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Android App Not Install. An existing package by the same name with a conflicting signature is alread

...om another SDK, the keys will definitely be different. Also if you don't know exactly what key was used before to sign the apk and yet you want to install the new version of your app, you can just uninstall the previous application and reinstall the new one. Hope this Helps... Regards! ...
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Can I have multiple :before pseudo-elements for the same element?

... normal element. In your example, the end result looks like this: .circle.now:before { content: "Now"; font-size: 19px; color: black; } As you can see, only the content declaration that has highest precedence (as mentioned, the one that comes last) will take effect — the rest of the...
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git pull fails “unable to resolve reference” “unable to update local ref”

... Try cleaning-up your local repository with: $ git gc --prune=now $ git remote prune origin man git-gc(1): git-gc - Cleanup unnecessary files and optimize the local repository git gc [--aggressive] [--auto] [--quiet] [--prune=<date> | --no-prune] Runs a number of hou...
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Inserting a Link to a Webpage in an IPython Notebook

... Its wierd, any of these options doesnt work, if the text in Markdown cell Starts with a tab. ie if there is more than 4 spaces in the starting of the cell, then it simply does'nt work – sjd Jul 17 at 6:21 ...
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javascript toISOString() ignores timezone offset [duplicate]

... trying to convert Twitter datetime to a local iso-string (for prettyDate) now for 2 days. I'm just not getting the local time right.. ...
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How to change a nullable column to not nullable in a Rails migration?

I created a date column in a previous migration and set it to be nullable. Now I want to change it to be not nullable. How do I go about doing this assuming there are null rows in that database? I'm ok with setting those columns to Time.now if they're currently null. ...
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Best way to add Activity to an Android project in Eclipse?

...n Ubuntu 10.04. When the add dialog comes up, it has two selections... No, now only one "Create a new element at the top level, in Application." Ne;low that there is a text entry field and below that, a box with selections for Activity, Activity Alias, Meta Data and so on. Below that there are butto...
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How to access a preexisting collection with Mongoose?

... Mongoose added the ability to specify the collection name under the schema, or as the third argument when declaring the model. Otherwise it will use the pluralized version given by the name you map to the model. Try something like the following, either schem...
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Should .nuget folder be added to version control?

...uGet 4.x and .NET Standard 2.0, when you use the new csproj format you can now use package references, ironically reintroducing the dependency on msbuild to restore packages, but now packages are a first class citizen of msbuild. The link above also makes mention of the PackageReference, but the fo...
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Difference between

...at you can only read from it and you'll get a T or subclass of T. super Now consider List <? super T>. The wildcard declaration of List<? super Integer> foo3 means that any of these are legal assignments: List<? super Integer> foo3 = new ArrayList<Integer>(); // Integer...