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Mixins vs. Traits
... a year past date, but for future readers, in ruby it would use the method form the last module that was mixed in, so it would call foo() form MB
– rik.vanmechelen
Jan 12 '12 at 19:36
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What's a concise way to check that environment variables are set in a Unix shell script?
...
Parameter Expansion
The obvious answer is to use one of the special forms of parameter expansion:
: ${STATE?"Need to set STATE"}
: ${DEST:?"Need to set DEST non-empty"}
Or, better (see section on 'Position of double quotes' below):
: "${STATE?Need to set STATE}"
: "${DEST:?Need to set DEST n...
What is the difference between and ?
...e <p> for "paragraph of content", does the content have to be in the form of letters and words? Would you ever use <p> to describe some other type of content, like images?
– drs
Jun 11 '13 at 11:42
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What is the difference between the hidden attribute (HTML5) and the display:none rule (CSS)?
...kind of overflow presentation — one could equally well just show all the form controls in one big page with a scrollbar. It is similarly incorrect to use this attribute to hide content just from one presentation — if something is marked hidden, it is hidden from all presentations, including, for...
how do I strip white space when grabbing text with jQuery?
...would be a clearer pattern (the "i" is redundant and the ' ' is an unusual form - also fwiw a pattern of /(^\s*)|(\s*$)/g is equivalent to trim.
– annakata
Dec 18 '08 at 10:04
1
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What are the nuances of scope prototypal / prototypical inheritance in AngularJS?
...nce is normally straightfoward... until you need 2-way data binding (i.e., form elements, ng-model) in the child scope. Ng-repeat, ng-switch, and ng-include can trip you up if you try to bind to a primitive (e.g., number, string, boolean) in the parent scope from inside the child scope. It doesn't...
What is the difference between RDF and OWL? [closed]
...s of "Knows".
RDF Serialisations
RDF can be exported in a number of file formats. The most common is RDF+XML but this has some weaknesses.
N3 is a non-XML format which is easier to read, and there's some subsets (Turtle and N-Triples) which are stricter.
It's important to know that RDF is a way ...
Why use iterators instead of array indices?
...
The first form is efficient only if vector.size() is a fast operation. This is true for vectors, but not for lists, for example. Also, what are you planning to do within the body of the loop? If you plan on accessing the elements as...
send Content-Type: application/json post with node.js
...t',
url:'https://www.googleapis.com/urlshortener/v1/url',
form: {name:'hello',age:25},
headers: headersOpt,
json: true,
}, function (error, response, body) {
//Print the Response
console.log(body);
});
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What is Cache-Control: private?
... GMT
Because the browser knows the date the file was modified, it can perform a conditional request. It will ask the server for the file, but instruct the server to only send the file if it has been modified since 2012/10/16 3:13:38:
GET / HTTP/1.1
If-Modified-Since: Tue, 16 Oct 2012 03:13:38 GMT...