Regular Expressions 101

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An explanation of your regex will be automatically generated as you type.
Detailed match information will be displayed here automatically.
  • All Tokens
  • Common Tokens
  • General Tokens
  • Anchors
  • Meta Sequences
  • Quantifiers
  • Group Constructs
  • Character Classes
  • Flags/Modifiers
  • Substitution
  • A single character of: a, b or c
    [abc]
  • A character except: a, b or c
    [^abc]
  • A character in the range: a-z
    [a-z]
  • A character not in the range: a-z
    [^a-z]
  • A character in the range: a-z or A-Z
    [a-zA-Z]
  • Any single character
    .
  • Alternate - match either a or b
    a|b
  • Any whitespace character
    \s
  • Any non-whitespace character
    \S
  • Any digit
    \d
  • Any non-digit
    \D
  • Any word character
    \w
  • Any non-word character
    \W
  • Non-capturing group
    (?:...)
  • Capturing group
    (...)
  • Zero or one of a
    a?
  • Zero or more of a
    a*
  • One or more of a
    a+
  • Exactly 3 of a
    a{3}
  • 3 or more of a
    a{3,}
  • Between 3 and 6 of a
    a{3,6}
  • Start of string
    ^
  • End of string
    $
  • A word boundary
    \b
  • Non-word boundary
    \B

