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String Concatenation using '+' operator

Looking at the string class metadata, I only see the operators == and != overloaded. So how is it able to perform concatenation for the ' + ' operator? ...
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Why do access tokens expire?

I am just getting started working with Google API and OAuth2. When the client authorizes my app I am given a "refresh token" and a short lived "access token". Now every time the access token expires, I can POST my refresh token to Google and they will give me a new access token. ...
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Converting pfx to pem using openssl

How to generate a .pem CA certificate and client certificate from a PFX file using OpenSSL. 3 Answers ...
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CSS hide scroll bar if not needed

...flow-y:scroll; if not needed. What I mean is that I am building a website and I have a main area which posts will be displayed and I want to hide the scroll bar if content does not exceed the current width. ...
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Oracle SELECT TOP 10 records

....YYYY') AS HISTORY_DATE FROM HISTORY WHERE STORAGE_GB IS NOT NULL AND APP_ID NOT IN (SELECT APP_ID FROM HISTORY WHERE TO_CHAR(HISTORY_DATE, 'DD.MM.YYYY') ='06.02.2009') ORDER BY STORAGE_GB DESC ) WHERE ROWNUM <= 10 Oracle applies rownum to the result after it has been returned...
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Bootstrap 3 Navbar Collapse

...cs/4.0/components/navbar/#responsive-behaviors You have to use .navbar-expand{-sm|-md|-lg|-xl} classes: <nav class="navbar navbar-expand-md navbar-light bg-light"> Bootstrap 3 @media (max-width: 991px) { .navbar-header { float: none; } .navbar-toggle { display:...
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Override Python's 'in' operator?

... Zoran, I agree, and I even upvoted this answer and not the other. I'm just pointing out that a truly good answer should always link to docs, if available. – Peter Hansen Aug 31 '12 at 21:55 ...
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Pull all commits from a branch, push specified commits to another

...'cherry pick'. That is, take a single commit from the middle of one branch and add it to another: A-----B------C \ \ D becomes A-----B------C \ \ D-----C' This, of course, can be done with the git cherry-pick command. The problem with this commit is that git considers commits to i...
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How to change a git submodule to point to a subfolder?

...ubmodule, you could always create a new repository that's cloned from boto and then set up a cron job to: git fetch that repository into a directory Use git filter-branch to update a branch where the subdirectory is at the top level. Add that branch of the repository as the submodule. However,...
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Possible to access the index in a Hash each loop?

...me thing as (key,value) = arr, putting the first value (the key) into key, and the second into value. – rampion Jan 18 '10 at 2:45 1 ...