var attrArray = new Array(); var attrValueMap = {}; attrValueMap['プライマー込み'] = '1086 '; attrValueMap['質量(g)'] = '71 '; attrArray.push(attrValueMap); console.log("attrArray : "+attrArray.length); var attrValueMap = {}; attrValueMap['プライマー込み'] = 'No '; attrValueMap['質量(g)'] = '71 '; attrArray.push(attrValueMap); console.log("attrArray : "+attrArray.length); var attrValueMap = {}; attrValueMap['プライマー込み'] = '1086 '; attrValueMap['質量(g)'] = '284 '; attrArray.push(attrValueMap); console.log("attrArray : "+attrArray.length);