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When do we need curly braces around shell variables?

...o unconditionally required when: expanding array elements, as in ${array[42]} using parameter expansion operations, as in ${filename%.*} (remove extension) expanding positional parameters beyond 9: "$8 $9 ${10} ${11}" Doing this everywhere, instead of just in potentially ambiguous cases, can be ...
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Linux error while loading shared libraries: cannot open shared object file: No such file or director

... 142 Update While what I write below is true as a general answer about shared libraries, I think the...
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How to do something to each file in a directory with a batch script

... yoel halb 9,76633 gold badges4242 silver badges4444 bronze badges answered Oct 7 '08 at 22:51 Franci PenovFranci Penov ...
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Is it possible to focus on a using JavaScript focus() function?

... any idea ? – Haseeb Akhtar Feb 5 '14 at 5:20 It doesn't work in some Chrome versions... However, @vinoths solution do...
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Add swipe to delete UITableViewCell

...oving the data from your array and updating the tableview) } } Swift 4.2 func tableView(_ tableView: UITableView, canEditRowAt indexPath: IndexPath) -> Bool { return true } func tableView(_ tableView: UITableView, commit editingStyle: UITableViewCell.EditingStyle, forRowAt indexPath: ...
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Can I set an opacity only to the background image of a div?

...; right: 0; background: url(test.jpg) center center; opacity: .4; width: 100%; height: 100%; } See test case on jsFiddle :before and ::before pseudo-element Another trick is to use the CSS 2.1 :before or CSS 3 ::before pseudo-elements. :before pseudo-element is supported in I...
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How to shuffle a std::vector?

... user703016user703016 34.2k77 gold badges7878 silver badges104104 bronze badges ...
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What are the use cases for selecting CHAR over VARCHAR in SQL?

...verhead) VARCHAR(100) = 8 bytes (2 bytes of overhead) CHAR(10) = 10 bytes (4 bytes of waste) The bottom line is CHAR can be faster and more space-efficient for data of relatively the same length (within two characters length difference). Note: Microsoft SQL has 2 bytes of overhead for a VARCHAR. Th...
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How to import a Python class that is in a directory above?

... 184 from ..subpkg2 import mod Per the Python docs: When inside a package hierarchy, use two dots, a...
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How to get index of object by its property in JavaScript?

... | edited Aug 4 '16 at 9:08 silverlight513 3,28722 gold badges1919 silver badges3232 bronze badges ...