There's no built in way to search a list for a particular item. However Programming in Lua shows how you might build a set that can help:
function Set (list)
local set = {}
for _, l in ipairs(list) do set[l] = true end
return set
end
Then you can put your list in the Set and test for m...
com.google.gson library needs to be added to use this code.
Here is the example string:
String companyDetails = {"companyName":"abcd","address":"abcdefg"}
JSON strings can be parsed using below syntax in Java:
JsonParser parser = new JsonParser();
Json...
To create a parallel collection from a sequential collection, call the par method. To create a sequential collection from a parallel collection, call the seq method. This example shows how you turn a regular Vector into a ParVector, and then back again:
scala> val vect = (1 to 5).toVector
vect:...
PyPar is a library that uses the message passing interface (MPI) to provide
parallelism in Python. A simple example in PyPar (as seen at https://github.com/daleroberts/pypar) looks like this:
import pypar as pp
ncpus = pp.size()
rank = pp.rank()
node = pp.get_processor_name()
print 'I am r...
There are several scopes that are available only in a web-aware application context:
request - new bean instance is created per HTTP request
session - new bean instance is created per HTTP session
application - new bean instance is created per ServletContext
globalSession - new bean instance i...
When using async queries, you can execute multiple queries at the same time, but not on the same context. If the execution time of one query is 10s, the time for the bad example will be 20s, while the time for the good example will be 10s.
Bad Example
IEnumerable<TResult1> result1;
IEnumera...
Apart from LF the only allowed white space character is Space (ASCII value 32). Note that this implies that other white space characters (in, for instance, string and character literals) must be written in escaped form.
\', \", \\, \t, \b, \r, \f, and \n should be preferred over corres...
package com.example.my.package;
The package declaration should not be line wrapped, regardless of whether it exceeds the recommended maximum length of a line.
One variable per declaration (and at most one declaration per line)
Square brackets of arrays should be at the type (String[] args) and not on the variable (String args[]).
Declare a local variable right before it is first used, and initialize it as close to the declaration as possible.
return flag ? "yes" : "no";
String cmp = (flag1 != flag2) ? "not equal" : "equal";
// Don't do this
return (flag ? "yes" : "no");
Redundant grouping parentheses (i.e. parentheses that does not affect evaluation) may be used if t...
var gradient = createLinearGradient( startX, startY, endX, endY )
gradient.addColorStop(gradientPercentPosition, CssColor)
gradient.addColorStop(gradientPercentPosition, CssColor)
[optionally add more color stops to add to the variety of the gradient]
Creates a reusable linear gradient (object...
Arithmetic operators in C++ have the same precedence as they do in mathematics:
Multiplication and division have left associativity(meaning that they will be evaluated from left to right) and they have higher precedence than addition and subtraction, which also have left associativity.
We can also...
A condition variable is a primitive used in conjunction with a mutex to orchestrate communication between threads. While it is neither the exclusive or most efficient way to accomplish this, it can be among the simplest to those familiar with the pattern.
One waits on a std::condition_variable with...
An XML document can contain a DTD. DTD stands for Document Type Declaration. A DTD begins with <!DOCTYPE root-element-name > where doc-element-name must match the name of the so-called document element (the one element at the top-level).
<?xml version="1.0"?>
<!DOCTYPE doc...
int main (void)
{
const int foo_readonly = 10;
int *foo_ptr;
foo_ptr = (int *)&foo_readonly; /* (1) This casts away the const qualifier */
*foo_ptr = 20; /* This is undefined behavior */
return 0;
}
Quoting ISO/IEC 9899:201x, section 6.7.3 §2:
If an attempt i...
A variable declared constexpr is implicitly const and its value may be used as a constant expression.
Comparison with #define
A constexpr is type-safe replacement for #define based compile-time expressions. With constexpr the compile-time evaluated expression is replaced with the result. For examp...
A method can take an array parameter and destructure it immediately into named local variables. Found on Mathias Meyer's blog.
def feed( amount, (animal, food) )
p "#{amount} #{animal}s chew some #{food}"
end
feed 3, [ 'rabbit', 'grass' ] # => "3 rabbits chew some gra...
