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How can I check for “undefined” in JavaScript? [duplicate]
..., "myVariable", {
get: function() { throw new Error("W00t?"); },
set: undefined
});
if (myVariable) {
// Error: W00t?
}
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Merge and interleave two arrays in Ruby
...utate a, you can write a | b and assign the result to a variable.
See the set union documentation for the Array class at http://www.ruby-doc.org/core/classes/Array.html#M000275.
This answer assumes that you don't want duplicate array elements. If you want to allow duplicate elements in your final ...
Case insensitive comparison of strings in shell script
...
Best to save and restore the nocasematch setting. Grab it with SHELLNOCASEMATCH=`shopt -p nocasematch` then change it with shopt -s nocasematch and once done, restore it with $SHELLNOCASEMATCH
– Urhixidur
Dec 5 '17 at 19:25
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How can Perl's print add a newline by default?
...n a handle, only as a static method.
See IO::Handle.
Mnemonic: you set $\ instead of adding "\n" at the end of the print. Also, it's
just like $/ , but it's what you get "back" from Perl.
example:
$\ = "\n";
print "a newline will be appended to the end of this line automatically";
...
How to execute a stored procedure within C# program
...re
SqlCommand cmd = new SqlCommand("CustOrderHist", conn);
// 2. set the command object so it knows to execute a stored procedure
cmd.CommandType = CommandType.StoredProcedure;
// 3. add parameter to command, which will be passed to the stored procedure
cmd.Parameters.Add(new ...
Capture Image from Camera and Display in Activity
...edInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
this.imageView = (ImageView)this.findViewById(R.id.imageView1);
Button photoButton = (Button) this.findViewById(R.id.button1);
photoButton.setOnClickListener(new View.OnC...
WCF Error - Could not find default endpoint element that references contract 'UserService.UserServic
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@sprite I ended up setting my required settings in code (I've overridden the client constructor), as Vishal's answer. This way it gets shipped over across assemblies. Thanks!
– Shimmy Weitzhandler
Nov 15 '...
How to check if an object is nullable?
...ype<T>(T obj)
{
return default(T) == null && typeof(T).BaseType != null && "ValueType".Equals(typeof(T).BaseType.Name);
}
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C++ project organisation (with gtest, cmake and doxygen)
.../include/) and your
headers must be able to include themselves with such a setup.
└── prj
├── include
│ └── prj
│ ├── header2.h
│ └── header.h
└── src
└── x.cpp
works well, because include paths work o...
Array versus List: When to use which?
... it's not a big deal, but it can be a big deal in almost every other case. Setting the List to read-only does help but results in run-time errors, not compile-time.
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