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Get all column names of a DataTable into string array using (LINQ/Predicate)
... .Select(x => x.ColumnName)
.ToArray();
or in LINQ Query syntax:
string[] columnNames = (from dc in dt.Columns.Cast<DataColumn>()
select dc.ColumnName).ToArray();
Cast is required, because Columns is of type DataColum...
How to return 2 values from a Java method?
...
Instead of returning an array that contains the two values or using a generic Pair class, consider creating a class that represents the result that you want to return, and return an instance of that class. Give the class a meaningful name. The benef...
In c# is there a method to find the max of 3 numbers?
... MoreMath.Max(1, 2, 3) or MoreMath.Max(1, 2, 3, 4) without the overhead of array creation, but still write MoreMath.Max(1, 2, 3, 4, 5, 6) for nice readable and consistent code when you don't mind the overhead.
I personally find that more readable than the explicit array creation of the LINQ approac...
How to Iterate over a Set/HashSet without an Iterator?
...movie : movies) {
System.out.println(movie);
}
Method 3
String[] movieArray = movies.toArray(new String[movies.size()]);
for (int i = 0; i < movieArray.length; i++) {
System.out.println(movieArray[i]);
}
Method 4
// Supported in Java 8 and above
movies.stream().forEach((movie) -> {
...
How to use a decimal range() step value?
...er or not to include the right endpoint:
>>> np.linspace(0,1,11)
array([ 0. , 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1. ])
>>> np.linspace(0,1,10,endpoint=False)
array([ 0. , 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9])
If you really want to use a float...
Javascript: How to loop through ALL DOM elements on a page?
...
@Florian: just like you would access an array element -- all[i] would give you the current element.
– Andy E
Nov 23 '10 at 13:36
2
...
Does python have a sorted list?
...rm if this information will be here )
PPS. And CPython lists are actually arrays (not, say, skiplists or etc) . Well, I guess they have to be something simple, but as for me, the name is a little bit misleading.
So, if I am not mistaken, the bisect/list speeds would probably be:
for a push(): ...
How do I make the return type of a method generic?
...
private static T[] prepareArray<T>(T[] arrayToCopy, T value)
{
Array.Copy(arrayToCopy, 1, arrayToCopy, 0, arrayToCopy.Length - 1);
arrayToCopy[arrayToCopy.Length - 1] = value;
return (T[])arrayToCopy;
}
I was pe...
How to convert URL parameters to a JavaScript object?
...ifferently.
A common use case will be to join the two same values into an array, making the output object into:
{foo: ["first_value", "second_value"]}
This can be achieved with the following code:
const groupParamsByKey = (params) => [...params.entries()].reduce((acc, tuple) => {
// get...
JavaScript data formatting/pretty printer
...";
else if (typeof value == 'object')
{
if (value instanceof Array)
{
value = "[ " + value + " ]";
}
else
{
var ood = DumpObject(value);
value = "{ " + ood.dump + " }";
}
}
result += "'" + property + "' : " + value + ", ";
...