| 1 |
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| 2 | var Gun = require('./root');
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| 3 | Gun.chain.back = function(n, opt){ var tmp;
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| 4 | if(-1 === n || Infinity === n){
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| 5 | return this._.root;
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| 6 | } else
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| 7 | if(1 === n){
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| 8 | return this._.back || this;
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| 9 | }
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| 10 | var gun = this, at = gun._;
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| 11 | if(typeof n === 'string'){
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| 12 | n = n.split('.');
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| 13 | }
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| 14 | if(n instanceof Array){
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| 15 | var i = 0, l = n.length, tmp = at;
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| 16 | for(i; i < l; i++){
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| 17 | tmp = (tmp||empty)[n[i]];
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| 18 | }
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| 19 | if(u !== tmp){
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| 20 | return opt? gun : tmp;
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| 21 | } else
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| 22 | if((tmp = at.back)){
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| 23 | return tmp.back(n, opt);
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| 24 | }
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| 25 | return;
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| 26 | }
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| 27 | if(n instanceof Function){
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| 28 | var yes, tmp = {back: gun};
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| 29 | while((tmp = tmp.back)
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| 30 | && (tmp = tmp._)
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| 31 | && !(yes = n(tmp, opt))){}
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| 32 | return yes;
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| 33 | }
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| 34 | }
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| 35 | var empty = {}, u;
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| 36 | |
| \ | No newline at end of file |