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Filter Java Stream to 1 and only 1 element
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Create a custom Collector
public static <T> Collector<T, ?, T> toSingleton() {
return Collectors.collectingAndThen(
Collectors.toList(),
list -> {
if (list.size() != 1) {
thr...
Can you list the keyword arguments a function receives?
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A little nicer than inspecting the code object directly and working out the variables is to use the inspect module.
>>> import inspect
>>> def func(a,b,c=42, *args, **kwargs): pass
>>> inspect.getargspec(func)
(['a', 'b', 'c'], 'args', 'k...
How do I count the number of occurrences of a char in a String?
...idiomatic one-liner' for this is:
int count = StringUtils.countMatches("a.b.c.d", ".");
Why write it yourself when it's already in commons lang?
Spring Framework's oneliner for this is:
int occurance = StringUtils.countOccurrencesOf("a.b.c.d", ".");
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Subqueries vs joins
...tion we inherited from another company to use an inner join instead of a subquery like:
14 Answers
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What is the difference between Bower and npm?
What is the fundamental difference between bower and npm ? Just want something plain and simple. I've seen some of my colleagues use bower and npm interchangeably in their projects.
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How to use mysql JOIN without ON condition?
Is it possible to write join query without ON statement? and how do these joins differ LEFT JOIN, RIGHT JOIN works.
2 A...
Difference between git pull --rebase and git pull --ff-only
Let's say origin/master has commit A--B--C and my local/master has commit A--B--D .
1 Answer
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Is there a built-in method to compare collections?
...ctions in my Equals method. I have a Dictionary and an IList. Is there a built-in method to do this?
15 Answers
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Draw in Canvas by finger, Android
I need to build a project for drawing on canvas by fingers,
6 Answers
6
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Regex replace uppercase with lowercase letters
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Alex K.Alex K.
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