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Cannot push to Heroku because key fingerprint

I am new to Rails, and I was trying to deploy a very simple app to Heroku. This is the second app that I deploy, and the first one I was able to do it just fine. However I am having some issues with this one. Whenever I " git push heroku master ", I get this error: ...
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What is a magic number, and why is it bad? [closed]

...Now, what you do is you have the 50 in different places - your SQL script (SELECT TOP 50 * FROM orders), your Website (Your Last 50 Orders), your order login (for (i = 0; i < 50; i++)) and possibly many other places. Now, what happens when someone decides to change 50 to 25? or 75? or 153? You n...
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Include all existing fields and add new fields to document

...ne a $project aggregation stage where I can instruct it to add a new field and include all existing fields, without having to list all the existing fields. ...
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Canvas width and height in HTML5

Is it possible to fix the width and height of an HTML5 canvas element? 4 Answers 4 ...
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Having issue with multiple controllers of the same name in my project

...at the 4th parameter here can be a bit confusing because of type inference and variable meaning. The 4th parameter can be a string array to constrain by namespace, an object to add IRouteConstraints OR strings that can be interpreted as constraints, or you can have 5 parameters and include both. asp...
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搭建高可用mongodb集群(三)—— 深入副本集内部机制 - 大数据 & AI - 清...

...ervers are not up (from this server’s POV), remain in Secondary mode and stop. if the last op time seems very old, stop and await human intervention. else, using a consensus protocol, pick the server with the highest maxLocalOpOrdinal as the Primary. 大致翻译过来为使用一致...
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Setting Environment Variables for Node to retrieve

I'm trying to follow a tutorial and it says: 16 Answers 16 ...
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How to change the text on the action bar

Currently it just displays the name of the application and I want it to display something custom and be different for each screen in my app. ...
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廉价共享存储解决方案2-drbd+cman+gfs2 - 更多技术 - 清泛网 - 专注C/C++及内核技术

...s: a9:8a:3a:3d:64:eb:0b:de:94:a5:92:e4:ba:5d:f3:de root@gfs_1 The key's randomart image is: +--[ RSA 2048]----+ | | | | | | | . | | . . S | |o + + . | |.B =o . | |+oBo + . | |+*=+..o E ...
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Difference between Covariance & Contra-variance

...vide so-called “multiple dispatch” or multi methods (this is basically selecting function overloads at run time, e.g. with CLOS) or get the desired effect by using dynamic typing. share | improv...