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Meaning of $? (dollar question mark) in shell scripts

...about to do vendor/bin/drush status bootstrap | grep -q $(vendor/bin/drush php-eval 'if (function_exists("t")) echo t("Successful");') &> /dev/null;. If I had to put that in a single line if [ ... ] it would be terribly unreadable. I plan to store the output of that line to a variable so I ca...
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WAMP 403 Forbidden message on Windows 7

...m all Allow from 127.0.0.1 </Directory> The same goes for your PHPMyAdmin access, the config file is phpmyadmin.conf : <Directory "c:/wamp/apps/phpmyadmin3.4.5/"> Options Indexes FollowSymLinks MultiViews AllowOverride all Order Deny,Allow Deny from all ...
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Stretch and scale a CSS image in the background - with CSS only

...e with all browsers. I do this dynamically for each page. Therefore I use PHP to generate its own HTML tag for each page. All the pictures are in the 'image' folder and end with 'Bg.jpg'. <html style=" background: url(images/'.$pic.'Bg.jpg) no-repeat center center fixed; -webkit-bac...
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Why am I getting an OPTIONS request instead of a GET request?

... I had the same problem. My fix was to add headers to my PHP script which are present only when in dev environment. This allows cross-domain requests: header("Access-Control-Allow-Origin: *"); This tells the preflight request that it is OK for the client to send any headers it ...
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Changing one character in a string

...explicitly to avoid trouble. Everything is machine-oriented. I worked with PHP before learning Python, and that language is a total mess. Regarding your note on fast CPUs I'm totally with you. But a part of that problem is the popular disapproval of premature optimization, which leads to slow interp...
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C++ project organisation (with gtest, cmake and doxygen)

... pmrpmr 52.4k99 gold badges9898 silver badges144144 bronze badges 2 ...
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MySQL select 10 random rows from 600K rows fast

...d 2Gb size. See here my code: Fast selection of random rows in MySQL <?php $time= microtime_float(); $sql='SELECT COUNT(*) FROM pages'; $rquery= BD_Ejecutar($sql); list($num_records)=mysql_fetch_row($rquery); mysql_free_result($rquery); $sql="SELECT id FROM pages WHERE RAND()*$num_records<2...
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How to compare two floating point numbers in Bash?

...thon. You have perl installed by default on many Linux/Unix systems.. even php also – anubhava Jul 19 '17 at 15:44 1 ...
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What is Python used for? [closed]

...s not specialised to a specific target of users (like R for statistics, or PHP for web programming). It is extended through modules and libraries, that hook very easily into the C programming language. Python enforces correct indentation of the code by making the indentation part of the syntax. Ther...
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What Ruby IDE do you prefer? [closed]

... I tend to use Aptana exclusively for PHP/Ruby development, and standard Eclipse for JAVA, C, C++ etc. This prevents me from dealing with pointless warnings. – Zee Spencer Jun 18 '10 at 14:40 ...