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How to debug stream().map(…) with lambda expressions?
...he elements of the stream:
List<Integer> naturals = Arrays.asList(1,2,3,4,5,6,7,8,9,10,11,12,13);
naturals.stream()
.map(n -> n * 2)
.peek(System.out::println)
.collect(Collectors.toList());
UPDATE:
I think you're getting confused because map is an intermediate operation - i...
Git alias with positional parameters
... |
edited Mar 4 '18 at 13:20
Eugen Konkov
13.6k55 gold badges5959 silver badges9393 bronze badges
answer...
Changing column names of a data frame
...X <- data.frame(bad=1:3, worse=rnorm(3))
R> X
bad worse
1 1 -2.440467
2 2 1.320113
3 3 -0.306639
R> colnames(X) <- c("good", "better")
R> X
good better
1 1 -2.440467
2 2 1.320113
3 3 -0.306639
You can also subset:
R> colnames(X)[2] <- "superduper"
...
CSS fixed width in a span
...
432
ul {
list-style-type: none;
padding-left: 0px;
}
ul li span {
float: left;
w...
Remove specific commit
...d like this:
$ cat >myfile <<EOF
line 1
junk
junk
junk
junk
line 2
junk
junk
junk
junk
line 3
EOF
$ git add myfile
$ git commit -m "initial check-in"
1 files changed, 11 insertions(+), 0 deletions(-)
create mode 100644 myfile
$ perl -p -i -e 's/line 2/this is the second line/;' myfile
$...
Python “extend” for a dictionary
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728
a.update(b)
Latest Python Standard Library Documentation
...
Integrate ZXing in Android Studio
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234
I was integrating ZXING into an Android application and there were no good sources for the inp...
wkhtmltopdf: cannot connect to X server
...
21 Answers
21
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Linking R and Julia?
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42
The RJulia R package looks quite good now from R. R CMD check runs without warnings or errors...