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Does Java have a HashMap with reverse lookup?
I have data that is organized in kind of a "key-key" format, rather than "key-value". It's like a HashMap, but I will need O(1) lookup in both directions. Is there a name for this type of data structure, and is anything like this included in Java's standard libraries? (or maybe Apache Commons?)
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How to get the instance id from within an ec2 instance?
How can I find out the instance id of an ec2 instance from within the ec2 instance?
32 Answers
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Entity Framework Code First - two Foreign Keys from same table
I've just started using EF code first, so I'm a total beginner in this topic.
6 Answers
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Redirecting Output from within Batch file
I am creating a batch file with some simple commands to gather information from a system. The batch file contains commands to get the time, IP information, users, etc.
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Concatenating string and integer in python
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Modern string formatting:
"{} and {}".format("string", 1)
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Font Awesome icon inside text input element
I am trying to insert a user icon inside username input field.
22 Answers
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Where is the itoa function in Linux?
itoa() is a really handy function to convert a number to a string. Linux does not seem to have itoa() , is there an equivalent function or do I have to use sprintf(str, "%d", num) ?
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Is it possible to use “/” in a filename?
...ay to use the slash character that normally separates directories within a filename in Linux?
6 Answers
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How to modify memory contents using GDB?
I know that we can use several commands to access and read memory: for example, print, p, x...
3 Answers
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What is the correct way to create a single-instance WPF application?
Using C# and WPF under .NET (rather than Windows Forms or console), what is the correct way to create an application that can only be run as a single instance?
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