| 348 | */ |
| 349 | |
| 350 | function scopePaths(array, fields, init) { |
| 351 | if (!(init && fields)) { |
| 352 | return undefined; |
| 353 | } |
| 354 | |
| 355 | var path = array.path + '.'; |
| 356 | var keys = Object.keys(fields); |
| 357 | var i = keys.length; |
| 358 | var selected = {}; |
| 359 | var hasKeys; |
| 360 | var key; |
| 361 | var sub; |
| 362 | |
| 363 | while (i--) { |
| 364 | key = keys[i]; |
| 365 | if (key.indexOf(path) === 0) { |
| 366 | sub = key.substring(path.length); |
| 367 | if (sub === '$') { |
| 368 | continue; |
| 369 | } |
| 370 | if (sub.indexOf('$.') === 0) { |
| 371 | sub = sub.substr(2); |
| 372 | } |
| 373 | hasKeys || (hasKeys = true); |
| 374 | selected[sub] = fields[key]; |
| 375 | } |
| 376 | } |
| 377 | |
| 378 | return hasKeys && selected || undefined; |
| 379 | } |
| 380 | |
| 381 | /*! |
| 382 | * Module exports. |