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Remove an entire column from a data.frame in R
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421
You can set it to NULL.
> Data$genome <- NULL
> head(Data)
chr region
1 chr1 CDS...
TFS Code Reviews - Show updated files in response to comments
We are beginning to use the code review functionality built-in to VS 2012 and VS 2013 preview. Requesting the review and adding comments seem pretty straightforward. If someone adds comments requesting the code to be changed, then how does the requester make these changes and show them?
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Centering a background image, using CSS
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13 Answers
13
Active
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How to trigger XDebug profiler for a command line PHP script?
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261
You can pass INI settings with the -d flag: php -d xdebug.profiler_enable=On script.php.
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How do you delete a column by name in data.table?
...of the following will remove column foo from the data.table df3:
# Method 1 (and preferred as it takes 0.00s even on a 20GB data.table)
df3[,foo:=NULL]
df3[, c("foo","bar"):=NULL] # remove two columns
myVar = "foo"
df3[, (myVar):=NULL] # lookup myVar contents
# Method 2a -- A safe idiom for e...
Remove all spaces from a string in SQL Server
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edited Jan 18 '19 at 13:41
answered May 3 '12 at 13:11
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Is there any difference between a GUID and a UUID?
...20 Update: While GUIDs (as used by Microsoft) and UUIDs (as defined by RFC4122) look similar and serve similar purposes, there are subtle-but-occasionally-important differences. Specifically, some Microsoft GUID docs allow GUIDs to contain any hex digit in any position, while RFC4122 requires certa...
Making button go full-width?
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edited Apr 19 '18 at 18:43
Beau Smith
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Where does System.Diagnostics.Debug.Write output appear?
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edited Jul 21 '09 at 15:26
answered Jul 21 '09 at 15:10
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How to know if two arrays have the same values
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function arraysEqual(_arr1, _arr2) {
if (!Array.isArray(_arr1) || ! Array.isArray(_arr2) || _arr1.length !== _arr2.length)
return false;
var arr1 = _arr1.concat().sort();
var arr2 = _arr2.concat().sort();
for (var i = 0; i &l...