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How to determine a user's IP address in node

...= require('ipware')().get_ip; app.use(function(req, res, next) { var ipInfo = getIP(req); console.log(ipInfo); // { clientIp: '127.0.0.1', clientIpRoutable: false } next(); }); It will make the best attempt to get the user's IP address or returns 127.0.0.1 to indicate that it could...
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nginx - nginx: [emerg] bind() to [::]:80 failed (98: Address already in use)

...ke this: listen 80; listen [::]:80 ipv6only=on default_server; For more information, see: http://forum.linode.com/viewtopic.php?t=8580 http://wiki.nginx.org/HttpCoreModule#listen share | improv...
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STL or Qt containers?

... Your points are largely valid, but there is some misleading info in there: Adding an unnecessary level of abstraction on top of an already stable and usable interface? Not my idea of "easier". Qt's Java-style iterators weren't added onto C++11; they predate it. Anyway Qt's foreach(QSt...
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Handle ModelState Validation in ASP.NET Web API

...t the request was successful. Imagine a site where your user will add some info about themselves via an AJAX POST request. What if the information they have tried to entered isn't valid - how will they know if their Save action was successful or not? The best way to do this is using Good Old HTTP S...
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JavaScript get clipboard data on paste event (Cross browser)

... Some more info on this: Firefox won't allow you to move focus to another element in the paste event, however it will allow you to clear the contents of the element (and save it to a variable so you can restore it later). If this contai...
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Why is std::map implemented as a red-black tree?

... Missing from all this is the cost, per-node, to store the auxilary information required to make balance decisions. Red-Black trees require 1-bit to represent the colour. AVL trees require at least 2 bits (to represent -1, 0 or 1). – SJHowe Sep 12 '17 at...
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Access index of the parent ng-repeat from child ng-repeat

.../ul> </ul> Plunker: http://plnkr.co/edit/knwGEnOsAWLhLieKVItS?p=info share | improve this answer | follow | ...
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Groovy Shell warning “Could not open/create prefs root node …”

... wanting the system preferences, but that is very rarely the case. Bonus info The bug did not reveal itself in versions prior to Java 1.7.21, because up until then the JRE installer would create Registry key HKEY_LOCAL_MACHINE\Software\JavaSoft\Prefs for you and this would effectively hide the bu...
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How to use double or single brackets, parentheses, curly braces

...t ([) usually actually calls a program named [; man test or man [ for more info. Example: $ VARIABLE=abcdef $ if [ $VARIABLE == abcdef ] ; then echo yes ; else echo no ; fi yes The double bracket ([[) does the same thing (basically) as a single bracket, but is a bash builtin. $ VARIABLE=abcdef $...
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Simple state machine example in C#?

...y text at the correct places. E.g. within ExecuteOnEntry. If you need more info then ask a new Question and state exactly your problem as this is getting off topic here. – Remo Gloor Nov 12 '12 at 12:30 ...