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我想使用正則表達式搶在JSON數據InvoiceItemID中第一次出現如下圖所示： 
這是正則表達式的字符串，我目前有： \d{6}(?=","Location":"ARN:190801210003100) 目前正則表達式字符串返回兩個匹配，但我只對第一個匹配項有興趣。我明白，我需要做的是使正則表達式非貪婪，通常涉及使用這樣的東西：(.*?)但我不知道在哪裏實現這個非貪婪的代碼。任何幫助，將不勝感激。謝謝。正則表達式的非貪婪範圍的數字
下面是一些原始數據，如果需要測試目的：
{"ClientRef":"","Date":"2015-09-29 10:02:51 AM","InvoiceID":"451393","InvoiceItemID":"495340","Location":"ARN:193602013349538<br\/>16 LEIGHLAND DR , CITY OF MARKHAM, ON, L3R 7R4","ReportID":"268172,","Type":"ICI Commercial \/ Industrial Report"},{"ClientRef":"","Date":"2015-09-28 8:39:41 PM","InvoiceID":"451035","InvoiceItemID":"494939","Location":"ARN:190801210003100<br\/>2250 SHEPPARD AVE W, CITY OF TORONTO, ON, M9M 1L7","ReportID":"267810,","Type":"Basic Report"},{"ClientRef":"","Date":"2015-09-28 8:39:20 PM","InvoiceID":"451034","InvoiceItemID":"494938","Location":"ARN:190801210003100<br\/>2250 SHEPPARD AVE W, CITY OF TORONTO, ON, M9M 1L7","ReportID":"267809,","Type":"ICI Commercial \/ Industrial Report"},{"ClientRef":"","Date":"2015-09-28 2:59:03 PM","InvoiceID":"450515","InvoiceItemID":"494348","Location":"ARN:240201011110900<br\/>26-34 PLAINS RD E, BURLINGTON CITY, ON, L7T 2B9","ReportID":"267272,","Type":"ICI Commercial \/ Industrial Report"}