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What does the thread_local mean in C++11?

I am confused with the description of thread_local in C++11. My understanding is, each thread has unique copy of local variables in a function. The global/static variables can be accessed by all the threads (possibly synchronized access using locks). And the thread_local variables are visible to...
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Pandas: Setting no. of max rows

...max_rows: pd.set_option('display.max_rows', 500) For older versions of pandas (<=0.11.0) you need to change both display.height and display.max_rows. pd.set_option('display.height', 500) pd.set_option('display.max_rows', 500) See also pd.describe_option('display'). You can set an option on...
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How to send a correct authorization header for basic authentication

... You can include the user and password as part of the URL: http://user:passwd@www.server.com/index.html see this URL, for more HTTP Basic Authentication credentials passed in URL and encryption of course, you'll need the username password, it's n...
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Is the safe-bool idiom obsolete in C++11?

This answer of @R. Martinho Fernandes shows, that the safe-bool idiom is apperently deprecated in C++11, as it can be replaced by a simple ...
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How to make --no-ri --no-rdoc the default for gem install?

... or RDoc output from the gems I install in my machine or in the servers I handle (I use other means of documentation). 12 A...
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What's the difference between __PRETTY_FUNCTION__, __FUNCTION__, __func__?

... the difference between __PRETTY_FUNCTION__ , __FUNCTION__ , __func__ , and where are they documented? How do I decide which one to use? ...
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How do I read any request header in PHP

... // Replace XXXXXX_XXXX with the name of the header you need in UPPERCASE (and with '-' replaced by '_') $headerStringValue = $_SERVER['HTTP_XXXXXX_XXXX']; ELSE IF: you run PHP as an Apache module or, as of PHP 5.4, using FastCGI (simple method): apache_request_headers() <?php $headers = apa...
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Coding in Other (Spoken) Languages

This is something I've always wondered, and I can't find any mention of it anywhere online. When a shop from, say Japan, writes code, would I be able to read it in English? Or do languages, like C, PHP, anything, have Japanese translations that they write? ...
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Why can't I save CSS changes in Firebug? [closed]

...ile (on my local development machine). Unfortunately after searching a lot and not finding anything that suits my needs (OK, there's CSS Updater but you have to register and it's a paid extension...) I gave up on Firefox + Firebug and looked for something similar for Google Chrome. Guess what... I j...
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Is char signed or unsigned by default?

... The book is wrong. The standard does not specify if plain char is signed or unsigned. In fact, the standard defines three distinct types: char, signed char, and unsigned char. If you #include <limits.h> and then look at CHAR_MIN, you can find...