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Paste multiple columns together
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# your starting data..
data <- data.frame('a' = 1:3, 'b' = c('a','b','c'), 'c' = c('d', 'e', 'f'), 'd' = c('g', 'h', 'i'))
# columns to paste together
cols <- c( 'b' , 'c' , 'd' )
# create a new column `x` with the three columns collapsed together
data$x <- apply( d...
What does string::npos mean in this code?
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tronman
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answered Sep 30 '10 at 5:15
Brian R. BondyBrian R. Bondy
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How to annotate MYSQL autoincrement field with JPA annotations
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answered Nov 5 '10 at 3:18
Pascal ThiventPascal Thivent
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Shortest distance between a point and a line segment
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EDIT 2: I needed a Java version, but more important, I needed it in 3d instead of 2d.
float dist_to_segment_squared(float px, float py, float pz, float lx1, float ly1, float lz1, float lx2, float ly2, float lz2) {
float line_dist = dist_sq(lx1, ly1, lz1, lx2, ly2, lz2);
if (line_dist == ...
jQuery multiple events to trigger the same function
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1834
You can use .on() to bind a function to multiple events:
$('#element').on('keyup keypress blur...
how to debug the js in jsfiddle
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edited Apr 7 '15 at 12:32
answered Apr 7 '15 at 12:25
ap...
How do I remove files saying “old mode 100755 new mode 100644” from unstaged changes in Git?
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1333
That looks like unix file permissions modes to me (755=rwxr-xr-x, 644=rw-r--r--) - the old mod...
Detect when an image fails to load in Javascript
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edited Jun 3 '14 at 14:48
TehWan
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answe...
Attach to a processes output for viewing
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answered Apr 3 '09 at 21:20
Don WerveDon Werve
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Table Naming Dilemma: Singular vs. Plural Names [closed]
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answered Dec 3 '08 at 19:31
community wiki
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