[英]Convert string to Pascal Case (aka UpperCamelCase) in Javascript
Id like to know how I can covert a string into a pascal case string in javascript (& most probally regex).我想知道如何将字符串转换为 javascript 中的帕斯卡大小写字符串(很可能是正则表达式)。
Conversion Examples:转换示例:
Check this link for further info on Pascal Case检查此链接以获取有关 Pascal Case 的更多信息
s = s.replace(/(\w)(\w*)/g,
function(g0,g1,g2){return g1.toUpperCase() + g2.toLowerCase();});
The regex finds words (here defined using \w
- alphanumerics and underscores), and separates them to two groups - first letter and rest of the word.正则表达式查找单词(此处使用
\w
- 字母数字和下划线定义),并将它们分成两组 - 第一个字母和单词的其余部分。 It then uses a function as a callback to set the proper case.然后它使用一个函数作为回调来设置正确的大小写。
Example: http://jsbin.com/uvase示例:http: //jsbin.com/uvase
Alternately, this will also work - a little less regex and more string manipulation:或者,这也将起作用 - 少一点正则表达式和更多的字符串操作:
s = s.replace(/\w+/g,
function(w){return w[0].toUpperCase() + w.slice(1).toLowerCase();});
I should add this isn't pascal case at all, since you have word barriers ( helloworld
vs hello-world
).我应该补充一点,这根本不是帕斯卡大小写,因为您有单词障碍(
helloworld
与hello-world
)。 Without them, the problem is almost unsolvable, even with a dictionary.没有它们,即使有字典,问题也几乎无法解决。 This is more commonly called Title Case, though it doesn't handle words like "FBI", "the" or "McDonalds".
这通常被称为 Title Case,尽管它不处理诸如“FBI”、“the”或“McDonalds”之类的词。
Here's my suggestion:这是我的建议:
function toPascalCase(string) {
return `${string}`
.toLowerCase()
.replace(new RegExp(/[-_]+/, 'g'), ' ')
.replace(new RegExp(/[^\w\s]/, 'g'), '')
.replace(
new RegExp(/\s+(.)(\w*)/, 'g'),
($1, $2, $3) => `${$2.toUpperCase() + $3}`
)
.replace(new RegExp(/\w/), s => s.toUpperCase());
}
or或者
String.prototype.toPascalCase = function() {
return this
.toLowerCase()
.replace(new RegExp(/[-_]+/, 'g'), ' ')
.replace(new RegExp(/[^\w\s]/, 'g'), '')
.replace(
new RegExp(/\s+(.)(\w*)/, 'g'),
($1, $2, $3) => `${$2.toUpperCase() + $3}`
)
.replace(new RegExp(/\w/), s => s.toUpperCase());
};
Test cases:测试用例:
describe('String to pascal case', function() {
it('should return a pascal cased string', function() {
chai.assert.equal(toPascalCase('foo bar'), 'FooBar');
chai.assert.equal(toPascalCase('Foo Bar'), 'FooBar');
chai.assert.equal(toPascalCase('fooBar'), 'FooBar');
chai.assert.equal(toPascalCase('FooBar'), 'FooBar');
chai.assert.equal(toPascalCase('--foo-bar--'), 'FooBar');
chai.assert.equal(toPascalCase('__FOO_BAR__'), 'FooBar');
chai.assert.equal(toPascalCase('!--foo-¿?-bar--121-**%'), 'FooBar121');
chai.assert.equal(toPascalCase('Here i am'), 'HereIAm');
chai.assert.equal(toPascalCase('FOO BAR'), 'FooBar');
});
});
const toPascalCase = (sentence) => sentence
.split(' ')
.map(word => word[0]
.toUpperCase()
.concat(word.slice(1)))
.join('');
toPascalCase(words);
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