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When to use static vs instantiated classes
...n it's just a tool that works on other stuff (like, for instance, a syntax converter for BB code to HTML ; it doesn't have a life on its own)
(Yeah, I admit, really really overly-simplified...)
One thing about static methods/classes is that they don't facilitate unit testing (at least in PHP, but...
range over interface{} which stores a slice
Given the scenario where you have a function which accepts t interface{} . If it is determined that the t is a slice, how do I range over that slice?
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delete vs delete[] operators in C++
...tructors for an array of objects created with new [].
Using delete on a pointer returned by new [] or delete [] on a pointer returned by new results in undefined behavior.
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appending array to FormData and send via AJAX
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You have several options:
Convert it to a JSON string, then parse it in PHP (recommended)
JS
var json_arr = JSON.stringify(arr);
PHP
$arr = json_decode($_POST['arr']);
Or use @Curios's method
Sending an array via FormData.
Not recommended: Seriali...
difference between foldLeft and reduceLeft in Scala
...ere is the signature of foldLeft (could also have been foldRight for the point I'm going to make):
def foldLeft [B] (z: B)(f: (B, A) => B): B
And here is the signature of reduceLeft (again the direction doesn't matter here)
def reduceLeft [B >: A] (f: (B, A) => B): B
These two look ve...
Difference between null and empty (“”) Java String
...not, 20 is a number). Same case for null: it's not a string, but it can be converted to one if you try to add it.
– daboross
Mar 4 '18 at 9:13
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Indexes of all occurrences of character in a string
The following code will print 2
14 Answers
14
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Remove Fragment Page from ViewPager in Android
...ted by this answer, I found that the solution is to override the getItemId(int position) method of FragmentPagerAdapter to give a new unique ID whenever there has been a change in the expected position of a Fragment.
Source Code:
private class MyPagerAdapter extends FragmentPagerAdapter {
pri...
Why does this code using random strings print “hello world”?
The following print statement would print "hello world".
Could anyone explain this?
15 Answers
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When is assembly faster than C?
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Here is a real world example: Fixed point multiplies on old compilers.
These don't only come handy on devices without floating point, they shine when it comes to precision as they give you 32 bits of precision with a predictable error (float only has 23 bit and ...