问在Angular2上替换字符串数组中的字符串

EN

var segment=['age','Nationality','gender'];

var changed = segment.map(seg => seg.replace('age', 'agexx') );


console.log('Original --->' ,segment);
console.log('Changed --->' ,changed);

for(var i=0; i < this.segment.length; i++) {
 this.segment[i] = this.segment[i].replace('age', 'agexx');
}

let a = ['age','hello','world']
a.splice(0, 1,'agexxx');
alert(a)