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How to represent multiple conditions in a shell if statement?
...he parentheses aren't needed because the precedence of -a and -o makes it correct even without them.
Note that the -a and -o operators are part of the POSIX specification for test, aka [, mainly for backwards compatibility (since they were a part of test in 7th Edition UNIX, for example), but they ...
Enumerable.Empty() equivalent for IQueryable
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Unfortunately that doesn't create an actual empty IQueryable, which means it causes e.g. Union queries to be broken up into multiple queries instead of one.
– NetMage
May 22 '17 at 23:11
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Compare if BigDecimal is greater than zero
...ple as:
if (value.compareTo(BigDecimal.ZERO) > 0)
The documentation for compareTo actually specifies that it will return -1, 0 or 1, but the more general Comparable<T>.compareTo method only guarantees less than zero, zero, or greater than zero for the appropriate three cases - so I typic...
Make absolute positioned div expand parent div height
As you can see in the CSS below, I want child2 to position itself before child1 . This is because the site I'm currently developing should also work on mobile devices, on which the child2 should be at the bottom, as it contains the navigation which I want below the content on the mobile devices...
STL or Qt containers?
What are the pros and cons of using Qt containers ( QMap , QVector , etc.) over their STL equivalent?
14 Answers
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What is difference between instantiating an object using new vs. without
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By contrast:
Time* t = new Time(12, 0, 0);
... allocates a block of memory by calling either ::operator new() or Time::operator new(), and subsequently calls Time::Time() with this set to an address within that memory block (and also returned as the result of new), which is then stored in t. As ...
Best practice for Python assert
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To be able to automatically throw an error when x become less than zero throughout the function. You can use class descriptors. Here is an example:
class LessThanZeroException(Exception):
pass
class variable(object):
def __init__(self, value=0):
s...
“An exception occurred while processing your request. Additionally, another exception occurred while
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First, set customErrors = "Off" in the web.config and redeploy to get a more detailed error message that will help us diagnose the problem. You could also RDP into the instance and browse to the site from IIS locally to view the errors.
<sy...
AngularJS - convert dates in controller
...ld anyone please suggest me how to convert date from this 1387843200000 format into this 24/12/2013 inside my controller ?
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How to upgrade PostgreSQL from version 9.6 to version 10.1 without losing data?
I'm using the PostgreSQL database for my Ruby on Rails application (on Mac OS X 10.9).
15 Answers
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