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Is there any difference between the `:key => “value”` and `key: “value”` hash notations?

...Hash keys are "simple" symbols (more or less something that matches /\A[a-z_]\w*\z/i, AFAIK the parser uses its label pattern for these keys). The :$in style symbols show up a fair bit when using MongoDB so you'll end up mixing Hash styles if you use MongoDB. And, if you ever work with specific key...
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Specifying and saving a figure with exact size in pixels

...for an example. Here's how to show an 800x800 pixel image in my monitor (my_dpi=96): plt.figure(figsize=(800/my_dpi, 800/my_dpi), dpi=my_dpi) So you basically just divide the dimensions in inches by your DPI. If you want to save a figure of a specific size, then it is a different matter. Screen...
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can we use xpath with BeautifulSoup?

...VResult.html" response = requests.get(url, stream=True) response.raw.decode_content = True tree = lxml.html.parse(response.raw) Of possible interest to you is the CSS Selector support; the CSSSelector class translates CSS statements into XPath expressions, making your search for td.empformbody tha...
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What's the difference between URI.escape and CGI.escape?

...pe has been deprecated in Ruby 1.9.2... so use CGI::escape or ERB::Util.url_encode. There is a long discussion on ruby-core for those interested which also mentions WEBrick::HTTPUtils.escape and WEBrick::HTTPUtils.escape_form. ...
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Is it possible to register a http+domain-based URL Scheme for iPhone apps, like YouTube and Maps?

... } } ,100); function LaunchApp(){ window.open("unknown://nowhere","_self"); }; LaunchApp() </script> </body> </html>
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The best way to remove duplicate values from NSMutableArray in Objective-C?

... edited May 14 '13 at 8:53 DD_ 6,5791111 gold badges3535 silver badges6060 bronze badges answered May 14 '13 at 8:35 ...
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In Markdown, what is the best way to link to a fragment of a page, i.e. #some_id?

...sure why this isn't the accepted answer. – kayleeFrye_onDeck Nov 16 '16 at 22:02 Defining old style anchors <a name...
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Assign width to half available screen width declaratively

... If your widget is a Button: <LinearLayout android:layout_width="fill_parent" android:layout_height="wrap_content" android:weightSum="2" android:orientation="horizontal"> <Button android:layout_width="0dp" android:layout_height="wrap_content" ...
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A variable modified inside a while loop is not remembered

...ere: for line in $(echo -e $lines); do ... done – dma_k Jan 19 '16 at 20:20 @dma_k Thanks for your comment! This solut...
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RESTful Authentication via Spring

...rity:custom-filter ref="authenticationTokenProcessingFilter" position="FORM_LOGIN_FILTER" /> <security:intercept-url pattern="/authenticate" access="permitAll"/> <security:intercept-url pattern="/**" access="isAuthenticated()" /> </security:http> <bean id="CustomAuth...