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test_array_map.js

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// test array map

var a = [2,3,4,5];

var r1 = a.map(function(x) {return x*2;});

var o = { z:3 };

var r2 = a.map(function(x) {return x*this.z;},o);

function eq(a,b) {

for (var i=0;i<4;i++)

if (a[i]!=b[i]) return false;

return true;

}

var mismatch = 0;

var r3 = a.map(function(x, idx, arr) {mismatch |= !eq(arr,a); return idx+1;});

result = eq(r1,[4,6,8,10]) && eq(r2,[6,9,12,15]) && eq(r3,[1,2,3,4]) &&

!mismatch;