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R - Concatenate two dataframes?
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You want "rbind".
b$b <- NA
new <- rbind(a, b)
rbind requires the data frames to have the same columns.
The first line adds column b to data frame b.
Results
> a <- data.frame(a=c(0,1,2), b=c(3,4,5), c=c(6,7,8...
Ruby on Rails console is hanging when loading
For whatever reason, the Ruby on Rails console refuses to start; it just hangs. I haven't made any changes to my code, and other projects using the same version of Ruby and Ruby on Rails have no issue. When I finally Ctrl + C I get this stack trace, which points to Spring.
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How do I exclude all instances of a transitive dependency when using Gradle?
My gradle project uses the application plugin to build a jar file. As part of the runtime transitive dependencies, I end up pulling in org.slf4j:slf4j-log4j12 . (It's referenced as a sub-transitive dependency in at least 5 or 6 other transitive dependencies - this project is using spring and hado...
Can you 'exit' a loop in PHP?
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You are looking for the break statement.
$arr = array('one', 'two', 'three', 'four', 'stop', 'five');
while (list(, $val) = each($arr)) {
if ($val == 'stop') {
break; /* You could also write 'break 1;' here. */
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How to compare strings ignoring the case
I want apple and Apple comparison to be true .
Currently
5 Answers
5
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Use JAXB to create Object from XML String
How can I use the below code to unmarshal a XML string an map it to the JAXB object below?
4 Answers
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Disable copy constructor
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You can make the copy constructor private and provide no implementation:
private:
SymbolIndexer(const SymbolIndexer&);
Or in C++11, explicitly forbid it:
SymbolIndexer(const SymbolIndexer&) = delete;
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How to use nodejs to open default browser and navigate to a specific URL
I'm writing an application using Node.js.
5 Answers
5
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Unstage a deleted file in git
Usually, to discard changes to a file you would do:
6 Answers
6
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if arguments is equal to this string, define a variable like this string
I am doing some bash script and now I got one variable call source and one array called samples , like this:
3 Answers
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