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List comprehension vs map
...ogramming constructs, MAP CAN BE LAZY, and in fact is lazy in python. That means you can do this (in python3) and your computer will not run out of memory and lose all your unsaved data:
>>> map(str, range(10**100))
<map object at 0x2201d50>
Try doing that with a list comprehension...
Difference between array_push() and $array[] =
...
@gekannt How would that happen? Do you mean if 'some value' in your comment is a closure? That would store the reference of the closure in to the array. If you mean that 'some value' is a function that gets invoked, it would add whatever that function returns.
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Regular expression to extract text between square brackets
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what does the character class [^]] mean? What does it match?
– Richard
Sep 15 '13 at 13:25
3
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setBackground vs setBackgroundDrawable (Android)
...e completeness of it... You'd do something like following:
int sdk = android.os.Build.VERSION.SDK_INT;
if(sdk < android.os.Build.VERSION_CODES.JELLY_BEAN) {
setBackgroundDrawable();
} else {
setBackground();
}
For this to work you need to set buildTarget api 16 and min build to 7 or so...
jQuery .val change doesn't change input value
...ttribute or jQuery's attr you will also affect the DOM element's value: jsfiddle.net/a8SxF/1
– TheZ
Aug 8 '12 at 21:58
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Mockito: InvalidUseOfMatchersException
.... and in fact there is : eq
when(recommendedAccessor.searchRecommendedHolidaysProduct(eq(metas), any(List.class), any(HotelsBoardBasisType.class), any(Config.class)))
.thenReturn(recommendedResults);
In this example 'metas' is an existing list of values
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Difference between volatile and synchronized in Java
... race condition.
Using synchronized on a block of code makes it atomic - meaning it make it as if the 3 operations happen at once, and there's no way for another thread to come in the middle and interfere. So if x was 1, and 2 threads try to preform x++ we know in the end it will be equal to 3. So...
Using arrays or std::vectors in C++, what's the performance gap?
...portantly, they are usually written using templates and/or inlining, which means that what appears to a lot of code in debug resolves to little or no code produced in release build, meaning no difference with their built-in less safe competition.
All in all, it falls on two categories:
Dynamic array...
Adding days to $Date in PHP
...ate = new DateTime($Date1);
$date->add(new DateInterval('P1D')); // P1D means a period of 1 day
$Date2 = $date->format('Y-m-d');
Take a look at the DateInterval constructor manual page to see how to construct other periods to add to your date (2 days would be 'P2D', 3 would be 'P3D', and so ...
HTML select form with option to enter custom value
... datalist. Then you add a list attribute to the input, with a value of the id of the datalist.
Update: As of March 2019 all major browsers (now including Safari 12.1 and iOS Safari 12.3) support datalist to the level needed for this functionality. See caniuse for detailed browser support.
It looks...