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function check(str,matchstr,time){
var reg=new RegExp(`^(?:.*?${matchstr}.*?){${time}}$`);
return reg.test(str);
}
var arr=[
'happyhappyhappy123456789happy',
'happy12tgdfg789happyhappyhappy',
'happyhappy1sdf56789happyhappy'
]
console.log(arr.map(function(item){
return check(item,'happy',3);
}));
console.log(arr.map(function(item){
return check(item,'happy',4);
}));
console.log(arr.map(function(item){
return check(item,'happy',5);
}));
大于等于