按索引删除

//1
someArray.shift(); // 删除第一个元素
//2
someArray = someArray.slice(1); // 删除第一个元素
//3
someArray.splice(0,1); // 删除第一个元素
//4
someArray.pop(); // 删除最后一个元素

按条件删除

someArray = [{name:"Kristian", lines:"2,5,10"},
             {name:"John", lines:"1,19,26,96"},
             {name:"Brian",lines:"3,9,62,36" }];
johnRemoved = someArray.filter(function(el) {
    return el.name !== "John";
});

console.log(JSON.stringify(johnRemoved, null, ' '));