if (len === 0) return [];
德索托在调研中估算，发展中国家穷人手中的“沉睡资产”总额高达数万亿美元。这些资产存在，却无法流动、无法创造财富。问题不在于穷人懒惰或愚蠢，而在于制度将他们排除在资本体系之外。
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Compared to the cryptic stack traces common in imperative code, this execution trace makes the source of the error immediately obvious.
var findNextGreater = function (nums) {
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The vaccine doesn't guarantee lifetime immunity, but it does greatly reduce the risk of someone developing chickenpox or having a bad case.