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When to use StringBuilder in Java [duplicate]
... String concatenation in a loop, something like this,
String s = "";
for (int i = 0; i < 100; i++) {
s += ", " + i;
}
then you should use a StringBuilder (not StringBuffer) instead of a String, because it is much faster and consumes less memory.
If you have a single statement,
String s =...
Uses for the Java Void Reference Type?
...
Void has become convention for a generic argument that you are not interested in. There is no reason why you should use any other non-instantiable type, such as System.
It is also often used in for example Map values (although Collections.newSetFromMap uses Boolean as maps don't have to acc...
dropping infinite values from dataframes in pandas?
...
How can one "exchange" the inf values to a predefined int such as 0, in a certain column?
– 3kstc
Apr 11 '18 at 22:45
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Why do we use __init__ in Python classes?
...s-bound function, just like add or __init__) purpose is to describe how to convert the object to a string, like when you print it out.
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Best data type for storing currency values in a MySQL database
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A point about the size: according to MSDN (msdn.microsoft.com/en-us/library/ms187746.aspx), Decimal(10,4) and Decimal(19,4) both use 9 bytes of storage, so might as well spring for that extra 9 digits of scale.
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How to get the list of properties of a class?
...type:
typeof(Foo).GetProperties();
for example:
class Foo {
public int A {get;set;}
public string B {get;set;}
}
...
Foo foo = new Foo {A = 1, B = "abc"};
foreach(var prop in foo.GetType().GetProperties()) {
Console.WriteLine("{0}={1}", prop.Name, prop.GetValue(foo, null));
}
Fol...
How to use knockout.js with ASP.NET MVC ViewModels?
...ug-in
I thought it was going to be more complex, but it turns out that the integration is really easy, in order to make your model editable just add the following line: (remember that in this case I am using a mixed model, from server and adding extension in client and the editable simply works... i...
Regular Expression For Duplicate Words
...t possible to do \0 too? (Where \0 is the whole regex, up to the current point OR where \0 refers to the whole regex)
– Pindatjuh
May 12 '10 at 22:37
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One line if-condition-assignment
...e should not use this approach if looping through large data sets since it introduces an unnecessary assignment in case we end up in the else-statement.
– dapc
Dec 12 '19 at 9:23
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Hidden Features of SQL Server
...of-batch marker to cause the batch to be repeated that number of times:
PRINT 'X'
GO 10
Will print 'X' 10 times. This can save you from tedious copy/pasting when doing repetitive stuff.
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