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val-mutable versus var-immutable in Scala
...s finding the duplicates.
You should strive for referential transparency. What that means is that, if I have an expression "e", I could make a val x = e, and replace e with x. This is the property that mutability break. Whenever you need to make a design decision, maximize for referential transpare...
How to convert an IPv4 address into a integer in C#?
...dress into an Integer. Bonus points available for a function that will do the opposite.
21 Answers
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Weird behavior with objects & console.log [duplicate]
...shotted when logged, value below was evaluated just now.
to let you know what you're looking at.
One trick for logging in these cases is to log the individual values:
console.log(obj.foo, obj.bar, obj.baz);
Or JSON encode the object reference:
console.log(JSON.stringify(obj));
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Multi-key dictionary in c#? [duplicate]
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Many good solutions here,
What I am missing here is an implementation based on the build in Tuple type, so I wrote one myself.
Since it just inherits from Dictionary<Tuple<T1,T2>, T> you can always use both ways.
var dict = new Dictionar...
git remove merge commit from history
...arate branches again. You can then squash the purple independently and do whatever other manipulations you want without the merge commit in the way.
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How to add percent sign to NSString
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The code for percent sign in NSString format is %%. This is also true for NSLog() and printf() formats.
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Sockets: Discover port availability using Java
...f the objective is to create a ServerSocket listening to some port, that's what it should do, and return the ServerSocket. Creating it and then closing it and returning it provides zero guarantee that a subsequent ServerSocket can be created using that port. Ditto for DatagramSocket.
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How can I rename a field for all documents in MongoDB?
...rename:{"name.additional":"name.last"}}, false, true);
Or to just update the docs which contain the property:
db.foo.update({"name.additional": {$exists: true}}, {$rename:{"name.additional":"name.last"}}, false, true);
The false, true in the method above are: { upsert:false, multi:true }. You n...
Why and when to use Node.js? [duplicate]
Sorry if I'm a bit ambiguous, but I'm trying to understand the real advantages of using Node.js instead of other server-side language.
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Viewing complete strings while debugging in Eclipse
While debugging Java code, Strings in the views "Variables" and "Expressions" show up only till a certain length, after which Eclipse shows "..."
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