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In R, how to get an object's name after it is sent to a function?
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The old deparse-substitute trick:
a<-data.frame(x=1:10,y=1:10)
test<-function(z){
mean.x<-mean(z$x)
nm <-deparse(substitute(z))
print(nm)
return(mean.x)}
test(a)
#[1] "a" ... this is the side-effect of the print() call
# ... you could have done...
Replace input type=file by an image
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280
This works really well for me:
.image-upload>input {
display: none;
}
<div class...
What does “all” stand for in a makefile?
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answered Mar 25 '10 at 11:26
P ShvedP Shved
83.1k1414 gold badges113113 silver badges160160 bronze badges
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Is having an 'OR' in an INNER JOIN condition a bad idea?
...ed of an immensely slow query (several minutes on two tables with only ~50,000 rows each, on SQL Server 2008 if it matters), I narrowed down the problem to an OR in my inner join, as in:
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How to center the content inside a linear layout?
..._parent"
android:layout_height="match_parent"
android:background="#000"
android:baselineAligned="false"
android:gravity="center"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/ac...
Declaration of Methods should be Compatible with Parent Methods in PHP
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answered Jun 25 '10 at 3:40
davidtbernaldavidtbernal
11.9k88 gold badges4141 silver badges5757 bronze badges
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Rails: create on has_one association
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edited May 9 '12 at 14:07
answered Oct 1 '10 at 13:59
se...
Validate uniqueness of multiple columns
...be patched?
– Alexey
Jul 16 '12 at 20:09
13
Alexey, validates_uniqueness_of [:user_id, :friend_id...
Difference between database and schema
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edited Jun 20 at 9:12
Community♦
111 silver badge
answered Mar 16 '11 at 10:11
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Removing a model in rails (reverse of “rails g model Title…”)
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answered Aug 18 '11 at 10:35
Mikhail NikalyukinMikhail Nikalyukin
11.4k11 gold badge4242 silver badges6969 bronze badges
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