ee.Number.toLong

将输入值转换为有符号 64 位整数。

用法返回
Number.toLong()数字
参数类型详细信息
此：input数字输入值。

示例

代码编辑器 (JavaScript)

// Declare an ee.Number.
var number = ee.Number(100);
print('ee.Number:', number);

// Cast a number to signed 64-bit integer.
var longNumber = number.toLong();
print('ee.Number cast to long:', longNumber);


/**
* Casting numbers to long that are outside of its range and precision can
* modify the resulting value, note the behavior of the following scenarios.
*/

// A floating point number cast to long loses decimal precision.
var float = ee.Number(1.7);
print('Floating point value:', float);

var floatToLong = float.toLong();
print('Floating point value cast to long:', floatToLong);

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)

# Declare an ee.Number.
number = ee.Number(100)
print('ee.Number:', number.getInfo())

# Cast a number to signed 64-bit integer.
long_number = number.toLong()
print('ee.Number cast to long:', long_number.getInfo())


"""Casting numbers to long that are outside of its range and precision can
modify the resulting value, note the behavior of the following scenarios.
"""

# A floating point number cast to long loses decimal precision.
float_number = ee.Number(1.7)
print('Floating point value:', float_number.getInfo())

float_to_long = float_number.toLong()
print('Floating point value cast to long:', float_to_long.getInfo())