becko

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May 21	revised	Efficient setting of properties of multiple vertices in Graph added 466 characters in body
May 21	comment	Efficient setting of properties of multiple vertices in Graph I +1 @LeonidShifrin comments because I think he gets what I am asking for, although I see that my question did not pin-point it. I should also clarify that I am interested in modifying individual vertex properties, not "global graph" properties. I +1 both answers because they do contain useful information, even though I had already tried what they suggested.
May 21	comment	Efficient setting of properties of multiple vertices in Graph I had tried similar approaches. What I was looking for was an alternative that didn't involve several distinct calls to `SetProperty` or `PropertyValue`, perhaps by avoiding those functions altogether and doing some rule-replacement combo on the Graph directly. Why isn't something like that implemented in Mathematica?
May 21	comment	Property assignment on a graph vertex using PropertyValue does not work inside a function @SjoerdC.deVries Ok. Now I almost got it. Except for the fact that now I don't understand how `PropertyValue` works, since it doesn't have a `HoldFirst` attribute: `Attributes[PropertyValue]` returns `{Protected}`. To me it looks contrary to the behavior that you explain, but I guess I'm missing something ... ??
May 21	awarded	Nice Question
May 21	comment	Property assignment on a graph vertex using PropertyValue does not work inside a function @SjoerdC.deVries I just realized I have one more question. What does a `Graph` object evaluate to? I thought they were atomic. Why do I have to put a `HoldFirst`? When I create a function that takes as argument an `Integer`, I'll just use `f[x_Integer]`, and I don't have to put a `HoldFirst`. So, if `Graph` is atomic, shouldn't it behave in the same way?
May 21	comment	Resources for beautiful Mathematica Stylesheets In the existing stylesheets for mathematical documents (such as Article), I have a nasty issue with numbered formulas: When the number identifying the formula is large (say three digits), for some reason it doesn't fit and gets broken into two lines, which is VERY ugly. (I am too lazy to go through the trouble of creating & maintaining a new question for this issue right now, so I'll just say it here. It is related to the current question anyways.)
May 21	comment	Resources for beautiful Mathematica Stylesheets +1 I am interested in seeing answers for this one. In particular, I would like to know about alternative stylesheets for mathematical documents (i.e., documents containing lots of inline and display formulas).
May 21	awarded	Nice Question
May 20	comment	What's wrong with this pattern of the form Except[Repeated[…]]? @Rojo I can't test the speed right now either, but will do it soon and post here.
May 20	comment	Efficient setting of properties of multiple vertices in Graph @Ajasja I think the version-8 tag is important here. Especially because in Mathematica 8 there are three distinct ways of dealing with graphs: two are the `Combinatorica` package and the `GraphPlot` et al, which have been there at least since version 6; the other is the `Graph` object, which is new to version 8. The tag graphs-and-networks alone would not make this distinction.
May 20	comment	What's wrong with this pattern of the form Except[Repeated[…]]? I accepted @Rojo answer before because, as you say, it's the neatest solution to the how question. But you're right that your answer is the only one that truly fits my question.
May 20	accepted	What's wrong with this pattern of the form Except[Repeated[…]]?
May 20	asked	Efficient setting of properties of multiple vertices in Graph
May 20	comment	Property assignment on a graph vertex using PropertyValue does not work inside a function @SjoerdC.deVries Got it.
May 20	accepted	Property assignment on a graph vertex using PropertyValue does not work inside a function
May 20	comment	Property assignment on a graph vertex using PropertyValue does not work inside a function It works. But then I tried using `board_Graph` instead of `board_ /; Head[board] === Graph` and it didn't work. Why?
May 20	comment	What's wrong with this pattern of the form Except[Repeated[…]]? "`Except` is a single argument, not a sequence." ... So that explains why my code doesn't work. But then, is there some sort of `SequenceExcept` in Mathematica?
May 20	comment	What's wrong with this pattern of the form Except[Repeated[…]]? @Rojo As you say, I just need a wrapper, so that when I pattern match something like `_Mol`, I can be sure that it is formatted in the correct way.
May 20	comment	What's wrong with this pattern of the form Except[Repeated[…]]? where Mol1 is defined with Heike's method and Mol2 is defined with your method. I get `{{0., Null}, {0.015, Null}}`.