Tutorial by Examples: e

This shows how you can iterate over multiple variables: for { x <- 1 to 2 y <- 'a' to 'd' } println("(" + x + "," + y + ")") (Note that to here is an infix operator method that returns an inclusive range. See the definition here.) This creates the outp...

Consider this simple project with a flat directory structure: example |-- example.asd |-- functions.lisp |-- main.lisp |-- packages.lisp `-- tools.lisp The example.asd file is really just another Lisp file with little more than an ASDF-specific function call. Assuming your project depends o...

Can be used to shorten if/else operations. This comes in handy for returning a value quickly (i.e. in order to assign it to another variable). For example: var animal = 'kitty'; var result = (animal === 'kitty') ? 'cute' : 'still nice'; In this case, result gets the 'cute' value, because the v...

#include <lua.h> #include <lauxlib.h> #include <lualib.h> int main(void) { 5.1 /* Start by creating a new VM state */ lua_State *L = luaL_newstate(); /* Load standard Lua libraries: */ luaL_openlibs(L); 5.1 /* For older version of Lua use lua_open ins...

Generally To use regular expression specific characters (?+| etc.) in their literal meaning they need to be escaped. In common regular expression this is done by a backslash \. However, as it has a special meaning in Java Strings, you have to use a double backslash \\. These two examples will not ...

git cherry-pick <commit-hash> will apply the changes made in an existing commit to another branch, while recording a new commit. Essentially, you can copy commits from branch to branch. Given the following tree (Source) dd2e86 - 946992 - 9143a9 - a6fd86 - 5a6057 [master] \ ...

The background-image property is used to specify a background image to be applied to all matched elements. By default, this image is tiled to cover the entire element, excluding margin. .myClass { background-image: url('/path/to/image.jpg'); } To use multiple images as background-image, defi...

Method Chaining is a technique explained in Martin Fowler's book Domain Specific Languages. Method Chaining is summarized as Makes modifier methods return the host object, so that multiple modifiers can be invoked in a single expression. Consider this non-chaining/regular piece of code (ported...

A CLOS class is described by: a name a list of superclasses a list of slots further options like documentation Each slot has: a name an initialization form (optional) an initialization argument (optional) a type (optional) a documentation string (optional) accessor, reader and/or wr...

Go is a statically typed language, meaning you generally have to declare the type of the variables you are using. // Basic variable declaration. Declares a variable of type specified on the right. // The variable is initialized to the zero value of the respective type. var x int var s string va...

In Go, you can declare multiple variables at the same time. // You can declare multiple variables of the same type in one line var a, b, c string var d, e string = "Hello", "world!" // You can also use short declaration to assign multiple variables x, y, z := 1, 2, 3 ...

The ls command's -l option prints a specified directory's contents in a long listing format. If no directory is specified then, by default, the contents of the current directory are listed. ls -l /etc Example Output: total 1204 drwxr-xr-x 3 root root 4096 Apr 21 03:44 acpi -rw-r--r-- 1 r...

The basic format of C-style for loop is: for (( variable assignment; condition; iteration process )) Notes: The assignment of the variable inside C-style for loop can contain spaces unlike the usual assignment Variables inside C-style for loop aren't preceded with $. Example: for (( i = ...

It is tricky to remove items from a list while within a loop, this is due to the fact that the index and length of the list gets changed. Given the following list, here are some examples that will give an unexpected result and some that will give the correct result. List<String> fruits = new...

/* declare items of the enum */ #define FOREACH \ X(item1) \ X(item2) \ X(item3) \ /* end of list */ /* define the enum values */ #define X(id) MyEnum_ ## id, enum MyEnum { FOREACH }; #undef X /* convert an enum value to its identifier */ const char * enum2string(int...

To publish the changes you made in your working copy, run the svn commit command. IMPORTANT: Review your changes before committing them! Use svn status and svn diff to review the changes. Also, make sure you are in the correct path before performing a commit. If you updated many files across vari...

Using the Java-SDK 3.0.1 CountDownLatch lock = new CountDownLatch(1); SpeechToText service = new SpeechToText(); service.setUsernameAndPassword("<username>", "<password>"); FileInputStream audio = new FileInputStream("filename.wav"); RecognizeOpti...

This example shows how to use the IBM Watson Speech to Text service to recognize the type of an audio file and produce a transcription of the spoken text in that file. This example requires Speech to Text service credentials and Node.js Install the npm module for the Watson Developer Cloud N...

Performs an explicit conversion into the given type from the value resulting from evaluating the given expression. int x = 3; int y = 4; printf("%f\n", (double)x / y); /* Outputs "0.750000". */ Here the value of x is converted to a double, the division promotes the value of...

With a type as operand Evaluates into the size in bytes, of type size_t, of objects of the given type. Requires parentheses around the type. printf("%zu\n", sizeof(int)); /* Valid, outputs the size of an int object, which is platform-dependent. */ printf("%zu\n", sizeof int); ...