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javac is not recognized as an internal or external command, operable program or batch file [closed]
...allation of Java on Windows requires some manual steps. You must always perform these steps after installing Java, including after upgrading the JDK.
Environment variables and PATH
(If you already understand this, feel free to skip the next three sections.)
When you run javac HelloWorld.java, cmd...
XML Serialization - Disable rendering root element of array
...lSerializer(typeof(ShopItem));
ser.Serialize(Console.Out, item, ns); // Inform the XmlSerializerNamespaces here
I got this output:
<?xml version="1.0" encoding="ibm850"?>
<SHOPITEM>
<PRODUCTNAME>test</PRODUCTNAME>
<VARIANT>
<PRODUCTNAME>hi 1</PRODUC...
Concept behind these four lines of tricky C code
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@Derek This is because of the platform-specific endianness: the bytes of the abstract IEEE 754 representation are stored in memory at decreasing addresses, so the string prints correctly. On hardware with big endianness one would need to start with a differen...
What is the purpose of Rank2Types?
..., the rough idea is that polymorphic types don't really have the a -> b form that they do in Haskell; in reality, they look like this, always with explicit quantifiers:
id :: ∀a.a → a
id = Λt.λx:t.x
If you don't know the "∀" symbol, it's read as "for all"; ∀x.dog(x) means "for all x,...
What is the difference between class and instance attributes?
...
Beyond performance considerations, there is a significant semantic difference. In the class attribute case, there is just one object referred to. In the instance-attribute-set-at-instantiation, there can be multiple objects referred ...
What is N-Tier architecture?
...programming, you need to package up the data in some sort of transportable form called "dataset" and fly them over the wire. .NET's DataSet class or Web Services protocol like SOAP are few of such attempts to fly objects over the wire.
...
JavaScript replace/regex
...rms of pattern interpretation, there's no difference between the following forms:
/pattern/
new RegExp("pattern")
If you want to replace a literal string using the replace method, I think you can just pass a string instead of a regexp to replace.
Otherwise, you'd have to escape any regexp speci...
jQuery add required to input fields
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@Miura-shi You're missing the <form></form> tags in your jsFiddle
– JESTech
Oct 9 '17 at 23:24
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What is the difference between SQL, PL-SQL and T-SQL?
...database management systems: SQL Server, Oracle, MySQL, PostgreSQL, DB2, Informix, etc.
PL/SQL is a proprietary procedural language used by Oracle
PL/pgSQL is a procedural language used by PostgreSQL
TSQL is a proprietary procedural language used by Microsoft in SQL Server.
Procedural languages ar...
Why and How to avoid Event Handler memory leaks?
...nloaded event of the Window.
A rule of thumb: If your view (i.e. WPF, WinForm, UWP, Xamarin Form, etc.) subscribes to an event of a ViewModel, always remember to detach the event handler. Because a ViewModel is usually lives longer than a view. So, if the ViewModel is not destroyed, any view that ...