遍历 JSON 数组：

var questions = data.data.questionnaire.questions;
    //遍历 json 数组
    for (var i in questions) {
        if (questions[i].type == '(单选)') {
            alert('danxuan');
        }
    }

获取 JSON 数组长度：

function getJsonLength(json) {
    var jsonLength = 0;
    for (var i in json) {
        jsonLength++;
    }
    return jsonLength;
}
# javascript # json
GitHub 加速计划 / js / json
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适用于现代 C++ 的 JSON。
最近提交(Master分支：3 个月前 )
2134cb94 * change NLOHMANN_JSON_FROM_WITH_DEFAULT to let NLOHMANN_DEFINE_TYPE_INTRUSIVE_WITH_DEFAULT work with an empty JSON instance * fix ci_static_analysis_clang (ci_clang_tidy) * change NLOHMANN_JSON_FROM_WITH_DEFAULT to let NLOHMANN_DEFINE_TYPE_INTRUSIVE_WITH_DEFAULT work with an empty JSON instance 8 天前
6057b31d * :wrench: overwork astyle call * :wrench: overwork astyle call * :wrench: overwork astyle call * :wrench: overwork astyle call * :wrench: overwork astyle call * :wrench: overwork astyle call * :wrench: overwork astyle call * :wrench: overwork astyle call * :wrench: overwork astyle call * :wrench: overwork astyle call * :wrench: overwork astyle call * Use ubuntu-latest image to run Valgrind (#4575) * :wrench: use Clang image to run valgrind * :wrench: use Clang image to run valgrind * :wrench: use Clang image to run valgrind * :wrench: use Ubuntu image to run valgrind * Use Clang image to run iwyu (#4574) * :wrench: use Clang image to run iwyu * :wrench: use Clang image to run iwyu * :wrench: overwork astyle call * :wrench: overwork astyle call * :wrench: overwork astyle call * :wrench: overwork astyle call * :wrench: overwork astyle call * :wrench: overwork astyle call * :wrench: overwork astyle call * :wrench: overwork astyle call * :wrench: overwork astyle call * :wrench: overwork astyle call * :wrench: overwork astyle call * :art: format code * :hammer: clean up 10 天前
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