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Requests — how to tell if you're getting a 404

... 320 Look at the r.status_code attribute: if r.status_code == 404: # A 404 was issued. Demo: ...
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mailto link multiple body lines

... You can use URL encoding to encode the newline as %0A. mailto:email@address.com?subject=test&body=type%20your%0Amessage%20here While the above appears to work in many cases, user olibre points out that the RFC governing the mailto URI scheme specifies that %0D%0A (carri...
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Why covariance and contravariance do not support value type

...ething of type object. – Steve Jul 20 at 14:03  |  show 3 more comments ...
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Can I have H2 autocreate a schema in an in-memory database?

... | edited Jul 9 '13 at 8:02 answered Mar 8 '11 at 5:05 Tho...
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Is it better to reuse a StringBuilder in a loop?

...ion { long time = System.currentTimeMillis(); for( int i = 0; i < 10000000; i++ ) { StringBuilder sb = new StringBuilder(); sb.append( "someString" ); sb.append( "someString2"+i ); sb.append( "someStrin4g"+i ); sb.append(...
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How to center a label text in WPF?

... bijubiju 15.7k66 gold badges5252 silver badges9090 bronze badges ...
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How would you implement an LRU cache in Java?

... 102 I like lots of these suggestions, but for now I think I'll stick with LinkedHashMap + Collectio...
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Set the selected index of a Dropdown using jQuery

...uery // sets selected index of a select box to the option with the value "0" $("select#elem").val('0'); // sets selected index of a select box to the option with the value "" $("select#elem").val(''); // sets selected index to first item using the DOM $("select#elem")[0].selectedIndex = 0; // ...
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Get the client's IP address in socket.io

... Okay, as of 0.7.7 this is available, but not in the manner that lubar describes. I ended up needing to parse through some commit logs on git hub to figure this one out, but the following code does actually work for me now: var io = requ...
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How do I add a path to PYTHONPATH in virtualenv

...e? – Jamie Marshall Jan 6 '19 at 23:08 you can also navigate to your virtual environment's site-packages folder and cr...