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Why I can't change directories using “cd”?

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What is stdClass in PHP?

...nce. <?php //Example with StdClass $json = '{ "foo": "bar", "number": 42 }'; $stdInstance = json_decode($json); echo $stdInstance->foo . PHP_EOL; //"bar" echo $stdInstance->number . PHP_EOL; //42 //Example with associative array $array = json_decode($json, true); echo $array['foo'] . PHP_E...
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How to port data-only volumes from one host to another?

...E: # create a new data container $ sudo docker create -v /data --name DATA2 busybox true # untar the backup files into the new container᾿s data volume $ sudo docker run --rm --volumes-from DATA2 -v $(pwd):/backup busybox tar xvf /backup/backup.tar data/ data/sven.txt # compare to the original con...
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Vertically aligning CSS :before and :after content [duplicate]

... 128 Answered my own question after reading your advice on the vertical-align CSS attribute. Thanks ...
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What is the best way to ensure only one instance of a Bash script is running? [duplicate]

... [Terminal #1] $ lockfile -r 0 /tmp/the.lock [Terminal #1] $ [Terminal #2] $ lockfile -r 0 /tmp/the.lock [Terminal #2] lockfile: Sorry, giving up on "/tmp/the.lock" [Terminal #1] $ rm -f /tmp/the.lock [Terminal #1] $ [Terminal #2] $ lockfile -r 0 /tmp/the.lock [Terminal #2] $ After /tmp/the...
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Are HTTP cookies port specific?

... The current cookie specification is RFC 6265, which replaces RFC 2109 and RFC 2965 (both RFCs are now marked as "Historic") and formalizes the syntax for real-world usages of cookies. It clearly states: Introduction ... For historical reasons, c...
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Switching between Android Navigation Drawer image and Up caret when using fragments

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How to 'minify' Javascript code

... Production (19KB, Minified and Gzipped) , and the other is Development (120KB, Uncompressed Code) . 9 Answers ...
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Why is it slower to iterate over a small string than a small list?

... closer to 70% (or more) once a lot of the overhead is removed, for Python 2. Object creation is not at fault. Neither method creates a new object, as one-character strings are cached. The difference is unobvious, but is likely created from a greater number of checks on string indexing, with regards...
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DateTime to javascript date

... | edited Mar 8 '10 at 20:51 answered Mar 8 '10 at 19:55 ...