semantics

What is the length property of the Function, Array, and Object constructors?

由 帅比萌擦擦* 提交于 2019-12-10 04:33:28
问题 What is length static property of Function,Array and Object constructor? Static methods makes sense but what about length static property? Object.getOwnPropertyNames(Array) ["length", "name", "arguments", "caller", "prototype", "isArray"] Object.getOwnPropertyNames(Function) ["length", "name", "arguments", "caller", "prototype"] Note: I am getting answers about length property of Function.prototype that is not asked here. Object.getOwnPropertyNames(Function.prototype) ["length", "name",

How to recursively expand blank nodes in SPARQL construct query?

由 雨燕双飞 提交于 2019-12-09 14:57:36
问题 There is probably an easy to answer to this, but I can't even figure out how to formulate the Google query to find it. I'm writing SPARQL construct queries against a dataset that includes blank nodes. So if I do a query like CONSTRUCT {?x ?y ?z .} WHERE {?x ?y ?z .} Then one of my results might be: nm:John nm:owns _:Node Which is a problem if all of the _:Node nm:has nm:Hats triples don't also get into the query result somehow (because some parsers I'm using like rdflib for Python really don

SWRL tab in Protege 4

由 元气小坏坏 提交于 2019-12-09 04:18:39
问题 The protege SWRL tab is not available in Protege 4 versions, I have tried both protege 4.1 and protege 4.2. The axiome plugin mentioned to edit the SWRL rules in protege has been said to work only in protege 3 versions. Can anyone tell me plugins or procedure to include the plugin to edit SWRL rules in protege? 回答1: SWRL rules can be edited in Protégé 4, but not with a nice interface like in Protégé 3. If you go to menu Window -> Views -> Ontology views, there is an option Rules. Select it

How does seq force functions?

由 不问归期 提交于 2019-12-09 04:13:26
问题 Background This question arises from a challenge Brent Yorgey posed at OPLSS: write a function f :: (Int -> Int) -> Bool that distinguishes f undefined from f (\x -> undefined) . All of our answers either used seq or something like bang patterns that desugar into seq . For example: f :: (Int -> Int) -> Bool f g = g `seq` True *Main> f undefined *** Exception: Prelude.undefined *Main> f (\x -> undefined) True The GHC commentary on seq says that e1 `seq` e2 used to desugar into case e1 of { _ -

What is the difference between Pass and None in Python

由 不羁岁月 提交于 2019-12-08 19:12:13
问题 I would personally like to know the semantic difference between using Pass and None. I could not able to find any difference in execution. PS: I could not able to find any similar questions in SO. If you find one, please point it out. Thanks! 回答1: pass is a statement . As such it can be used everywhere a statement can be used to do nothing. None is an atom and as such an expression in its simplest form. It is also a keyword and a constant value for “nothing” (the only instance of the NoneType

Why should I use UL/LI in my HTML?

由 本秂侑毒 提交于 2019-12-08 16:59:00
问题 I have the following structure that seems really nice for me and I always use HTML5: <div class="drop-menu" data-dropmenu="language"> <a href="language/pt-pt" class="drop-menu-link">Português <span>(Brasil)</span></a> <a href="language/pt-pt" class="drop-menu-link">Português <span>(Portugal)</span></a> <a href="language/es" class="drop-menu-link">Español</a> <a href="language/en" class="drop-menu-link">English</a> <a href="language/ja" class="drop-menu-link">日本語</a> <a href="language/it"

formal method to do semantic analysis in compiler

由 可紊 提交于 2019-12-08 14:11:37
I know there is a formalism called attribute grammar,and a non-formalism method called syntax-directed translation,but the first is inefficient and the latter one is difficult to automate. Does there exist other recent formalism about semantic analysis? OP suggests "attribute grammars" are inefficient, and syntax-directed translation is difficult to automate. I offer a proof-point showing otherwise, name a few other semantic systems, and suggest how they might be integrated, below. Our DMS Software Reengineering Toolkit supports both of these activities and more. It provides parsers for full

Difference between heading inside section or before it in HTML5

由 孤人 提交于 2019-12-08 07:14:55
问题 In HTML5, what is the difference between a section with a h eading as child element and a section which is the next sibling of a h eading element? Does the same difference hold for div elements instead of section ? <section> <h1>First section</h1> <!-- other content --> </section> <!-- vs. --> <h1>Second section</h1> <section> <!-- other content --> </section> 回答1: The answers will highly depend upon logical view. <section> <h1>....</h1> </section> On the above case <h1> denotes the heading

Is the semantic of the data integral part of REST?

由 北城余情 提交于 2019-12-08 04:58:52
问题 This is a follow up on a question asking for an explanation of REST. As you can see from the comments to my answer, we've had a small argument with Darrel Miller on the best media representation of the resources. We've had a further email discussion that resulted in this question. The main difference between Darrel's and mine understanding of REST is whether the semantic of the data is part of the REST API. Darrel believes (my interpretation of his words :-)) that the semantic of the data is

Semantic meaning of writing functions

由 放肆的年华 提交于 2019-12-07 16:31:20
问题 We can write functions in 2 ways: var v1 = m1('hello'); // error var v2 = m2('hello'); // OK var m1 = function(param){ // ... return param; } function m2(param){ // ... return param; } var v1 = m1('hello'); // OK var v2 = m2('hello'); // OK As I know there is only one difference - time of creation : m2 in compilation time, so we can use it 'before' declaration - like in my case. m1 in assignment time (code goes line by line) and we cannot use it before. Is one more efficient for memory or
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