如果是负数,那么该参数声明从字符串的尾部开始算起的位置。也就是说,-1指字符串中最后一个字符,-2指倒数第二个字符,以此类推。 length: 可选。字串中的字符数,必须是数值,如果省略了该参数,那么返回从stringObject的开始位置到结束的字符串。 返回值: 一个新的字符串,包含从stringObject的start处开始的length...
该方法的示例如下: {//删除数组中从第2个下标开始的到最后的所有元素letarr1=["a","b","c","d","e"];letarr2=arr1.splice(2);console.log(arr1);// ["a", "b"] 原始数组被该改变console.log(arr2);// ["c", "d", "e"]}{//往新数组中添加一个元素"YY"letarr3=["a","b",...
2.如果 end 未被规定,那么 slice() 方法会选取从 start 到数组结尾的所有元素。 3.如果start是正数且大于arrayObject.length,则返回[]空数组。如果start是负数且绝对值大于arrayObject.length,则当0处理。 实例: var arr = [1, 2, 3, 4, 5]; var arrNew = arr.slice(1,3); console.log(arr); //...
具体过程看下面代码： #import <Foundation/Founda
参数2就是指定后面的长度,如果不填写的话就默认到最后 在真实项目中可以用它来解决url参数取值问题,上代码: split获取url参数 五、replace:就是进行字符串中的替换功能 语法:str.replace("需要替换的内容,正则匹配"," 代替的内容 "); 参数就是上面对应的俩个,而且都是必添项 ...
Nature chemical biology corrections CORRIGENDUM SMN2 splice modulators enhance U1-pre-mRNA association and rescue SMA mice James Palacino, Susanne E Swalley, Cheng Song, Atwood K Cheung, Lei Shu, Xiaolu Zhang, Mailin Van Hoosear, Youngah Shin, Donovan N Chin, Caroline Gubser Keller, Martin ...
// 情况2: 如果输出端是一个管道? pipe = pipe_info(out->f_path.dentry->d_inode); if(pipe) { ... // 调用 do_splice_to 函数将文件内容与管道绑定 ret = do_splice_to(in, off, pipe, len, flags); ... returnret; } return-EINVAL; ...
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