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B-Tree vs Hash Table
In MySQL, an index type is a b-tree, and access an element in a b-tree is in logarithmic amortized time O(log(n)) .
5 Answ...
Naming of enums in Java: Singular or Plural?
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Enums in Java (and probably enums in general) should be singular. The thinking is that you're not selecting multiple Protocols, but rather one Protocol of the possible choices in the list of values.
Note the absence of plurals: http://doc...
Python dict how to create key or append an element to key?
...his answer suggests a far better way. In fact it gets set() as an argument and allows you to use add() method...
– fatih_dur
Feb 9 '16 at 2:27
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Open a project in a new window in IntelliJ after “accidentally” clicking remember decision
I wanted to open a new project in a separate window in IntelliJ and I "accidentally" clicked "Remember this decision and don't ask again" and clicked "open in the same window"!
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How can I find non-ASCII characters in MySQL?
...haracter class in the regular expression. For example, if periods, commas, and hyphens are OK, change the query to:
SELECT * FROM tableName WHERE columnToCheck NOT REGEXP '[A-Za-z0-9.,-]';
The most relevant page of the MySQL documentation is probably 12.5.2 Regular Expressions.
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How to dynamically build a JSON object with Python?
I am new to Python and I am playing with JSON data. I would like to dynamically build a JSON object by adding some key-value to an existing JSON object.
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What is the difference between Unidirectional and Bidirectional JPA and Hibernate associations?
What is the difference between Unidirectional and Bidirectional associations?
4 Answers
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Advantage of creating a generic repository vs. specific repository for each object?
We are developing an ASP.NET MVC application, and are now building the repository/service classes. I'm wondering if there are any major advantages to creating a generic IRepository interface that all repositories implement, vs. each Repository having its own unique interface and set of methods.
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FragmentPagerAdapter Exists Only In Android.Support.V4.App (and not Android.App)
I cannot find find FragmentPagerAdapter within Android.App.
5 Answers
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What does curly brackets in the `var { … } = …` statements do?
...om arrays or objects using a syntax that mirrors the construction of array and object literals.
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One particularly useful thing you can do with destructuring assignment is to read an entire structure in a single statement, although there are a number of interesting things you can do with them,...