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How can I truncate a double to only two decimal places in Java?
...int numberofDecimals)
{
if ( x > 0) {
return new BigDecimal(String.valueOf(x)).setScale(numberofDecimals, BigDecimal.ROUND_FLOOR);
} else {
return new BigDecimal(String.valueOf(x)).setScale(numberofDecimals, BigDecimal.ROUND_CEILING);
}
}
This method worked fine for ...
How do I get the current Date/time in DD/MM/YYYY HH:MM format?
...
Converting to string then parsing is not ideal.
– Chuck Batson
Jun 10 '17 at 0:31
1
...
Read file line by line using ifstream in C++
...gt; a >> b)
{
// process pair (a,b)
}
Line-based parsing, using string streams:
#include <sstream>
#include <string>
std::string line;
while (std::getline(infile, line))
{
std::istringstream iss(line);
int a, b;
if (!(iss >> a >> b)) { break; } // err...
Is there a better alternative than this to 'switch on type'?
... earlier, you could use a switch statement, but you'll have to use a magic string containing the type name... which is not particularly refactor friendly (thanks @nukefusion)
switch(o.GetType().Name) {
case "AType":
break;
}
...
How to change column datatype from character to numeric in PostgreSQL 8.4
...ype cast caught me off guard. I ended up with TYPE varchar(255) USING (substring(formertextcolumn from 1 for 255))
– funwhilelost
Mar 14 '16 at 23:22
|
...
ASP.NET MVC Conditional validation
...he Validate method:
public class Person : IValidatableObject
{
public string Name { get; set; }
public bool IsSenior { get; set; }
public Senior Senior { get; set; }
public IEnumerable<ValidationResult> Validate(ValidationContext validationContext)
{
if (IsSenio...
What is the difference between map and flatMap and a good use case for each?
...ses are red", "Violets are blue")) // lines
rdd.collect
res0: Array[String] = Array("Roses are red", "Violets are blue")
Now, map transforms an RDD of length N into another RDD of length N.
For example, it maps from two lines into two line-lengths:
rdd.map(_.length).collect
res1: Arr...
How to convert a selection to lowercase or uppercase in Sublime Text
I have several strings selected in a file in Sublime Text and I want to convert them all to lowercase.
5 Answers
...
How can I escape a double quote inside double quotes?
How can I escape double quotes inside a double string in Bash?
8 Answers
8
...
Using C++ library in C code
... with extern "C":
extern "C" int foo(char *bar)
{
return realFoo(std::string(bar));
}
Then, you will call foo() from your C module, which will pass the call on to the realFoo() function which is implemented in C++.
If you need to expose a full C++ class with data members and methods, then yo...