[英]How to get index of matched element from json object?
var formRenderData = [{
"type": "checkbox-group",
"label": "Checkbox Group",
"className": "checkbox-group",
"name": "checkbox-group-1479370460494",
"values": [{
"label": "Option 1",
"value": "option-1",
"selected": true
}, {
"label": "Option 2",
"value": "option-2"
}, {
"label": "Option 3",
"value": "option-3"
}]
}, {
"type": "paragraph",
"subtype": "p",
"label": "Paragraph",
"className": "paragraph"
}];
我正在使用grep来匹配对象。
var InputName = 'checkbox-group-1479370460494';
var InputType = 'checkbox-group';
var returnedIndex = $.grep(formRenderData, function(element, index){
if(( (element.name == InputName) || (element.label == InputName)|| (element.name == InputName.substr(0,InputName.length - 2)) ) && element.type == InputType){
return index;
}
});
console.log(returnedIndex);
jQuery.grep
过滤一个数组,返回满足过滤功能的项目列表,同时保持原始数组不变。 (请参阅jQuery文档 。)
我不确定您为什么要访问索引; 我假设您想访问满足过滤条件的原始对象。 这可以通过从过滤器函数返回true
,然后循环遍历matchs数组来实现。
var InputName = 'checkbox-group-1479370460494'; var InputType = 'checkbox-group'; var formRenderData = [{"type": "checkbox-group","label": "Checkbox Group","className": "checkbox-group","name": "checkbox-group-1479370460494","values": [{"label": "Option 1","value": "option-1","selected": true},{"label": "Option 2","value": "option-2"},{"label": "Option 3","value": "option-3"}]},{"type": "paragraph","subtype": "p","label": "Paragraph","className": "paragraph"}] var matches = $.grep(formRenderData, function(element, index){ if(( (element.name == InputName) || (element.label == InputName)|| (element.name == InputName.substr(0,InputName.length - 2)) ) && element.type == InputType){ return true } }); console.log(matches); // [Array]
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