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In R, how to get an object's name after it is sent to a function?
...n(mean.x)}
test(a)
#[1] "a" ... this is the side-effect of the print() call
# ... you could have done something useful with that character value
#[1] 5.5 ... this is the result of the function call
Edit: Ran it with the new test-object
Note: this will not succeed inside a local fun...
AngularJS validation with no enclosing
...ive (see docs here) to group anything, even outside a html form. Then, you can take advantage from angular FormController.
<div class="form-group" ng-form name="myForm">
<input name="myInput" type="text" class="form-control" ng-model="bindTo" ng-maxlength="5">
<span class="er...
What does “all” stand for in a makefile?
...unning just make should do the same as make all.
To achieve 1 all is typically defined as a .PHONY target that depends on the executable(s) that form the entire program:
.PHONY : all
all : executable
To achieve 2 all should either be the first target defined in the make file or be assigned as t...
Best way to check if a Data Table has a null value in it
...Null class
If you want to check if a null value exists in the table you can use this method:
public static bool HasNull(this DataTable table)
{
foreach (DataColumn column in table.Columns)
{
if (table.Rows.OfType<DataRow>().Any(r => r.IsNull(column)))
return ...
Is having an 'OR' in an INNER JOIN condition a bad idea?
...
This kind of JOIN is not optimizable to a HASH JOIN or a MERGE JOIN.
It can be expressed as a concatenation of two resultsets:
SELECT *
FROM maintable m
JOIN othertable o
ON o.parentId = m.id
UNION
SELECT *
FROM maintable m
JOIN othertable o
ON o.id = m.parentId
, each ...
Merge Images Side by Side(Horizontally)
...le).
montage [0-5].png -tile 5x1 -geometry +0+0 out.png
Other examples can be found on Montage Usage page
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How do I use a file grep comparison inside a bash if/else statement?
...ing in comments, names that merely start with "master", etc.
This works because the if takes a command and runs it, and uses the return value of that command to decide how to proceed, with zero meaning true and non-zero meaning false—the same as how other return codes are interpreted by the shell...
How to access test resources in Scala?
...ur example of data.xml being in $SBT_PROJECT_HOME/src/test/resources/, you can access it in a test like so:
import scala.io.Source
// The string argument given to getResource is a path relative to
// the resources directory.
val source = Source.fromURL(getClass.getResource("/data.xml"))
Of cours...
Rails detect if request was AJAX
In my action I wish to only respond with processing if it was called from an AJAX request. How do I check?
5 Answers
...
jQuery: Adding two attributes via the .attr(); method
...inutes, it's not letting me accept it right now.
– Ricardo Zea
Oct 22 '12 at 15:17
Correction: you can change type att...