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Get last n lines of a file, similar to tail
...on and for that I want to paginate through the lines of the log file. The items in the file are line based with the newest item on the bottom.
...
How to get multiple select box values using jQuery?
...lected array will have the indexes as the option values and the each array item will have the text as its value.
for example
<select id="multipleSelect" multiple="multiple">
<option value="abc">Text 1</option>
<option value="def">Text 2</option>
<option...
How to get the first non-null value in Java?
...n't.
The closest you can get is:
public static <T> T coalesce(T ...items) {
for(T i : items) if(i != null) return i;
return null;
}
For efficient reasons, you can handle the common cases as follows:
public static <T> T coalesce(T a, T b) {
return a == null ? b : a;
}
pub...
How to count items in a Go map?
If I want to count the items in the map structure, what statement should I use?
I tried to use
1 Answer
...
Implement Stack using Two Queues
...eue in queue1
pop:
while size of queue1 is bigger than 1, pipe dequeued items from queue1 into queue2
dequeue and return the last item of queue1, then switch the names of queue1 and queue2
Version B (efficient pop):
push:
enqueue in queue2
enqueue all items of queue1 in queue2, then switch...
Bootstrap: Position of dropdown menu relative to navbar item
...he rest of the surrounding markup has changed a little:
<li class="nav-item dropdown">
<a class="nav-link dropdown-toggle" href="#">
Link
</a>
<div class="dropdown-menu dropdown-menu-right">
<a class="dropdown-item" href="#">...</a>
</div>
&...
What does 'var that = this;' mean in JavaScript?
...
Here is an example
`
$(document).ready(function() {
var lastItem = null;
$(".our-work-group > p > a").click(function(e) {
e.preventDefault();
var item = $(this).html(); //Here value of "this" is ".our-work-group > p > a"
if (ite...
Detect changes in the DOM
... }
}
})()
//------------< DEMO BELOW >----------------
// add item
var itemHTML = "<li><button>list item (click to delete)</button></li>",
listElm = document.querySelector('ol');
document.querySelector('body > button').onclick = function(e){
listElm.ins...
Move to another EditText when Soft Keyboard Next is clicked on Android
...rent"
android:layout_height="wrap_content">
<!--your items-->
</ScrollView>
</LinearLayout>
if you do not want every time it adds, create style:
add style in values/style.xml
default/style:
<style name="AppTheme" parent="Theme.AppCompat.Light.DarkAct...
When should one use RxJava Observable and when simple Callback on Android?
...
Best explanation ever!
– Denis Nek
Mar 4 '16 at 5:40
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show 10 mo...