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Java logical operator short-circuiting
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In fact, to be really complete, all of &&, ||, & and | evaluate left to right. For a set of booleans b1, b2, ..., bn, the short circuit versions will cease evaluation when the first of these booleans is true (||) or false (&&a...
Visual Studio 2010 IntelliSense doesn't select a default value - it just marks it
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@Tomas. Of course you do - all of the solutions above rely on that. Imagine if that didn't happen. You start typing the name of a variable, which in the first few letters could match several variables with similar names but different types, and ALL th...
Get last record in a queryset
...g from the Django documentation:
... note that reverse() should
generally only be called on a QuerySet
which has a defined ordering (e.g.,
when querying against a model which
defines a default ordering, or when
using order_by()). If no such ordering
is defined for a given QuerySet,
...
Android: how to handle button click
...ionality (Java Class Files). It also makes for easier debugging. It is actually a lot easier to read this way and think about Android imo.
Question 2:
I believe the two mainly used are #2 and #3. I will use a Button clickButton as an example.
2
is in the form of an anonymous class.
Button clickButto...
What is boxing and unboxing and what are the trade offs?
... that are minimal wrappers around primitive types*. Boxed values are typically stored as pointers to objects on the heap.
Thus, boxed values use more memory and take at minimum two memory lookups to access: once to get the pointer, and another to follow that pointer to the primitive. Obviously th...
'any' vs 'Object'
...ate an error telling you exactly that. If you use any instead you are basically telling the transpiler that anything goes, you are providing no information about what is stored in a - it can be anything! And therefore the transpiler will allow you to do whatever you want with something defined as an...
Conditional formatting based on another cell's value
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Note: when it says "B5" in the explanation below, it actually means "B{current_row}", so for C5 it's B5, for C6 it's B6 and so on. Unless you specify $B$5 - then you refer to one specific cell.
This is supported in Google Sheets as of 2015:
https://support.google.com/drive/answe...
In Bash, how can I check if a string begins with some value?
... $a == "z*" ]]? In other words: do they work differently? And what specifically do you mean when you say "$a is equal to z*"?
– Niels Bom
Jun 16 '15 at 10:37
5
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How to “git clone” including submodules?
...e available in version 2.8, and fetches up to 8 submodules at a time in parallel — see man git-clone.
With version 1.9 of Git up until version 2.12 (-j flag only available in version 2.8+):
git clone --recursive -j8 git://github.com/foo/bar.git
cd bar
With version 1.6.5 of Git and later, you c...