- arr.indexOf( searchElement[, formindex=0] )
var telephones = [110,120,114];
telephones.indexOf(120); // => 1
telephones.indexOf(119); // => -1 - arr.forEach( callback[, thisArg] )
var students = [
{id: 1, score: 80},
{id: 2, score: 50},
{id: 3, score: 70}
];
var editScore = function (item, index, array) {
item.score += 5;
};
students.forEach(editScore);
students[0].score; // => 85 - arr.reverse()
var students = [
{id: 1, score: 80},
{id: 2, score: 50},
{id: 3, score: 70}
];
students.reverse();
students[0].score; // => 70 - arr.sort( [compareFunction] )
var students = [
{id: 1, score: 80},
{id: 2, score: 50},
{id: 3, score: 70}
];
var byScore = function (a, b) {
return b.score - a.score;
}
/*
[
{id: 1, score: 80},
{id: 2, score: 50},
{id: 3, score: 70}
];
*/ - arr.push( element1, ..., elementN )
var students = [
{id: 1, score: 80},
{id: 2, score: 50},
{id: 3, score: 70}
];
students.push({id: 4, score: 90});
/*
[
{id: 1, score: 80},
{id: 2, score: 50},
{id: 3, score: 70},
{id: 4, score: 90}
];
*/ - arr.unshift( element1, ..., elementN )
var students = [
{id: 1, score: 80},
{id: 2, score: 50},
{id: 3, score: 70}
];
students.unshift({id: 4, score: 90});
/*
[
{id: 4, score: 90}
{id: 1, score: 80},
{id: 2, score: 50},
{id: 3, score: 70}
];
*/ - arr.shift()
var students = [
{id: 1, score: 80},
{id: 2, score: 50},
{id: 3, score: 70}
];
students.shift();
/*
[
{id: 2, score: 50},
{id: 3, score: 70}
];
*/ - arr.pop()
var students = [
{id: 1, score: 80},
{id: 2, score: 50},
{id: 3, score: 70}
];
students.pop();
/*
[
{id: 1, score: 80},
{id: 2, score: 50}
];
*/ - srr.splice( index, howMany[, ele1[, ...[, eleN]]] )
var students = [
{id: 1, score: 80},
{id: 2, score: 50},
{id: 3, score: 70}
];
students.splice(1, 1, {id: 4, score: 90});
/*
[
{id: 1, score: 80},
{id: 4, score: 90},
{id: 3, score: 70}
];
/
students.splice(1, 0, {id: 4, score: 90});
/
[
{id: 1, score: 80},
{id: 4, score: 90},
{id: 2, score: 50},
{id: 3, score: 70}
];
/
students.splice(1, 1);
/
[
{id: 1, score: 80},
{id: 3, score: 70}
];
*/
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