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How to combine multiple conditions to subset a data-frame using “OR”?

... Note: I want to thank the anonymous contributor that attempted to fix the error in the code immediately above, a fix that got rejected by the moderators. There was actually an additional error that I noticed when I was correcting the first one. The conditional clause that checks for NA values needs...
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Convert from MySQL datetime to another format with PHP

... its error.. Class 'App\Controller\DateTime' not found ..using php 6.4 – aswzen Nov 26 '17 at 11:49 ...
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How to get size of mysql database?

... Note: MySQL Workbench will spit out a Syntax error: {column title} (double quoted text) is not valid input here. error. The column titles should be wrapped in tick marks. I.e. Database Name. – KareemElashmawy Jul 17 '17 at 22:15 ...
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What is the exact problem with multiple inheritance?

I can see people asking all the time whether multiple inheritance should be included into the next version of C# or Java. C++ folks, who are fortunate enough to have this ability, say that this is like giving someone a rope to eventually hang themselves. ...
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How do I edit /etc/sudoers from a script?

...he following output: visudo: unable to run /tmp/edit_sudoers: Exec format error visudo: /etc/sudoers.tmp unchanged – Jose Diaz-Gonzalez Oct 25 '13 at 5:58 ...
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How can I view an old version of a file with Git?

... try it? For "git show HEAD:path/to/file.c", I get an "ambiguous argument" error. – mike Dec 3 '08 at 20:06 2 ...
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How to format Joda-Time DateTime to only mm/dd/yyyy?

...is listing should be in their own docs but you have to do it via trial and error in your own code to see what each format looks like. This is super helpful. – Joshua Pinter Aug 28 at 2:13 ...
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git selective revert local changes from a file

... This seems to fail a lot for me when discarding changes ("error: patch failed <file>", "error: <file> patch does not apply"). Strangely enough I'll receive those errors when using the a option in patch mode to discard an entire file, yet git checkout -- <file> work...
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How do you reset the stored credentials in 'git credential-osxkeychain'?

...password, add it then pushes a file for that. After git push I found this error. Then I use the upper case- issue: remote: Permission to user1/file.git denied to user2(previously exist user ). fatal: unable to access 'https://github.com/xxxxxxxxxxxx/': The requested URL returned error: 403...
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File Upload ASP.NET MVC 3.0

... _SQLReader.Read(); } catch (Exception e) { // log errors here } } } // this method will be called as part of the Stream ímplementation when we try to write to our VarbinaryStream class. public override void Write(byte[] buffer, int index, int count) { try { i...