Tutorial by Topics: ion

For many programmers the regex is some sort of magical sword that they throw to solve any kind of text parsing situation. But this tool is nothing magical, and even though it's great at what it does, it's not a full featured programming language (i.e. it is not Turing-complete). What does 'regu...
navigator.geolocation.getCurrentPosition(successFunc, failureFunc) navigator.geolocation.watchPosition(updateFunc, failureFunc) navigator.geolocation.clearWatch(watchId) The Geolocation API does what you might expect: retrieve information about the client's whereabouts, represented in lat...
Some examples in this topic might have a different order when used because dictionary order is not guaranteed.
The HTML5 standards does not list the main element as a sectioning element.
You can read more about extensions in The Swift Programming Language.
map(function, iterable[, *additional_iterables]) future_builtins.map(function, iterable[, *additional_iterables]) itertools.imap(function, iterable[, *additional_iterables]) ParameterDetailsfunctionfunction for mapping (must take as many parameters as there are iterables) (positional-only)...
value1 ** value2 pow(value1, value2[, value3]) value1.__pow__(value2[, value3]) value2.__rpow__(value1) operator.pow(value1, value2) operator.__pow__(value1, value2) math.pow(value1, value2) math.sqrt(value1) math.exp(value1) cmath.exp(value1) math.expm1(value1)
UNION keyword in SQL is used to combine to SELECT statement results with out any duplicate. In order to use UNION and combine results both SELECT statement should have same number of column with same data type in same order, but the length of column can be different. SELECT column_1 [, column_2 ]...
Due to the flaws of rand(), many other default implementations have emerged over the years. Among those are: arc4random() (available on OS X and BSD) random() (available on Linux) drand48() (available on POSIX)
Functions in Go provide organized, reusable code to perform a set of actions. Functions simplify the coding process, prevent redundant logic, and make code easier to follow. This topic describes the declaration and utilization of functions, arguments, parameters, return statements and scopes in Go. ...
mydict = {} mydict[k] = value value = mydict[k] value = mydict.get(k) value = mydict.get(k, "default_value") ParameterDetailskeyThe desired key to lookupvalueThe value to set or return Helpful items to remember when creating a dictionary: Every key must be unique (otherwi...
git config [<file-option>] name [value] # one of the more common use cases of git config ParameterDetails--systemEdits the system-wide configuration file, which is used for every user (on Linux, this file is located at $(prefix)/etc/gitconfig)--globalEdits the global configuration fi...
command </path/to/file # Redirect standard input to file command >/path/to/file # Redirect standard output to flie command file_descriptor>/path/to/file # Redirect output of file_descriptor to file command >&file_descriptor # Redirect output to file_descriptor command file_des...
ParameterDetailsbillingAgreementAttributesConfiguration object to create the billing agreementbillingPlanBilling plan ID from the query stringbillingPlanAttribsConfiguration object to create the billing planbillingPlanUpdateAttributesConfiguration object for changing a billing plan to an active sta...
Define a function with the function keyword: function f { } Define a function with (): f(){ } Define a function with both the function keyword and (): function f(){ }
Conditional expressions, involving keywords such as if, else if, and else, provide Swift programs with the ability to perform different actions depending on a Boolean condition: True or False. This section covers the use of Swift conditionals, Boolean logic, and ternary statements. For more in...
Scala has first-class functions. Difference between functions and methods: A function is not a method in Scala: functions are a value, and may be assigned as such. Methods (created using def), on the other hand, must belong to a class, trait or object. Functions are compiled to a class exte...

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