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What is the difference between -viewWillAppear: and -viewDidAppear:?
...ke a long time to execute, like for example doing a webservice call to get extra data for the form above.The good thing is that because the view already exists and is being displayed to the user, you can show a nice "Waiting" message to the user while you get the data.
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Difference between solr and lucene
...with HTTP API instead of Java API, Solr is for you. Solr has also got some extra features on top (e.g. grouping).
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How to check if an app is installed from a web-page on an iPhone?
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To further the accepted answer, you sometimes need to add extra code to handle people returning the browser after launching the app- that setTimeout function will run whenever they do. So, I do something like this:
var now = new Date().valueOf();
setTimeout(function () {
if (ne...
Java compile speed vs Scala compile speed
... files. Depending on the size of your classpath this can take one to three extra seconds.
Overall, expect a startup overhead of scalac of 4-8 seconds, longer if you run it the first time so disk-caches are not filled.
Scala's answer to startup overhead is to either use fsc or to do continuous bui...
How to Right-align flex item?
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@Zanshin13 The other answers all write so much extra css that you might as well leave out the flex container and code the whole thing yourself :)
– Kokodoko
Aug 15 '17 at 14:12
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Send a pull request on GitHub for only latest commit
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Why on earth do I need an extra branch, only to create a PR for a single changed line of code?! Did anyone at github think this through?
– CodeManX
Aug 20 '15 at 1:31
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jQuery append() vs appendChild()
... and answered question and I'm not looking for votes I just want to add an extra little thing that I think might help newcomers.
yes appendChild is a DOM method and append is JQuery method but practically the key difference is that appendChild takes a node as a parameter by that I mean if you want ...
Is a Java hashmap search really O(1)?
... 2 = (n / capacity)2
This is much lower. Since the cost of handling one extra collision is irrelevant to Big O performance, we've found a way to improve performance without actually changing the algorithm! We can generalzie this to
pcollision x k = (n / capacity)k
And now we can disregard...
R apply function with multiple parameters
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Just pass var2 as an extra argument to one of the apply functions.
mylist <- list(a=1,b=2,c=3)
myfxn <- function(var1,var2){
var1*var2
}
var2 <- 2
sapply(mylist,myfxn,var2=var2)
This passes the same var2 to every call of myfxn. If...
How does one make an optional closure in swift?
...(), onReject: Optional<()->()>) { ` then you would not need the extra (), though IMO the ()? is prettier. Also you can make it even prettier with a typealias like typealias RejectHandler = () -> () func then(onFulfilled: ()->(), onReject: RejectHandler?) {
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