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Macro vs Function in C
...ator though... overlooked that... But it might still be less readable.)
Order of Operations: (courtesy of @ouah)
#define min(a,b) (a < b ? a : b)
min(x & 0xFF, 42)
gets expanded to:
(x & 0xFF < 42 ? x & 0xFF : 42)
But & has lower precedence than <. So 0xFF < 42 ...
Can you run GUI applications in a Docker container?
... > /etc/apt/sources.list
RUN apt-get update
# Install vnc, xvfb in order to create a 'fake' display and firefox
RUN apt-get install -y x11vnc xvfb firefox
RUN mkdir ~/.vnc
# Setup a password
RUN x11vnc -storepasswd 1234 ~/.vnc/passwd
# Autostart firefox (might not be the best way...
CSS Selector “(A or B) and C”?
... As of five o'clock this morning, yes! I have js that spits out first order logic, with selectors at the leaves, giving results such as :not(:not([data-status="ACT"]):not([data-status="ISS"]):not([data-status="COR"]))[data-month="08"]. The code is not clean enough for public perusal, yet, othe...
Try-finally block prevents StackOverflowError
...ly block. The problem is that it will take a really, really long time. The order of time is O(2^N) where N is the maximum stack depth.
Imagine the maximum depth is 5
foo() calls
foo() calls
foo() calls
foo() calls
foo() which fails to call foo()
final...
Can someone explain collection_select to me in clear, simple terms?
...specify some collection or array of rows.
# It can be Author.where(..).order(..) or something like that.
# In your example it is:
Author.all,
# then you should specify methods for generating options
:id, # this is name of method that will be called for every row, result will b...
Is it intended by the C++ standards committee that in C++11 unordered_map destroys what it inserts?
...e just lost three days of my life tracking down a very strange bug where unordered_map::insert() destroys the variable you insert. This highly non-obvious behaviour occurs in very recent compilers only: I found that clang 3.2-3.4 and GCC 4.8 are the only compilers to demonstrate this "feature".
...
generate model using user:references vs user_id:integer
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Important is to remember that it will not create foreign keys for you. In order to do that, you need to set it up explicitly using either:
t.references :something, foreign_key: true
t.belongs_to :something_else, foreign_key: true
or (note the plural):
add_foreign_key :table_name, :somethings
ad...
What to do on TransactionTooLargeException
... FAILED BINDER TRANSACTION !!!
Which are not neccesarily printed in that order, but (as far as I checked) happen on the same millisecond.
And the stack trace itself, for clarity, is the same as in the question:
E/AndroidRuntime(28182): java.lang.RuntimeException: Adding window failed
..
E/Androi...
How to take all but the last element in a sequence using LINQ?
...
As an alternative to creating your own method and in a case the elements order is not important, the next will work:
var result = sequence.Reverse().Skip(1);
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Reading file contents on the client-side in javascript in various browsers
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In order to read a file chosen by the user, using a file open dialog, you can use the <input type="file"> tag. You can find information on it from MSDN. When the file is chosen you can use the FileReader API to read the co...