Tutorial by Examples: int

to check if the given path is a directory dirname = '/home/john/python' os.path.isdir(dirname) to check if the given path is a file filename = dirname + 'main.py' os.path.isfile(filename) to check if the given path is symbolic link symlink = dirname + 'some_sym_link' os.path.islink(symli...
All non-static member functions have a hidden parameter, a pointer to an instance of the class, named this; this parameter is silently inserted at the beginning of the parameter list, and handled entirely by the compiler. When a member of the class is accessed inside a member function, it is silent...
Sometimes it can be useful to test your Powershell data files and iterate through the nodes and servers. Powershell 5 (WMF5) added this neat little feature for doing this called Import-PowerShellDataFile . Example: $data = Import-PowerShellDataFile -path .\MydataFile.psd1 $data.AllNodes
CLISP has an integration with GNU Readline. For improvements for other implementations see: How to customize the SBCL REPL.
PHP 4+ supplies a method, format that converts a DateTime object into a string with a desired format. According to PHP Manual, this is the object oriented function: public string DateTime::format ( string $format ) The function date() takes one parameters - a format, which is a string Format T...
Each array instance contains an internal pointer. By manipulating this pointer, different elements of an array can be retrieved from the same call at different times. Using each Each call to each() returns the key and value of the current array element, and increments the internal array pointer. ...
Trees are a sub-type of the more general node-edge graph data structure. To be a tree, a graph must satisfy two requirements: It is acyclic. It contains no cycles (or "loops"). It is connected. For any given node in the graph, every node is reachable. All nodes are reachable throug...
@Entity @Table(name="FOO") public class Foo { private UUID fooId; @OneToMany(mappedBy = "bar") private List<FooBar> bars; } @Entity @Table(name="BAR") public class Bar { private UUID barId; @OneToMany(mappedBy = "f...
@Entity @Table(name="FOO") public class Foo { private UUID fooId; @OneToMany @JoinTable(name="FOO_BAR", joinColumns = @JoinColumn(name="fooId"), inverseJoinColumns = @JoinColumn(name="barId")) private List<Bar&g...
@Entity @Table(name="FOO") public class Foo { private UUID fooId; @OneToMany @JoinTable(name="FOO_BAR", joinColumns = @JoinColumn(name="fooId"), inverseJoinColumns = @JoinColumn(name="barId", unique=true)) private ...
Add the following directive before using any other mod_rewrite directive (RewriteRule, RewriteCond, RewriteBase or RewriteMap). RewriteEngine on By default the engine is turned off. mod_rewrite directives found while the engine is turned off are ignored. Enable it from within the virtual host co...
Add the debugger statement in your content script var foo = 1; debugger; foo = 2; Open the Developer Tool on the web page where your content script is injected to see the code execution pause at those lines.
In this iText 5 example, we will create a Hello World example in different languages, using different fonts: public void createPdf(String dest) throws DocumentException, IOException { Document document = new Document(); PdfWriter.getInstance(document, new FileOutputStream(dest)); ...
In this iText 7 example, we will create a Hello World example in different languages, using different fonts: public void createPdf(String dest) throws IOException { PdfDocument pdf = new PdfDocument(new PdfWriter(dest)); try (Document document = new Document(pdf)) { PdfFont fon...
A Java entry-point class has a main method with the following signature and modifiers: public static void main(String[] args) Sidenote: because of how arrays work, it can also be (String args[]) When the java command starts the virtual machine, it loads the specified entry-point classes and...
These are the available editions of SQL Server, as told by the Editions Matrix: Express: Entry-level free database. Includes core-RDBMS functionality. Limited to 10G of disk size. Ideal for development and testing. Standard Edition: Standard Licensed edition. Includes core functionality and Busi...
In Julia, as in many other languages, it is possible to interpolate by inserting values defined by variables into strings. For a simple example: n = 2 julia> MyString = "there are $n ducks" "there are 2 ducks" We can use other types than numeric, e.g. Result = false j...
Expressions are a specific type of object in Julia. You can think of an expression as representing a piece of Julia code that has not yet been evaluated (i.e. executed). There are then specific functions and operations, like eval() which will evaluate the expression. For instance, we could write ...
Creating Expressions mentions that expressions are closely related to strings. As such, the principles of interpolation within strings are also relevant for Expressions. For instance, in basic string interpolation, we can have something like: n = 2 julia> MyString = "there are $n ducks&q...
A user is looking to use caffe for CNN training and testing. The user decides upon the CNN architecture design (e.g - No. of layers, No. of filters and their details etc). The user also decides the optimization technique for training and learning parameters in case training is to be carried out...

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