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Uses for Optional

...StuartMarks, this is one of the things that just baffles me when I hear it from all the Optional<> experts: "don't store Optional<> in a field". I'm truly trying to understand the point of this recommendation. Consider a DOM tree where a node could have a parent or not. It seems within t...
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Link to “pin it” on pinterest without generating a button

...: "At this point, I’m just going to copy & paste from another post because… time." -- obviously less than ideal. – Imperative Feb 24 '15 at 1:11 ...
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What's the difference between window.location= and window.location.replace()?

... the current document with the one at the provided URL. The difference from the assign() method is that after using replace() the current page will not be saved in session history, meaning the user won't be able to use the Back button to navigate to it. Oh and generally speaking: wi...
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What file uses .md extension and how should I edit them?

...ill find an edit button. You can preview your changes and even commit them from there. Since it is a text file, Notepad or Notepad++ (Windows), TextEdit (Mac) or any other text editor can be used to edit and modify it. Specialized editors exist that automatically parse the markdown as you type it a...
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npm: disable postinstall script for package

...le postinstall script while installing package? Or for rewriting any field from package.json? 4 Answers ...
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How to set up Android emulator proxy settings

... This menu has a reoccurring bug which is driving me nuts from mid 2017. Sometimes it works, sometimes not on the same AVD. Only re-creating the AVD could help reliably. At times the proxy falls off in the middle of a session! In the corporate environment that means I'm getting lock...
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How can I check if an ip is in a network in Python?

... I like to use netaddr for that: from netaddr import CIDR, IP if IP("192.168.0.1") in CIDR("192.168.0.0/24"): print "Yay!" As arno_v pointed out in the comments, new version of netaddr does it like this: from netaddr import IPNetwork, IPAddress if IP...
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What is meant by immutable?

...utable just by using the final keyword. final only prevents reassignment." from en.wikipedia.org/wiki/Immutable_object – Yousha Aleayoub Apr 17 '15 at 17:08 ...
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How to set a default value with Html.TextBoxFor?

Simple question, if you use the Html Helper from ASP.NET MVC Framework 1 it is easy to set a default value on a textbox because there is an overload Html.TextBox(string name, object value) . When I tried using the Html.TextBoxFor method, my first guess was to try the following which did not work...
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Couldn't connect to server 127.0.0.1:27017

...d before running mongo? I followed installation instructions for mongodb from http://docs.mongodb.org/manual/tutorial/install-mongodb-on-os-x/ and I had the same error as you only when I ran mongo before actually running the mongo process with mongod. I thought installing mongodb would also launch...