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How to do a safe join pathname in ruby?
My Rails development environment is Windows-based, and my production environment is Linux-based.
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XPath to select element based on childs child value
...her
./book[author/name = 'John']
or
./book[./author/name = 'John']
and you will match your element. Your current predicate goes back to the root of the document to look for an author.
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Scope of sessionStorage and localStorage
I read some documentation on sessionStorage and localStorage, but I don't understand what the scope is: the domain, a specific page?
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How do I ALTER a PostgreSQL table and make a column unique?
..._constraint UNIQUE ((payload::text), name);
– writofmandamus
Oct 6 '17 at 22:22
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Rename an environment with virtualenvwrapper
I have an environment called doors and I would like to rename it to django for the virtualenvwrapper .
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What is the difference between origin and upstream on GitHub?
What is the difference between origin and upstream on GitHub ?
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ListBox vs. ListView - how to choose for data binding
...r a ListView for a WPF application. It seems either supports data binding and item templates. My application has a simple list of items that I intend to be able to search/sort/filter based on user input. The data binding demo ( http://msdn.microsoft.com/en-us/library/ms771319.aspx ) uses a ListBo...
How do I change column default value in PostgreSQL?
...able name, only that table is altered. If ONLY is not specified, the table and all its descendant tables (if any) are altered" postgresql.org/docs/9.3/static/sql-altertable.html
– Yodan Tauber
Dec 20 '15 at 8:41
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Scala: join an iterable of strings
...Strings.mkString(",")
A variant exists in which you can specify a prefix and suffix too.
See here for an implementation using foldLeft, which is much more verbose, but perhaps worth looking at for education's sake.
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C++: variable 'std::ifstream ifs' has initializer but incomplete type
...is is pretty noobish, but I'm pretty new to C++. I'm trying to open a file and read it using ifstream :
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