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How do I get the full path to a Perl script that is executing?

...me of the script during execution. I discovered that depending on how you call the script $0 varies and sometimes contains the fullpath+filename and sometimes just filename . Because the working directory can vary as well I can't think of a way to reliably get the fullpath+filename of the scr...
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JavaScript Regular Expression Email Validation [duplicate]

... If you define your regular expression as a string then all backslashes need to be escaped, so instead of '\w' you should have '\\w'. Alternatively, define it as a regular expression: var pattern = /^\w+@[a-zA-Z_]+?\.[a-zA-Z]{2,3}$/; BTW, please don't validate email address...
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What do (lambda) function closures capture?

...the name and scope of the variable, not the object it's pointing to. Since all the functions in your example are created in the same scope and use the same variable name, they always refer to the same variable. EDIT: Regarding your other question of how to overcome this, there are two ways that com...
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Printf width specifier to maintain precision of floating-point value

...ier which can be applied to a floating point specifier that would automatically format the output to the necessary number of significant digits such that when scanning the string back in, the original floating point value is acquired? ...
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how to use javascript Object.defineProperty

...rs = new Product("Sneakers",20); sneakers.discount = 50; // 50, setter is called sneakers.discount+= 20; // 70, setter is called sneakers.discount+= 20; // 80, not 90! alert(sneakers.discount); // getter is called Note the last but one line: the responsibility for correct discount value was moved ...
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How to split a string literal across multiple lines in C / Objective-C?

... There are two ways to split strings over multiple lines: Using \ All lines in C can be split into multiple lines using \. Plain C: char *my_string = "Line 1 \ Line 2"; Objective-C: NSString *my_string = @"Line1 \ Line2"; Better approach Th...
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Getting SyntaxError for print with keyword argument end=' '

...print ("foo" % bar, end=" ") or print "foo" % bar, end=" " i.e. as a call to print with a tuple as argument. That's obviously bad syntax (literals don't take keyword arguments). In Python 3.x print is an actual function, so it takes keyword arguments, too. The correct idiom in Python 2.x for ...
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How to fix “Attempted relative import in non-package” even with __init__.py

...ry to execute the above shell command, the fact that you need __init__.pys all the way down, and the __package__-modifying trickery (described below by BrenBarn) needed to allow these imports for executable scripts (e.g. when using a shebang and doing ./my_script.py at the Unix shell) would all be u...
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How to import other Python files?

... importlib was added to Python 3 to programmatically import a module. It is just a wrapper around __import__, see the docs. import importlib moduleName = input('Enter module name:') importlib.import_module(moduleName) Note: the .py extension should be removed from mod...
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How to search a specific value in all tables (PostgreSQL)?

... at 11:55 Mike Sherrill 'Cat Recall'Mike Sherrill 'Cat Recall' 78.5k1616 gold badges103103 silver badges156156 bronze badges ...