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Difference between Dictionary and Hashtable [duplicate]
...eneric dictionary, you must implement your own synchronization or (in .NET 4.0) use ConcurrentDictionary<TKey, TValue>.
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What are the performance characteristics of sqlite with very large database files? [closed]
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248
So I did some tests with sqlite for very large files, and came to some conclusions (at least fo...
How do I make a column unique and index it in a Ruby on Rails migration?
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The short answer for old versions of Rails (see other answers for Rails 4+):
add_index :table_name, :column_name, unique: true
To index multiple columns together, you pass an array of column names instead of a single column name,
add_index :table_name, [:column_name_a, :column_name_b], unique...
Convert Int to String in Swift
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Converting Int to String:
let x : Int = 42
var myString = String(x)
And the other way around - converting String to Int:
let myString : String = "42"
let x: Int? = myString.toInt()
if (x != nil) {
// Successfully converted String to Int
}
Or if you're usi...
How do I add spacing between columns in Bootstrap?
...lass="col-md-5 col-md-offset-2"></div>
</div>
In Bootstrap 4 use: offset-2 or offset-md-2
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is it possible to `git status` only modified files?
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answered Apr 4 '12 at 20:26
Lily BallardLily Ballard
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What's the meaning of interface{}?
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194
You can refer to the article "How to use interfaces in Go" (based on "Russ Cox’s description o...
Ignore python multiple return value
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Brian ClapperBrian Clapper
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bundle install fails with SSL certificate verification error
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WillWill
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How do you round a float to two decimal places in jruby
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steenslagsteenslag
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