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ee.Dictionary.aside
使用集合让一切井井有条
根据您的偏好保存内容并对其进行分类。
调用一个函数，将此对象作为第一个实参传递，并返回自身。方便（例如，在调试时）：
var c = ee.ImageCollection('foo').aside(print)
.filterDate('2001-01-01', '2002-01-01').aside(print, 'In 2001')
.filterBounds(geom).aside(print, 'In region')
.aside(Map.addLayer, {min: 0, max: 142}, 'Filtered')
.select('a', 'b');
返回同一对象，用于链式调用。
| 用法 | 返回 |
|---|
Dictionary.aside(func, var_args) | ComputedObject |
| 参数 | 类型 | 详细信息 |
|---|
此：computedobject | ComputedObject | ComputedObject 实例。 |
func | 函数 | 要调用的函数。 |
var_args | VarArgs<Object> | 要传递给函数的任何额外实参。 |
示例
代码编辑器 (JavaScript)
// A dictionary (e.g. results of ee.Image.reduceRegion of an S2 image).
var dict = {
B1: 182,
B2: 219,
B3: 443
};
// Print a message when constructing the ee.Dictionary.
var eeDict = ee.Dictionary(dict).aside(print, 'ee.Dictionary from an object');
Python 设置
如需了解 Python API 和如何使用 geemap 进行交互式开发，请参阅
Python 环境页面。
import ee
import geemap.core as geemap
Colab (Python)
# A dictionary (e.g. results of ee.Image.reduceRegion of an S2 image).
dic = {
'B1': 182,
'B2': 219,
'B3': 443
}
def print_dic(dic):
"""Prints the dictionary."""
print('ee.Dictionary from client-side dictionary:', dic.getInfo())
# Print a message when constructing the ee.Dictionary.
ee_dic = ee.Dictionary(dic).aside(print_dic)
如未另行说明，那么本页面中的内容已根据知识共享署名 4.0 许可获得了许可，并且代码示例已根据 Apache 2.0 许可获得了许可。有关详情，请参阅 Google 开发者网站政策。Java 是 Oracle 和/或其关联公司的注册商标。
最后更新时间 (UTC)：2025-07-25。
[null,null,["最后更新时间 (UTC)：2025-07-25。"],[[["\u003cp\u003e\u003ccode\u003easide()\u003c/code\u003e is a method that allows calling a function with the current object as the first argument, without altering the object itself, enabling debugging or side effects like adding to the map.\u003c/p\u003e\n"],["\u003cp\u003eIt takes a function as its primary argument, followed by any additional arguments that should be passed to the function, facilitating flexibility in its application.\u003c/p\u003e\n"],["\u003cp\u003eThis method returns the original object, making it seamlessly chainable with other Earth Engine operations for concise and readable code.\u003c/p\u003e\n"],["\u003cp\u003eThe method can be used with various Earth Engine objects, including \u003ccode\u003eee.ImageCollection\u003c/code\u003e and \u003ccode\u003eee.Dictionary\u003c/code\u003e, as demonstrated in the examples.\u003c/p\u003e\n"]]],["The `aside` function calls a specified function, passing the current object as the first argument, and then returns the original object. This allows for chaining operations, particularly useful for debugging. It accepts a function and optional extra arguments to pass to that function. In the examples, `aside` is used to print a message or add a layer during image collection filtering, and dictionary creation, with the `print` or `print_dic` function. It can use different type of data like `ee.Dictionary` or `ee.ImageCollection`.\n"],null,["# ee.Dictionary.aside\n\n\u003cbr /\u003e\n\nCalls a function passing this object as the first argument, and returning itself. Convenient e.g. when debugging:\n\n\u003cbr /\u003e\n\nvar c = ee.ImageCollection('foo').aside(print)\n\n.filterDate('2001-01-01', '2002-01-01').aside(print, 'In 2001')\n\n.filterBounds(geom).aside(print, 'In region')\n\n.aside(Map.addLayer, {min: 0, max: 142}, 'Filtered')\n\n.select('a', 'b');\n\nReturns the same object, for chaining.\n\n| Usage | Returns |\n|------------------------------------|----------------|\n| Dictionary.aside`(func, var_args)` | ComputedObject |\n\n| Argument | Type | Details |\n|------------------------|-------------------|----------------------------------------------|\n| this: `computedobject` | ComputedObject | The ComputedObject instance. |\n| `func` | Function | The function to call. |\n| `var_args` | VarArgs\\\u003cObject\\\u003e | Any extra arguments to pass to the function. |\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 dict = {\n B1: 182,\n B2: 219,\n B3: 443\n};\n\n// Print a message when constructing the ee.Dictionary.\nvar eeDict = ee.Dictionary(dict).aside(print, 'ee.Dictionary from an object');\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\n# A dictionary (e.g. results of ee.Image.reduceRegion of an S2 image).\ndic = {\n 'B1': 182,\n 'B2': 219,\n 'B3': 443\n}\n\n\ndef print_dic(dic):\n \"\"\"Prints the dictionary.\"\"\"\n print('ee.Dictionary from client-side dictionary:', dic.getInfo())\n\n# Print a message when constructing the ee.Dictionary.\nee_dic = ee.Dictionary(dic).aside(print_dic)\n```"]]
