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Paste multiple columns together
...c('d', 'e', 'f'),
'd' = c('g', 'h', 'i'))
tidyr::unite_(data, paste(colnames(data)[-1], collapse="_"), colnames(data)[-1])
a b_c_d
1 1 a_d_g
2 2 b_e_h
3 3 c_f_i
Edit: Exclude first column, everything else gets pasted.
# tidyr_0.6.3
unite(data, newCol, -a)
# or by colum...
How can jQuery deferred be used?
...he new Deferred object and the attached methods .when , .Deferred and ._Deferred .
11 Answers
...
MbUnit under Linux, used within an F# project?
...this post: https://stackoverflow.com/a/21185517/9798633
2) Make sure your tests are compiled with the same version of MbUnit as was distributed with Gallio, as discussed here: https://stackoverflow.com/a/2242849/9798633
3) If you try running in VS in a VM, doublecheck to make sure you have a Class...
Passing $_POST values with cURL
How do you pass $_POST values to a page using cURL ?
8 Answers
8
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Leaflet - How to find existing markers, and delete markers?
...
The layers are internally stored in map._layers.
– flup
Jan 26 '13 at 14:51
11
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Is there any way to ignore INSTALL_FAILED_VERSION_DOWNGRADE on application install with the Android
...l -r <link to APK> . For debugging purposes, I frequently need to re-test older APK's; and the -r flag would replace the older build in older Android versions. Is there a work-around here to ignore [INSTALL_FAILED_VERSION_DOWNGRADE] ?
...
Excel: last character/string match in a string
...st came up with this solution, no VBA needed;
Find the last occurance of "_" in my example;
=IFERROR(FIND(CHAR(1);SUBSTITUTE(A1;"_";CHAR(1);LEN(A1)-LEN(SUBSTITUTE(A1;"_";"")));0)
Explained inside out;
SUBSTITUTE(A1;"_";"") => replace "_" by spaces
LEN( *above* ) => count the chars
LEN(A1)...
Make git automatically remove trailing whitespace before committing
...
I just tested it in Windows: this works just fine in a DOS command prompt: set VISUAL= && git add -ue . && git checkout . Note the '.' used with git add: that is because of git1.8.3
– VonC
...
Does Swift have documentation generation support?
...// You can use bulleted lists (use `-`, `+` or `*`):
///
/// - Text can be _emphasised_
/// - Or **strong**
///
/// Or numbered lists:
///
/// 7. The numbers you use make no difference
/// 0. The list will still be ordered, starting from 1
/// 5. But be sensible and just use 1, 2, 3 etc…
///
/// -...
Read/Write 'Extended' file properties (C#)
...;
Shell32.Folder objFolder;
objFolder = shell.NameSpace(@"C:\temp\testprop");
for( int i = 0; i < short.MaxValue; i++ )
{
string header = objFolder.GetDetailsOf(null, i);
if (String.IsNullOrEmpty(header))
break;
arrHeaders.Add(header);
}
...