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How to show all parents and subclasses of a class in IntelliJ IDEA?
When I'm editing a Java class in Eclipse, when my cursor is over a class variable, I can do Ctrl + T to have a popup that shows all its parents and subclasses. What is the equivalent in IntelliJ?
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What is the best way to filter a Java Collection?
I want to filter a java.util.Collection based on a predicate.
27 Answers
27
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Output first 100 characters in a string
Can seem to find a substring function in python.
8 Answers
8
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How to check for a valid URL in Java?
What is the best way to check if a URL is valid in Java?
8 Answers
8
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Why can't stash be applied to the working directory?
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It sounds like your stash included an untracked file that was subsequently added to the repo. When you try and check it out, git rightly refuses because it would be overwriting an existing file.
To fix, you could do something li...
Sequelize.js delete query?
Is there a way to write a delete/deleteAll query like findAll?
9 Answers
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Performance of FOR vs FOREACH in PHP
First of all, I understand in 90% of applications the performance difference is completely irrelevant, but I just need to know which is the faster construct. That and...
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Any reason not to use '+' to concatenate two strings?
A common antipattern in Python is to concatenate a sequence of strings using + in a loop. This is bad because the Python interpreter has to create a new string object for each iteration, and it ends up taking quadratic time. (Recent versions of CPython can apparently optimize this in some cases, b...
How to tell if a string is not defined in a Bash shell script
If I want to check for the null string I would do
12 Answers
12
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Get the _id of inserted document in Mongo database in NodeJS
I use NodeJS to insert documents in MongoDB. Using collection.insert I can insert a document into database like in this code:
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