Javascript将PascalCase转换为underscore_case [英] Javascript convert PascalCase to underscore_case

问题描述

如何将PascalCase字符串转换为underscore_case字符串?我还需要将点转换为下划线.

How can I convert PascalCase string into underscore_case string? I need conversion of dots to underscore as well.

例如转换

TypeOfData.AlphaBeta

进入

type_of_data_alpha_beta

推荐答案

您可以尝试以下步骤.

• 捕获所有大写字母并匹配前面的可选点字符.

• Capture all the uppercase letters and also match the preceding optional dot character.

然后将捕获的大写字母转换为小写，然后返回以_作为替换字符的替换功能.这将通过在替换部分中使用匿名功能来实现.

Then convert the captured uppercase letters to lowercase and then return back to replace function with an _ as preceding character. This will be achieved by using anonymous function in the replacement part.

这会将起始大写字母替换为_ + lowercase_letter.

This would replace the starting uppercase letter to _ + lowercase_letter.

最后删除下划线将为您提供所需的输出.

Finally removing the starting underscore will give you the desired output.

var s = 'TypeOfData.AlphaBeta';
console.log(s.replace(/(?:^|\.?)([A-Z])/g, function (x,y){return "_" + y.toLowerCase()}).replace(/^_/, ""));

OR

var s = 'TypeOfData.AlphaBeta';
alert(s.replace(/\.?([A-Z])/g, function (x,y){return "_" + y.toLowerCase()}).replace(/^_/, ""));

在整个单词为大写形式时停止它的任何方法.例如.将MotorRPM替换为motor_rpm而不是motor_r_p_m?或BatteryAAA进入battery_aaa而不是battery_a_a_a?

any way to stop it for when a whole word is in uppercase. eg. MotorRPM into motor_rpm instead of motor_r_p_m? or BatteryAAA into battery_aaa instead of battery_a_a_a?

var s = 'MotorRMP';
alert(s.replace(/\.?([A-Z]+)/g, function (x,y){return "_" + y.toLowerCase()}).replace(/^_/, ""));

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