公告:所有在
2025 年 4 月 15 日之前注册使用 Earth Engine 的非商业项目都必须
验证是否符合非商业性质的资格条件,才能继续使用 Earth Engine。
ee.Number.parse
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。
将字符串转换为数字。
用法 | 返回 |
---|
ee.Number.parse(input, radix) | 数字 |
参数 | 类型 | 详细信息 |
---|
input | 字符串 | 要转换为数字的字符串。 |
radix | 整数,默认值:10 | 一个整数,表示要转换的基数系统。如果输入不是整数,则基数必须等于 10 或未指定。 |
示例
代码编辑器 (JavaScript)
print('Client-side string converted to ee.Number',
ee.Number.parse('10')); // 10
print('ee.String converted to ee.Number',
ee.Number.parse(ee.String('100'))); // 100
print('Ambiguous string object converted to ee.Number',
ee.Number.parse(ee.Feature(null, {id: '1000'}).get('id'))); // 1000
print('Ambiguous number object converted to ee.Number',
ee.Number.parse(ee.Feature(null, {id: 1000}).get('id'))); // 1000
print('Leading zeros are removed',
ee.Number.parse('0001')); // 1
print('Radix 16',
ee.Number.parse('3E8', 16)); // 1000
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)
print('Client-side string converted to ee.Number:',
ee.Number.parse('10').getInfo()) # 10
print('ee.String converted to ee.Number:',
ee.Number.parse(ee.String('100')).getInfo()) # 100
# 1000
print('Ambiguous string object converted to ee.Number:',
ee.Number.parse(ee.Feature(None, {'id': '1000'}).get('id')).getInfo())
print('Leading zeros are removed:',
ee.Number.parse('0001').getInfo()) # 1
print('Radix 16:', ee.Number.parse('3E8', 16).getInfo()) # 1000
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):2025-07-26。
[null,null,["最后更新时间 (UTC):2025-07-26。"],[[["\u003cp\u003e\u003ccode\u003eee.Number.parse()\u003c/code\u003e converts a string to an Earth Engine Number object.\u003c/p\u003e\n"],["\u003cp\u003eThe function accepts an optional \u003ccode\u003eradix\u003c/code\u003e argument for specifying the base of the number system (default is 10).\u003c/p\u003e\n"],["\u003cp\u003eLeading zeros in the input string are automatically removed during conversion.\u003c/p\u003e\n"],["\u003cp\u003eThe function can handle various input types like client-side strings, Earth Engine Strings, and values retrieved from Earth Engine features.\u003c/p\u003e\n"]]],["`ee.Number.parse()` converts a string to a number. It accepts a string `input` and an optional `radix` (default 10), representing the base of the number system. If the input isn't an integer, radix must be 10 or unspecified. Leading zeros are removed during conversion. The examples show parsing client-side strings, `ee.String` objects, and ambiguous objects, both in JavaScript and Python. Base 16 conversions using radix are also shown.\n"],null,["# ee.Number.parse\n\nConvert a string to a number.\n\n\u003cbr /\u003e\n\n| Usage | Returns |\n|-------------------------------------|---------|\n| `ee.Number.parse(input, `*radix*`)` | Number |\n\n| Argument | Type | Details |\n|----------|----------------------|--------------------------------------------------------------------------------------------------------------------------------------------|\n| `input` | String | The string to convert to a number. |\n| `radix` | Integer, default: 10 | An integer representing the base number system from which to convert. If input is not an integer, radix must equal 10 or not be specified. |\n\nExamples\n--------\n\n### Code Editor (JavaScript)\n\n```javascript\nprint('Client-side string converted to ee.Number',\n ee.Number.parse('10')); // 10\n\nprint('ee.String converted to ee.Number',\n ee.Number.parse(ee.String('100'))); // 100\n\nprint('Ambiguous string object converted to ee.Number',\n ee.Number.parse(ee.Feature(null, {id: '1000'}).get('id'))); // 1000\n\nprint('Ambiguous number object converted to ee.Number',\n ee.Number.parse(ee.Feature(null, {id: 1000}).get('id'))); // 1000\n\nprint('Leading zeros are removed',\n ee.Number.parse('0001')); // 1\n\nprint('Radix 16',\n ee.Number.parse('3E8', 16)); // 1000\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\nprint('Client-side string converted to ee.Number:',\n ee.Number.parse('10').getInfo()) # 10\n\nprint('ee.String converted to ee.Number:',\n ee.Number.parse(ee.String('100')).getInfo()) # 100\n\n# 1000\nprint('Ambiguous string object converted to ee.Number:',\n ee.Number.parse(ee.Feature(None, {'id': '1000'}).get('id')).getInfo())\n\nprint('Leading zeros are removed:',\n ee.Number.parse('0001').getInfo()) # 1\n\nprint('Radix 16:', ee.Number.parse('3E8', 16).getInfo()) # 1000\n```"]]