Closed
Bug 614896
Opened 14 years ago
Closed 14 years ago
Could Array.some return the matched element instead of true or false?
Categories
(Core :: JavaScript Engine, enhancement)
Core
JavaScript Engine
Tracking
()
RESOLVED
INVALID
People
(Reporter: tabutils+bugzilla, Unassigned)
Details
User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; zh-CN; rv:1.9.2.12) Gecko/20101026 Firefox/3.6.12 (.NET CLR 3.5.30729) Build Identifier: Sometimes it is needed to find the first element matching a condition in an array, but I don't want to iterate over the whole array. Array.some will be helpful if it returns the matched element or null instead of true or false. Reproducible: Always
No, because the thing that "some" is matching could itself be false! arr = [true, true, true, false]; arr.some(function (v) { return v == false; }) === true; If you want to capture the value, I would recommend doing this: var first; if (arr.some(function (v) { first = v; return condition(v); })) { /* do something with first */ }
Status: UNCONFIRMED → RESOLVED
Closed: 14 years ago
Resolution: --- → INVALID
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Description
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