought they were named pipes. I looked at name pipes and didnt see much of a difference. I saw they were initialized differently but thats the only thing i notice. Both use the C write/read function and work alike AFAIK.
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How do I programmatically change file permissions?
In Java, I'm dynamically creating a set of files and I'd like to change the file permissions on these files on a linux/unix file system. I'd like to be able to execute the Java equivalent of chmod . Is that possible Java 5? If so, how?
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