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module · Ruby 3.0

Kernel

83 instance methods 2 class methods

RubyGems adds the gem method to allow activation of specific gem versions and overrides the require method on Kernel to make gems appear as if they live on the $LOAD_PATH. See the documentation of these methods for further detail.

The Kernel module is included by class Object, so its methods are available in every Ruby object.

The Kernel instance methods are documented in class Object while the module methods are documented here. These methods are called without a receiver and thus can be called in functional form:

Example

sprintf "%.1f", 1.234 #=> "1.2"

Class methods 2

.pp .URI

Instance methods 83

#` #abort #Array #at_exit #autoload #autoload? #BigDecimal #binding #block_given? #callcc #__callee__ #caller #caller_locations #catch #chomp #chop #class #clone #Complex #__dir__ #eval #exec #exit #exit! #fail #Float #fork #format #frozen? #gem #gem_original_require #gets #global_variables #gsub #Hash #Integer #iterator? #j #jj #JSON #lambda #load #local_variables #loop #__method__ #open #p #Pathname #pp #pretty_inspect #print #printf #proc #putc #puts #raise #rand #Rational #readline #readlines #require #require_relative #select #set_trace_func #sleep #spawn #sprintf #srand #String #sub #syscall #system #tap #test #then #throw #trace_var #trap #untrace_var #URI #warn #y #yield_self

Constants

RUBYGEMS_ACTIVATION_MONITOR

No documentation available

Ruby version changes 6

3.0
- Kernel#clone when called with the freeze: false keyword will call initialize_clone with the freeze: false keyword. [Bug #14266]
- Kernel#clone when called with the freeze: true keyword will call initialize_clone with the freeze: true keyword, and will return a frozen copy even if the receiver is unfrozen. [Feature #16175]
- Kernel#eval when called with two arguments will use “(eval)” for __FILE__ and 1 for __LINE__ in the evaluated code. [Bug #4352]
- Kernel#lambda now warns if called without a literal block. [Feature #15973]
- Kernel.sleep invokes the scheduler hook kernel_sleep(…) in a non-blocking execution context. [Feature #16786]
- Random::DEFAULT is deprecated since its value is now confusing and it is no longer global, use Kernel.rand/Random.rand directly, or create a Random instance with Random.new instead. [Feature #17351]