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Difference between fold and reduce?
... types.
With reduce, you apply a function f to every list element starting from the first one:
f (... (f i0 i1) i2 ...) iN.
With fold, you apply f starting from the accumulator s:
f (... (f s i0) i1 ...) iN.
Therefore, reduce results in an ArgumentException on empty list. Moreover, fold is mo...
Default constructor vs. inline field initialization
...t it's the same functionality for less code (which is always good).
Apart from that, no difference.
However, if you do have explicit constructors, I'd prefer to put all initialization code into those (and chain them) rather than splitting it up between constructors and field initializers.
...
Find the files that have been changed in last 24 hours
...
You can do that with
find . -mtime 0
From man find:
[The] time since each file was last modified is divided by 24 hours and any remainder is discarded. That means that to
match -mtime 0, a file will have to have a modification in the past which is ...
Deserialize JSON to ArrayList using Jackson
I have a Java class MyPojo that I am interested in deserializing from JSON. I have configured a special MixIn class, MyPojoDeMixIn , to assist me with the deserialization. MyPojo has only int and String instance variables combined with proper getters and setters. MyPojoDeMixIn looks somet...
The type or namespace name could not be found [duplicate]
...
This happened to me last week but from loading a 4.5.2 library in a 4.5 project. Just a note: A 4.5.2 project can load a 4.5 or 4.5.1 library just fine.
– ahwm
Jan 12 '15 at 16:13
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Calling Java from Python
What is the best way to call java from python?
(jython and RPC are not an option for me).
9 Answers
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How to remove new line characters from a string?
... I had a similar problem where I needed also to remove newlines from my string. I tried to do it with string.Replace, didn't work. When I used Regex.Replace with the exact same regular expression string as the parameter, it worked. Thanks.
– instanceof
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Render HTML to an image
...:
given an html file, generate a (png) image with transparent background from the command line
Using Chrome headless (version 74.0.3729.157 as of this response), it is actually easy:
"/Applications/Google Chrome.app/Contents/MacOS/Google Chrome" --headless --screenshot --window-size=256,256 --d...
How can I tell gcc not to inline a function?
...ific noinline attribute.
This function attribute prevents a
function from being considered for
inlining. If the function does not
have side-effects, there are
optimizations other than inlining that
causes function calls to be optimized
away, although the function call is
live. To k...
Why do we need break after case statements?
...
Java comes from C and that is the syntax from C.
There are times where you want multiple case statements to just have one execution path.
Below is a sample that will tell you how many days in a month.
class SwitchDemo2 {
public st...