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How do I compare two hashes?
...g the output of .to_a will fail when equal hashes have keys in a different order: {a:1, b:2} == {b:2, a:1} => true, {a:1, b:2}.to_a == {b:2, a:1}.to_a => false
– aidan
Jan 27 '17 at 5:53
...
How to avoid null checking in Java?
... if your method just passes the value on, and the next method passes it on etc. it could get problematic. In that case you may want to check the argument as above.
If null is allowed
This really depends. If find that I often do something like this:
if (object == null) {
// something
} else {
...
How to split a sequence into two pieces by predicate?
...
Exactly what I was looking for. When the list is ordered by a related criterion, this makes a lot more sense.
– erich2k8
Apr 10 '13 at 3:56
add a com...
Removing projects in Sublime Text 2 and 3
...arlier cos it doesn't contain any junk data from previous projects history etc.
I hope this shall improve startup times for sublime text 2.
You may choose to take a backup of Session.sublime-session to a different folder incase you want to remember the project paths etc. and then copy paste the onc...
Error: The processing instruction target matching “[xX][mM][lL]” is not allowed
...ts before the <?xml ?>
declaration. Most commonly this is a Byte Order Mark
(BOM).
Resolution:
Remove the BOM using techniques such as those suggested by the W3C
page on the BOM in HTML.
A stray <?xml ?> declaration exists within the XML content.
This can happen when XML files a...
'UserControl' constructor with parameters in C#
...s Designer forces you to provide a parameterless constuctor on controls in order to work properly. Actually, it only requires a parameterless constructor in order to instantiate controls, but not to design them (the designer will actually parse the InitializeComponent method while designing a contro...
unix domain socket VS named pipes?
...ence is that named pipes are one-way, so you'll need to use two of them in order to do two-way communication. Sockets of course are two way. It seems slightly more complicated to use two variables instead of one (that is, two pipes instead of one socket).
Also, the wikipedia article is pretty clear...
Do I need elements in persistence.xml?
...e Java EE 5 tutorial:
<persistence>
<persistence-unit name="OrderManagement">
<description>This unit manages orders and customers.
It does not rely on any vendor-specific features and can
therefore be deployed to any persistence provider.
...
How do I access properties of a javascript object if I don't know the names?
...ey);
}
}
As you noted, keys are not guaranteed to be in any particular order. Note how this differs from the following:
for each (var value in data) {
console.log(value);
}
This example loops through values, so it would log Property Name and 0. N.B.: The for each syntax is mostly only suppo...
Is it safe to delete an object property while iterating over them?
...s code is legal and will work as expected. Browser quirks affect iteration order and delete statements in general, but not whether the OPs code will work. It's generally best only to delete the current property in the iteration - deleting other properties in the object will unpredictably cause them ...