"fat arrow" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "fat",
        "3": "arrow"
      },
      "expansion": "fat + arrow",
      "name": "compound"
    },
    {
      "args": {
        "1": "->"
      },
      "expansion": "->",
      "name": "monospace"
    }
  ],
  "etymology_text": "fat + arrow, because of its thickness compared to ->.",
  "forms": [
    {
      "form": "fat arrows",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "fat arrow (plural fat arrows)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Computing",
          "orig": "en:Computing",
          "parents": [
            "Technology",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "2013, Mark E. Daggett, Expert JavaScript, page 39",
          "text": "The fat arrow is a new shorter way to write functions using '=>' instead of 'function() {}', and will look familiar to anyone who has used CoffeeScript.",
          "type": "quotation"
        },
        {
          "ref": "2013, Peter Scott, Perl Medic: Transforming Legacy Code, page 78",
          "text": "A constant can't be used on the left-hand side of a fat arrow (=>) because that turns it into a string.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "The => symbol, which has specific meanings in various programming languages."
      ],
      "id": "en-fat_arrow-en-noun-POd70SFG",
      "links": [
        [
          "computing",
          "computing#Noun"
        ]
      ],
      "raw_glosses": [
        "(computing) The => symbol, which has specific meanings in various programming languages."
      ],
      "topics": [
        "computing",
        "engineering",
        "mathematics",
        "natural-sciences",
        "physical-sciences",
        "sciences"
      ]
    }
  ],
  "word": "fat arrow"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "fat",
        "3": "arrow"
      },
      "expansion": "fat + arrow",
      "name": "compound"
    },
    {
      "args": {
        "1": "->"
      },
      "expansion": "->",
      "name": "monospace"
    }
  ],
  "etymology_text": "fat + arrow, because of its thickness compared to ->.",
  "forms": [
    {
      "form": "fat arrows",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "fat arrow (plural fat arrows)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English compound terms",
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English terms with quotations",
        "en:Computing"
      ],
      "examples": [
        {
          "ref": "2013, Mark E. Daggett, Expert JavaScript, page 39",
          "text": "The fat arrow is a new shorter way to write functions using '=>' instead of 'function() {}', and will look familiar to anyone who has used CoffeeScript.",
          "type": "quotation"
        },
        {
          "ref": "2013, Peter Scott, Perl Medic: Transforming Legacy Code, page 78",
          "text": "A constant can't be used on the left-hand side of a fat arrow (=>) because that turns it into a string.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "The => symbol, which has specific meanings in various programming languages."
      ],
      "links": [
        [
          "computing",
          "computing#Noun"
        ]
      ],
      "raw_glosses": [
        "(computing) The => symbol, which has specific meanings in various programming languages."
      ],
      "topics": [
        "computing",
        "engineering",
        "mathematics",
        "natural-sciences",
        "physical-sciences",
        "sciences"
      ]
    }
  ],
  "word": "fat arrow"
}