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Applying a function to every row of a table using dplyr?
...mically formed datatframe? So in this data frame the column names are not known. I am able to add if column names are known.
– Arun Raja
May 4 '15 at 7:49
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node.js global variables?
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Globals are generally to be avoided, but if you really want to use them. The 3 statements below are all equivalent and will assign a var to the global scope: GLOBAL._ = require('underscore'); global._ = require('underscore'); _ = require('underscore');
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Do any JVM's JIT compilers generate code that uses vectorized floating point instructions?
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So, basically, you want your code to run faster. JNI is the answer. I know you said it didn't work for you, but let me show you that you are wrong.
Here's Dot.java:
import java.nio.FloatBuffer;
import org.bytedeco.javacpp.*;
import org.bytedeco.javacpp.annotation.*;
@Platform(include = "Dot.h...
How to fix Git error: object file is empty?
...- a/tex/MCMC-in-IRT.tex
+++ b/tex/MCMC-in-IRT.tex
It worked!
Step 8: So now we need to point HEAD to 9f0abf890b113a287e10d56b66dbab66adc1662d.
nathanvan@nathanvan-N61Jq:~/workspace/mcmc-chapter$ git update-ref HEAD 9f0abf890b113a287e10d56b66dbab66adc1662d
Which didn't complain.
Step 9: See w...
Get original URL referer with PHP?
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Store it either in a cookie (if it's acceptable for your situation), or in a session variable.
session_start();
if ( !isset( $_SESSION["origURL"] ) )
$_SESSION["origURL"] = $_SERVER["HTTP_REFERER"];
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HTML5 Pre-resize images before uploading
...nt this doesn't cover is maintaining the orientation information, without knowledge of this metadata the image is resized and saved as-is, losing any metadata within the image for orientation meaning that images taken on a tablet device "upside down" were rendered as such, although they would have b...
Resize fields in Django Admin
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Note that this will not work if filter_horizontal or filter_vertical is set for the corresponding fields in YourModelAdmin. I've spent some time to figure this out.
– Dennis Golomazov
Sep 9 '13 at 10:32
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In an array of objects, fastest way to find the index of an object whose attributes match a search
...round a little trying to find an efficient way to do this, but have gotten nowhere. I have an array of objects that looks like this:
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Is False == 0 and True == 1 an implementation detail or is it guaranteed by the language?
...teed as it is possible for True and False to be reassigned. However, even if this happens, boolean True and boolean False are still properly returned for comparisons.
In Python 3.x True and False are keywords and will always be equal to 1 and 0.
Under normal circumstances in Python 2, and always ...
“The given path's format is not supported.”
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Got an error now:Error 4 A using namespace directive can only be applied to namespaces; 'System.IO.Path' is a type not a namespace
– All Blond
Sep 8 '11 at 13:32
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