<html><head><style>body{font-family:Helvetica,Arial;font-size:13px}</style></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;"><div id="bloop_customfont" style="font-family:Helvetica,Arial;font-size:13px; color: rgba(0,0,0,1.0); margin: 0px; line-height: auto;">Please excuse the horrible grammar. I got distracted, then hit send before reviewing :-p. Retyping the first two sentences below.</div><div id="bloop_customfont" style="font-family:Helvetica,Arial;font-size:13px; color: rgba(0,0,0,1.0); margin: 0px; line-height: auto;"><br></div><div id="bloop_customfont" style="font-family:Helvetica,Arial;font-size:13px; color: rgba(0,0,0,1.0); margin: 0px; line-height: auto;">There are actually two other benefits, which I think have been implied by the other answers on this thread. However, let me elaborate on them. There are a few benefits of keeping data at your lower layers immutable, and handling the mutability at an outer layer.</div><p class="airmail_on" style="color:#000;">On 9 September 2015 at 8:55:32 pm, Jonathon Horsman (<a href="mailto:jonathon@arctickiwi.com">jonathon@arctickiwi.com</a>) wrote:</p> <blockquote type="cite" class="clean_bq"><span><div><span style="color: rgb(0, 0, 0); font-family: Helvetica, Arial; font-size: 12.727272033691406px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: 19.5px; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; display: inline !important; float: none;">There is actually two other benefits, but which I think has been implied by other answers, but I thought I’ll elaborate here.</span></div></span></blockquote> <div id="bloop_sign_1441813823299178240" class="bloop_sign"><div style="font-family:helvetica,arial;font-size:13px"><div>-- </div><div>Tejas Dinkar</div><div>Quintype</div><div>ph: +91 98455 72696</div><div>skype: tdinkar</div></div></div></body></html>