字符串 ‘A’
数组 arr=['Q','C','D','E','A','B'];
怎么查找字符串在第几个位置?
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<script>var arr = ['asdf','bsdfs','csdfsd','dasdfs','egdfhd'];
var locationArr = [];
for(var i=0;i<arr.length;i++){
if(arr[i].indexOf('csdf') >= 0){
locationArr.push(i);
}
}
console.log(locationArr); //è¿ä¸ªlocationArréé¢åè´®çå°±æ¯ææåºç°å符串çæ°ç»ä¸çä½ç½®äºã
</script>
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第1个回答 推荐于2016-06-15
<script type="text/javascript">
window.onload = function() {
var arr=['Q','C','D','E','Aas','B'];
alert(arr.indexOf("Aas")); //输出4。即匹配到arr[4],数组里的第五个
};
</script>本回答被提问者采纳
window.onload = function() {
var arr=['Q','C','D','E','Aas','B'];
alert(arr.indexOf("Aas")); //输出4。即匹配到arr[4],数组里的第五个
};
</script>本回答被提问者采纳
第2个回答 2015-06-02
indexOf()和lastIndexOf()