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How to select rows from a DataFrame based on column values?
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10 Answers
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swift case falling through
...= "hello"
var result = 0
switch testVal {
case "one", "two":
result = 1
default:
result = 3
}
Alternatively, you can use the fallthrough keyword:
var testVal = "hello"
var result = 0
switch testVal {
case "one":
fallthrough
case "two":
result = 1
default:
result = 3
}
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Simplest way to do a recursive self-join?
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113
WITH q AS
(
SELECT *
FROM mytable
WHERE ParentID IS ...
What's the (hidden) cost of Scala's lazy val?
...$0;
private String msg;
public String msg() {
if ((bitmap$0 & 1) == 0) {
synchronized (this) {
if ((bitmap$0 & 1) == 0) {
synchronized (this) {
msg = "Lazy";
}
}
bitmap$0 = bitmap$0 | 1;
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How to limit depth for recursive file list?
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Checkout the -maxdepth flag of find
find . -maxdepth 1 -type d -exec ls -ld "{}" \;
Here I used 1 as max level depth, -type d means find only directories, which then ls -ld lists contents of, in long format.
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Scala: what is the best way to append an element to an Array?
...repend it:
0 +: array :+ 4
should produce:
res3: Array[Int] = Array(0, 1, 2, 3, 4)
It's the same as with any other implementation of Seq.
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AngularJS changes URLs to “unsafe:” in extension page
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361
You need to explicitly add URL protocols to Angular's whitelist using a regular expression. Only...
What is the full path to the Packages folder for Sublime text 2 on Mac OS Lion
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answered Oct 23 '11 at 12:50
Rob CowieRob Cowie
20.4k55 gold badges5757 silver badges5656 bronze badges
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C# Thread safe fast(est) counter
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answered Nov 1 '12 at 16:50
Austin SalonenAustin Salonen
44.8k1515 gold badges100100 silver badges134134 bronze badges
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How to copy directories in OS X 10.7.3?
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251
Is there something special with that directory or are you really just asking how to copy directo...