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How does one make an optional closure in swift?
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Also, from the Swift book: “When declaring an optional type, be sure to use parentheses to properly scope the ? operator. As an example, to declare an optional array of integers, write the type annotation as (Int[])?; writing Int...
Performance - Date.now() vs Date.getTime()
... t1 = Date.now();
var t2 = new Date().getTime();
However, the time value from any already-created Date instance is frozen at the time of its construction (or at whatever time/date it's been set to). That is, if you do this:
var now = new Date();
and then wait a while, a subsequent call to now.g...
Open a file with Notepad in C#
... specified does not have an association, it'll use the Open With... dialog from windows.
Note to those in the comments, thankyou for your input. My quick n' dirty answer was slightly off, i've updated the answer to reflect the correct way.
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Symfony 2 EntityManager injection in service
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Hi, in this example, how could I change the connection from default to any other?
– ptmr.io
Jul 27 '18 at 8:16
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What is the equivalent of “!=” in Excel VBA?
...of that, getting the length in VBA is fast -- it's just reading an integer from memory -- and is slow in Java -- you need to iterate through the string.
– Paulo Avelar
Feb 8 '16 at 19:40
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Struct inheritance in C++
... same as a class except the following differences:
When deriving a struct from a class/struct, the default access-specifier for a base class/struct is public. And when deriving a class, the default access specifier is private.
For example, program 1 fails with a compilation error and program 2 wor...
How to check if a variable is set in Bash?
...ink to the POSIX standard, which references the chapter the table is taken from. One construct I use in almost any script I write is : ${FOOBAR:=/etc/foobar.conf} to set a default value for a variable if it is unset or null.
– Jens
Mar 10 '15 at 11:08
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Example of UUID generation using Boost in C++
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Learn from me and make generators thread local. They're very expensive to seed
– James
Mar 7 at 23:21
add ...
How to handle Objective-C protocols that contain properties?
... ivars if you use auto-synthesis, so that way if your class has properties from a protocol and a class, some of your ivars won't have the different format which could impact readability.
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How do I comment on the Windows command line?
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Lines starting with "rem" (from the word remarks) are comments:
rem comment here
echo "hello"
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