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How to get values from IGrouping
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Since IGrouping<TKey, TElement> implements IEnumerable<TElement>, you can use SelectMany to put all the IEnumerables back into one IEnumerable all together:
List<smth> list = new List<smth>();
IEnumerable<IGroupin...
How to set focus on input field?
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When a Modal is opened, set focus on a predefined <input> inside this Modal.
Define a directive and have it $watch a property/trigger so it knows when to focus the element:
Name: <input type="text" focus-me="shouldBeOpen">
app.directive('focusMe', ['$tim...
Adding a column to a data.frame
...they index the data frame as if it were a list.
my.dataframe["new.col"] <- a.vector
my.dataframe[["new.col"]] <- a.vector
The data.frame method for $, treats x as a list
my.dataframe$new.col <- a.vector
When [ and [[ are used with two indices (x[i, j] and x[[i, j]]) they act l...
Set select option 'selected', by value
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@JamesCazzetta send an array to val: .val(["Multiple2", "Multiple3"]). api.jquery.com/val/#val-value
– scipilot
Jul 19 '15 at 5:36
136
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CreateElement with id?
...ms pretty complicated for a task that seems pretty simple, so is there an alternative? Thanks :)
7 Answers
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How to do Base64 encoding in node.js?
Does node.js have built-in base64 encoding yet?
7 Answers
7
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std::cin input with spaces?
...Use std::getline:
int main()
{
std::string name, title;
std::cout << "Enter your name: ";
std::getline(std::cin, name);
std::cout << "Enter your favourite movie: ";
std::getline(std::cin, title);
std::cout << name << "'s favourite movie is " << tit...
How do you calculate the average of a set of circular data? [closed]
...y to estimate an average angle, A, from a set of angle measurements
a[i] 0<=i
sum_i_from_1_to_N sin(a[i])
a = arctangent ---------------------------
sum_i_from_1_to_N cos(a[i])
The method given by starblue is computationally equivalent, but his reasons are...
Center a button in a Linear layout
...:layout_centerInParent="true"
So your layout file will look like this:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout android:id="@+id/RelativeLayout01"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
xmlns:android="http://schemas.android.com/...
returning a Void object
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Java 8 has introduced a new class, Optional<T>, that can be used in such cases. To use it, you'd modify your code slightly as follows:
interface B<E>{ Optional<E> method(); }
class A implements B<Void>{
public Optional<Void> method(...