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How do I make a column unique and index it in a Ruby on Rails migration?
...1 for suggesting continuing to use the validates_uniqueness_of. The error handling is much cleaner using this method for the cost of a single indexed query I would suggest he does both
– Steve Weet
Sep 19 '09 at 22:08
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Loop through files in a folder using VBA?
...'# LoopThroughFiles
'# Function to Loop through files in current directory and return filenames
'# Usage: LoopThroughFiles ActiveWorkbook.Path, "txt" 'inputDirectoryToScanForFile
'# https://stackoverflow.com/questions/10380312/loop-through-files-in-a-folder-using-vba
'###############################...
Java “lambda expressions not supported at this language level”
I was testing out some new features of Java 8 and copied the example into my IDE (Eclipse originally, then IntelliJ) as shown here
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Regex, every non-alphanumeric character except white space or colon
... letters
^ - negates them all - so you get - non numeric chars, non spaces and non colons
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What are the differences between Rust's `String` and `str`?
Why does Rust have String and str ? What are the differences between String and str ? When does one use String instead of str and vice versa? Is one of them getting deprecated?
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DateTime.ToString() format that can be used in a filename or extension?
...d but most of the DateTime methods I've tried output something with spaces and slashes. For instance:
8 Answers
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@Scope(“prototype”) bean scope not creating new bean
...ean or dependency injection) for an instance it will create a new instance and give a reference to that.
In your example a new instance of LoginAction is created and injected into your HomeController . If you have another controller into which you inject LoginAction you will get a different instanc...
How to import load a .sql or .csv file into SQLite?
...ame>
To import from a CSV file you will need to specify the file type and destination table:
sqlite> .mode csv <table>
sqlite> .import <filename> <table>
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Minimal web server using netcat
.../1.1 200 OK\n\n $(date)"'; done
The -cmakes netcat execute the given command in a shell, so you can use echo. If you don't need echo, use -e. For further information on this, try man nc. Note, that when using echo there is no way for your program (the date-replacement) to get the browser request. ...
warning: [options] bootstrap class path not set in conjunction with -source 1.5
..._HOME/jre/lib/rt.jar" Main.java
Tested on Ubuntu 14.04 for Oracle Java 7 and 8.
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