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check if directory exists and delete in one command unix
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Try:
bash -c '[ -d my_mystery_dirname ] && run_this_command'
EDIT: This will work if you can run bash on the remote machine....
EDIT 2: In bash, [ -d something ] checks if there is directory called 'something', returning a success co...
How do I raise a Response Forbidden in django
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Thank you @dave-halter, you'r right. I updated my comment to correct it.
– Mario Orlandi
Mar 10 '18 at 16:49
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AngularJS: How can I pass variables between controllers?
...roller where you want to use it.
Simple service example:
angular.module('myApp', [])
.service('sharedProperties', function () {
var property = 'First';
return {
getProperty: function () {
return property;
},
setProperty: func...
How to clear gradle cache?
...to realize that said cache is independent of Gradle's build cache, AFAIK.
my understanding is that Android's cache predates (and inspired) Gradle's, but i could be wrong. whether the Android builder will be/was updated to use Gradle's cache and retire its own, i do not know.
EDIT: the Android buil...
equals vs Arrays.equals in Java
...he 70s I was the "system programmer" (sysadmin) for an IBM 370 system, and my employer was a member of the IBM users group SHARE. It would sometimes happen thatsomebody submitted an APAR (bug report) on some unexpected behavior of some CMS command, and IBM would respond NOTABUG: the command does wha...
Converting a double to an int in C#
...ow an exception. Cast will return an int, but you won'y know which one (in my implementation it's Int32.MinValue) because you're in unchecked context. (Should you be in checked context, the cast will throw an exception as well in these cases.)
– Jeppe Stig Nielsen
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Difference between GeoJSON and TopoJSON
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True. I'm wrong. I'd delete my answer, but we'd lose your valuable comment!
– sgillies
Feb 7 '13 at 18:05
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Undoing accidental git stash pop
... It took me a bit of mangling to get it right. Here is the result of my work: git diff -p ${STACH_SHA1}~1 ${STASH_SHA1} | patch -R -p1; I tried with git show as suggested but its output was not good for patch; also I had to provide the -p1 option to patch in order to strip the a/.. and b/.. el...
How to convert CharSequence to String?
...at the interface does this is arguably a poor decision in that regard, and my answer simply highlights that this is an easier than normal place for human error to occur.
– fragorl
Aug 1 '16 at 1:59
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What is the difference between map and flatMap and a good use case for each?
...rom those that return a Some:
val rdd = sc.parallelize(Seq(1,2,3,4))
def myfn(x: Int): Option[Int] = if (x <= 2) Some(x * 10) else None
rdd.flatMap(myfn).collect
res3: Array[Int] = Array(10,20)
(noting here that an Option behaves rather like a list that has either one element, or zero e...