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How to check that a string is a palindrome using regular expressions?
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The answer to this question is that "it is impossible". More specifically, the interviewer is wondering if you paid attention in your computational theory class.
In your computational theory class you learned about finite state machines. A finite state machine is composed of nodes and edg...
Disabled href tag
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There is no disabled attribute for hyperlinks. If you don't want something to be linked then you'll need to remove the <a> tag altogether, or remove its href attribute.
share
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Is there a difference between authentication and authorization?
I see these two terms bandied about quite a bit (specifically in web-based scenarios but I suppose it's not limited to that) and I was wondering whether or not there was a difference.
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How do I build a numpy array from a generator?
... numpy assumes its array sizes to not change. It relies heavily on different views of the same chunk of memory, so allowing arrays to be expanded and reallocated would require an additional layer of indirection to enable views, for example.
– joeln
Aug 4...
How to define custom exception class in Java, the easiest way?
...ed by the compiler for every class that defines no constructor of its own. If you define an explicit constructor, you don't get the default even if the superclass has it, and if your class has no constructor, you get the default even if the superclass does not have it.
– Michae...
How to create a tag with Javascript?
...reateElement('style');
head.appendChild(style);
style.type = 'text/css';
if (style.styleSheet){
// This is required for IE8 and below.
style.styleSheet.cssText = css;
} else {
style.appendChild(document.createTextNode(css));
}
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How to customize the back button on ActionBar
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The "up" affordance indicator is provided by a drawable specified in the homeAsUpIndicator attribute of the theme. To override it with your own custom version it would be something like this:
<style name="Theme.MyFancyTheme" parent="android:Theme.Holo">
<item name="andro...
What is a sealed trait?
...ds Answer
case object No extends Answer
The compiler will emit a warning if a match is not exhaustive:
scala> val x: Answer = Yes
x: Answer = Yes
scala> x match {
| case No => println("No")
| }
<console>:12: warning: match is not exhaustive!
missing combination ...
git -> show list of files changed in recent commits in a specific directory
...ommand as it shows the file status: Added (A), Copied (C), Deleted (D), Modified (M), Renamed (R), and others.
git log --name-status -10 path/to/dir
It is worth looking at the full documentation page for git log. There you will learn that -10 refers to the past 10 commits, and -p will give you t...
Comparator.reversed() does not compile using lambda
...be Object (the inference fallback of last resort), which fails.
Obviously if you can use a method reference, do that and it'll work. Sometimes you can't use a method reference, e.g., if you want to pass an additional parameter, so you have to use a lambda expression. In that case you'd provide an e...