Regular Expression
No Match

r"
"
gm

Test String

Code Generator

Language

Generated Code

re = /(?P<key>\w+) = (?P<val>[^\\]+)/m str = '{"global_quality": "[general]\\ version = 4\\ name = Benchy Jonas\\ definition = fdmprinter\\ \\ [metadata]\\ setting_version = 6\\ type = quality_changes\\ quality_type = normal\\ \\ [values]\\ acceleration_enabled = True\\ adhesion_type = skirt\\ bridge_settings_enabled = True\\ jerk_enabled = False\\ layer_height = 0.2\\ layer_height_0 = 0.2\\ magic_spiralize = False\\ material_bed_temperature = 50\\ material_bed_temperature_layer_0 = 50\\ retraction_combing = infill\\ speed_slowdown_layers = 1\\ support_enable = True\\ support_type = buildplate\\ travel_retract_before_outer_wall = True\\ \\ ", "extruder_quality": ["[general]\\ version = 4\\ name = Benchy Jonas\\ definition = fdmprinter\\ \\ [metadata]\\ setting_version = 6\\ type = quality_changes\\ quality_type = normal\\ position = 0\\ \\ [values]\\ acceleration_infill = 1000\\ acceleration_print = 500\\ acceleration_roofing = 750\\ acceleration_topbottom = 1000\\ acceleration_travel = 1500\\ acceleration_wall_0 = 500\\ acceleration_wall_x = 750\\ alternate_extra_perimeter = False\\ bottom_layers = =999999 if infill_sparse_density == 100 else math.ceil(round(bottom_thickness / resolveOrValue(\'layer_height\'), 4))\\ bottom_skin_preshrink = 1.4\\ bottom_thickness = 1.2\\ bridge_fan_speed = 75\\ bridge_fan_speed_2 = 25\\ bridge_fan_speed_3 = 33\\ brim_line_count = 2\\ brim_outside_only = False\\ coasting_enable = False\\ coasting_speed = 100\\ coasting_volume = 0.02\\ cool_fan_full_layer = 5\\ cool_fan_speed = 75\\ cool_fan_speed_max = =cool_fan_speed\\ cool_min_layer_time = 5\\ cool_min_layer_time_fan_speed_max = 20\\ cool_min_speed = 20\\ default_material_print_temperature = 230\\ fill_outline_gaps = False\\ gradual_infill_step_height = 2\\ gradual_infill_steps = 0\\ gradual_support_infill_step_height = 3\\ gradual_support_infill_steps = 1\\ infill_before_walls = False\\ infill_enable_travel_optimization = True\\ infill_line_distance = =0 if infill_sparse_density == 0 else (infill_line_width * 100) / infill_sparse_density * (2 if infill_pattern == \'grid\' else (3 if infill_pattern == \'triangles\' or infill_pattern == \'trihexagon\' or infill_pattern == \'cubic\' or infill_pattern == \'cubicsubdiv\' else (2 if infill_pattern == \'tetrahedral\' or infill_pattern == \'quarter_cubic\' else (1 if infill_pattern == \'cross\' or infill_pattern == \'cross_3d\' else 1))))\\ infill_line_width = 0.5\\ infill_overlap = 5\\ infill_pattern = gyroid\\ infill_sparse_density = 7\\ infill_support_angle = 75\\ infill_support_enabled = False\\ ironing_flow = 8\\ ironing_inset = 0.25\\ ironing_line_spacing = 0.2\\ jerk_infill = 20\\ jerk_layer_0 = 7\\ jerk_print = 7\\ jerk_roofing = 10\\ jerk_support_infill = 20\\ jerk_support_interface = 20\\ jerk_topbottom = 20\\ jerk_travel = 20\\ jerk_travel_layer_0 = 7\\ jerk_wall_0 = 8\\ jerk_wall_x = 15\\ line_width = =machine_nozzle_size\\ material_diameter = 1.75\\ material_final_print_temperature = =max(-273.15, material_print_temperature - 15)\\ material_flow = 99\\ material_initial_print_temperature = =max(-273.15, material_print_temperature - 10)\\ material_print_temperature = 230\\ material_print_temperature_layer_0 = 230\\ min_infill_area = 10\\ optimize_wall_printing_order = True\\ retract_at_layer_change = False\\ retraction_amount = 0.8\\ retraction_count_max = 100\\ retraction_extra_prime_amount = 0\\ retraction_extrusion_window = =retraction_amount\\ retraction_hop = 0.2\\ retraction_hop_enabled = True\\ retraction_hop_only_when_collides = True\\ retraction_min_travel = 1\\ retraction_prime_speed = 25\\ retraction_retract_speed = 25\\ retraction_speed = 70\\ roofing_layer_count = 0\\ roofing_pattern = concentric\\ skin_no_small_gaps_heuristic = False\\ skin_overlap = =5 if top_bottom_pattern != \'concentric\' else 0\\ skirt_brim_line_width = =line_width\\ skirt_brim_minimal_length = 175\\ skirt_brim_speed = 20\\ skirt_gap = 5\\ skirt_line_count = 3\\ speed_equalize_flow_enabled = False\\ speed_equalize_flow_max = 60\\ speed_infill = 50\\ speed_ironing = 60\\ speed_layer_0 = 20\\ speed_print = 50\\ speed_roofing = 50\\ speed_support = 50\\ speed_support_infill = 60\\ speed_support_interface = 50\\ speed_topbottom = 50\\ speed_travel = 175\\ speed_wall = =speed_print / 2\\ speed_wall_0 = 25\\ speed_wall_x = =speed_wall * 2\\ support_angle = 67\\ support_infill_rate = 10\\ support_infill_sparse_thickness = =resolveOrValue(\'layer_height\')\\ support_interface_density = 50\\ support_interface_enable = True\\ support_interface_pattern = lines\\ support_interface_skip_height = 0.2\\ support_line_width = 0.5\\\\nsupport_minimal_diameter = 2\\ support_offset = 0.4\\ support_pattern = zigzag\\ support_roof_height = 1\\ support_top_distance = =extruderValue(support_roof_extruder_nr if support_roof_enable else support_infill_extruder_nr, \'support_z_distance\')\\ support_tower_diameter = 5\\ support_tower_roof_angle = 30\\ support_use_towers = True\\ support_wall_count = 1\\ support_xy_distance = 0.6\\ support_xy_distance_overhang = 0.5\\ support_xy_overrides_z = xy_overrides_z\\ support_z_distance = 0.2\\ top_bottom_pattern = lines\\ top_bottom_pattern_0 = lines\\ top_bottom_thickness = 1.6\\ top_layers = =0 if infill_sparse_density == 100 else math.ceil(round(top_thickness / resolveOrValue(\'layer_height\'), 4))\\ top_skin_preshrink = 1.2\\ top_thickness = 1.6\\\\ntravel_avoid_other_parts = False\\ travel_avoid_supports = True\\ travel_compensate_overlapping_walls_0_enabled = =travel_compensate_overlapping_walls_enabled\\ travel_compensate_overlapping_walls_enabled = False\\ travel_compensate_overlapping_walls_x_enabled = =travel_compensate_overlapping_walls_enabled\\ wall_0_wipe_dist = =machine_nozzle_size / 2\\ wall_line_count = 3\\ wall_line_width_0 = 0.4\\ wall_line_width_x = =wall_line_width\\ wall_thickness = 2\\ xy_offset_layer_0 = -0.05\\ z_seam_corner = z_seam_corner_inner\\ z_seam_relative = True\\ z_seam_type = back\\ z_seam_x = -250\\ z_seam_y = -30\\ \\ "]} ' # Print the match result str.scan(re) do |match| puts match.to_s end

Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for Ruby, please visit: http://ruby-doc.org/core-2.2.0/Regexp.html