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Apache Commons equals/hashCode builder [closed]
...t equals()):
a) in both versions of equals() above, you might want to use one or both of these shortcuts also:
@Override
public boolean equals(final Object obj){
if(obj == this) return true; // test for reference equality
if(obj == null) return false; // test for null
// continue as a...
Drop all duplicate rows across multiple columns in Python Pandas
...drop_duplicates function is great for "uniquifying" a dataframe. However, one of the keyword arguments to pass is take_last=True or take_last=False , while I would like to drop all rows which are duplicates across a subset of columns. Is this possible?
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C++ unordered_map using a custom class type as the key
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To be able to use std::unordered_map (or one of the other unordered associative containers) with a user-defined key-type, you need to define two things:
A hash function; this must be a class that overrides operator() and calculates the hash value given an object o...
Where is PATH_MAX defined in Linux?
...mits.h>
char current_path[PATH_MAX];
PATH_MAX has some flaws as mentioned in this blog (thanks paulsm4)
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Why are there two ways to unstage a file in Git?
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So typically, one would use git rm --cached <filePath> to remove some file(s) from the repo after realizing it should have never been in the repo: so most likely running this command & then adding the relevant files to gitignore....
How to get subarray from array?
...d. console.log(ar); // -> [1, 2, 3, 4, 5]
– daemonexmachina
Dec 18 '18 at 18:35
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Using git repository as a database backend
...ve to maintain state for all of them. There are several approaches to this one, but all of them are either too hard on resources or too complex to implement (and thus kind of kill the original purpose of offloading all the hard implementation stuff to git in the first place):
"Blunt" approach: 1 u...
How to resize superview to fit all subviews with autolayout?
...ntentView and grab the height.
Further considerations exist if you have one or more UILabel's in your view that are multiline. For these it is imperitive that the preferredMaxLayoutWidth property be set correctly such that the label provides a correct intrinsicContentSize, which will be used in ...
Can you use a trailing comma in a JSON object?
...'t the first entry
s.appendF("\"%d\"", i);
}
s.append("]");
That extra one line of code in your for loop is hardly expensive...
Another alternative I've used when output a structure to JSON from a dictionary of some form is to always append a comma after each entry (as you are doing above) and ...
Describe the architecture you use for Java web applications? [closed]
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Ok I'll do a (shorter) one:
Frontend : Tapestry (3 for older projects, 5 for newer projects)
Business layer: Spring
DAO's : Ibatis
Database : Oracle
We use Sping transaction support, and start transactions upon entering the service layer, propa...