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Combines two dictionaries. In the case of duplicate names, the output will contain the value of the second dictionary unless overwrite is false. Null values in both dictionaries are ignored / removed.
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Missing the information I need","missingTheInformationINeed","thumb-down"],["Too complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2024-07-13 UTC."],[[["\u003cp\u003e\u003ccode\u003eDictionary.combine()\u003c/code\u003e merges two dictionaries into a single dictionary.\u003c/p\u003e\n"],["\u003cp\u003eIf the same key exists in both dictionaries, the value from the second dictionary is used by default, unless \u003ccode\u003eoverwrite\u003c/code\u003e is set to \u003ccode\u003efalse\u003c/code\u003e.\u003c/p\u003e\n"],["\u003cp\u003eNull values present in either of the input dictionaries are automatically excluded from the final combined dictionary.\u003c/p\u003e\n"],["\u003cp\u003eIt's accessible in both JavaScript and Python environments within the Earth Engine platform.\u003c/p\u003e\n"]]],[],null,["# ee.Dictionary.combine\n\nCombines two dictionaries. In the case of duplicate names, the output will contain the value of the second dictionary unless overwrite is false. Null values in both dictionaries are ignored / removed.\n\n\u003cbr /\u003e\n\n| Usage | Returns |\n|---------------------------------------------|------------|\n| Dictionary.combine`(second, `*overwrite*`)` | Dictionary |\n\n| Argument | Type | Details |\n|---------------|------------------------|---------|\n| this: `first` | Dictionary | |\n| `second` | Dictionary | |\n| `overwrite` | Boolean, default: true | |\n\nExamples\n--------\n\n### Code Editor (JavaScript)\n\n```javascript\n// A dictionary (e.g. results of ee.Image.reduceRegion of an S2 image).\nvar dict1 = ee.Dictionary({\n B1: 182,\n B2: 219,\n B3: 443\n});\n\n// A second dictionary.\nvar dict2 = ee.Dictionary({\n Region: 'The Forest of Nisene Marks State Park',\n Image: 'Sentinel-2 surface reflectance (scaled by 1e4)',\n B1: -9999 // Note that the B1 key is present in both dictionaries.\n});\n\nprint('Combined dictionaries (overwrite false)',\n dict1.combine(dict2, false));\n\nprint('Combined dictionaries (overwrite true)',\n dict1.combine(dict2, true));\n```\nPython setup\n\nSee the [Python Environment](/earth-engine/guides/python_install) page for information on the Python API and using\n`geemap` for interactive development. \n\n```python\nimport ee\nimport geemap.core as geemap\n```\n\n### Colab (Python)\n\n```python\nimport pprint\n\n# A dictionary (e.g. results of ee.Image.reduceRegion of an S2 image).\ndic_1 = ee.Dictionary({\n 'B1': 182,\n 'B2': 219,\n 'B3': 443\n})\n\n# A second dictionary.\ndic_2 = ee.Dictionary({\n 'Region': 'The Forest of Nisene Marks State Park',\n 'Image': 'Sentinel-2 surface reflectance (scaled by 1e4)',\n 'B1': -9999 # Note that the B1 key is present in both dictionaries.\n})\n\nprint('Combined dictionaries (overwrite false)')\npprint.pprint(dic_1.combine(dic_2, False).getInfo())\n\nprint('\\nCombined dictionaries (overwrite true)')\npprint.pprint(dic_1.combine(dic_2, True).getInfo())\n```"]]
