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How do I break out of a loop in Scala?
...> sum+=i)
(warning--this depends on details of how the takeWhile test and the foreach are interleaved during evaluation, and probably shouldn't be used in practice!).
(1b) Use tail recursion instead of a for loop, taking advantage of how easy it is to write a new method in Scala:
var sum = 0
...
Embedded MongoDB when running integration tests
... the accepted answer from @rozky (a lot has been changed in both the Mongo and Embedded MongoDB libraries).
package com.example.mongo;
import com.mongodb.BasicDBObject;
import com.mongodb.MongoClient;
import com.mongodb.client.MongoCollection;
import com.mongodb.client.MongoDatabase;
import de.fla...
How to redirect stderr and stdout to different files in the same line in script?
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Just add them in one line command 2>> error 1>> output
However, note that >> is for appending if the file already has data. Whereas, > will overwrite any existing data in the file.
So, command 2> error 1> output if you do not...
Animate the transition between fragments
...e the transition between fragments. I got the answer from the following
Android Fragments and animation
8 Answers
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Remove duplicated rows using dplyr
...mple(0:1, 10, replace = T),
z = 1:10
)
One approach would be to group, and then only keep the first row:
df %>% group_by(x, y) %>% filter(row_number(z) == 1)
## Source: local data frame [3 x 3]
## Groups: x, y
##
## x y z
## 1 0 1 1
## 2 1 0 2
## 3 1 1 4
(In dplyr 0.2 you won't need...
How to set caret(cursor) position in contenteditable element (div)?
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In most browsers, you need the Range and Selection objects. You specify each of the selection boundaries as a node and an offset within that node. For example, to set the caret to the fifth character of the second line of text, you'd do the following:
functi...
How to find event listeners on a DOM node when debugging or from the JavaScript code?
I have a page where some event listeners are attached to input boxes and select boxes. Is there a way to find out which event listeners are observing a particular DOM node and for what event?
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What's the result of += in C and C++?
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Semantics of the compound assignment operators is different in C and C++:
C99 standard, 6.5.16, part 3:
An assignment operator stores a value in the object designated by the left operand. An
assignment expression has the value of the left operand after the assignment, but is not an
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Determine path of the executing script
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Here there is a simple solution for the problem. This command:
script.dir <- dirname(sys.frame(1)$ofile)
returns the path of the current script file. It works after the script was saved.
share
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Getting “NoSuchMethodError: org.hamcrest.Matcher.describeMismatch” when running test in IntelliJ 10.
I'm using JUnit-dep 4.10 and Hamcrest 1.3.RC2.
14 Answers
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