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Appending an element to the end of a list in Scala
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List(1,2,3) :+ 4
Results in List[Int] = List(1, 2, 3, 4)
Note that this operation has a complexity of O(n). If you need this operation frequently, or for long lists, consider using another data type (e.g. a ListBuffer).
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Error in : object of type 'closure' is not subsettable
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library(shiny)
reactive_df <- reactive({
data.frame(col1 = c(1,2,3),
col2 = c(4,5,6))
})
While we often work with reactive expressions in shiny as if they were data frames, they are actually functions that return data frames (or other objects).
isolate({
print(reactiv...
How do I round to the nearest 0.5?
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edited May 20 '19 at 11:35
extempl
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answered Aug 25 '09 at 16...
SQLite - increase value by a certain number
...row):
UPDATE Products SET Price = Price + 50 WHERE ProductID = 1
Sample 3 (generic):
UPDATE {Table} SET {Column} = {Column} + {Value} WHERE {Condition}
Where:
{Table} - table name
{Column} - column name
{Value} - a number by which column's value should be increased or decreased
{Condition} -...
Remove outline from select box in FF
... methodofactionmethodofaction
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How to concatenate two IEnumerable into a new IEnumerable?
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345
Yes, LINQ to Objects supports this with Enumerable.Concat:
var together = first.Concat(second...
Concatenating string and integer in python
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answered Jul 19 '12 at 10:43
user647772user647772
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What algorithm gives suggestions in a spell checker?
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203
There is good essay by Peter Norvig how to implement a spelling corrector. It's basicly a brute ...
What is the IntelliJ shortcut key to create a javadoc comment?
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3 Answers
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Mockito: InvalidUseOfMatchersException
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edited Jun 23 at 20:19
senfo
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a...