Tutorial by Topics: t

implicit val x: T = ??? Implicit classes allow custom methods to be added to existing types, without having to modify their code, thereby enriching types without needing control of the code. Using implicit types to enrich an existing class is often referred to as an 'enrich my library' pat...

intellij-idea is an IDE made as the spiritual successor for the widely-adopted Eclipse IDE used for Java development. Eclipse, although extremely powerful, is often criticized for being extremely clunky and difficult to use. Intellij IDEA attempts to build an IDE with similar power to Eclipse, bu...

This section provides an overview of what nunit is, and why a developer might want to use it. It should also mention any large subjects within nunit, and link out to the related topics. Since the Documentation for nunit is new, you may need to create initial versions of those related topics. ...

A Toast provides simple feedback about an operation in a small popup and automatically disappears after a timeout. It only fills the amount of space required for the message and the current activity remains visible and interactive. Toast makeText (Context context, CharSequence text, int dura...

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Standard syntax: INSERT OVERWRITE TABLE tablename1 [PARTITION (partcol1=val1, partcol2=val2 ...) [IF NOT EXISTS]] select_statement1 FROM from_statement; INSERT INTO TABLE tablename1 [PARTITION (partcol1=val1, partcol2=val2 ...)] select_statement1 FROM from_statement; INSERT INTO T...

You need to make sure that every time you process a UTF-8 string, you do so safely. This is, unfortunately, the hard part. You'll probably want to make extensive use of PHP's mbstring extension. PHP's built-in string operations are not by default UTF-8 safe. There are some things you c...

Perfect forwarding requires forwarding references in order to preserve the ref-qualifiers of the arguments. Such references appear only in a deduced context. That is: template<class T> void f(T&& x) // x is a forwarding reference, because T is deduced from a call to f() { g(s...

virtual void f(); virtual void g() = 0; // C++11 or later: virtual void h() override; void i() override; virtual void j() final; void k() final; Only non-static, non-template member functions can be virtual. If you are using C++11 or later, it is recommended to use ...

VersionMajor ChangesRelease Date3.02004-06-183.7.11SELECT max(x), y2012-03-203.8.3CTEs2014-02-11

CSS Variables allow authors to create reusable values which can be used throughout a CSS document. For example, it's common in CSS to reuse a single color throughout a document. Prior to CSS Variables this would mean reusing the same color value many times throughout a document. With CSS Variables ...

Simple classes RegexMatches[abc]Any of the following characters: a, b, or c[a-z]Any character from a to z, inclusive (this is called a range)[0-9]Any digit from 0 to 9, inclusive Common classes Some groups/ranges of characters are so often used, they have special abbreviations: RegexMatche...

Environment variables in dynamic inventory won't work, f.e. "ansible_ssh_private_key_file": $HOME/.ssh/key.pem" If the dynamic inventory server side passes $HOME for example, replace the variable in the client code (Python): json_input.replace("$HOME", os.environ.get(...

JSONField(**options) Django's JSONField actually stores the data in a Postgres JSONB column, which is only available in Postgres 9.4 and later. JSONField is great when you want a more flexible schema. For example if you want to change the keys without having to do any data migratio...