var s = "The rain in Spain falls mainly in the plain.";
ss = s.substr(12, 5); // 获取子字符串。
document.write('substr--->'+ss)
document.write('<br>')
document.write('substring----->'+s.substring(12,5))
document.write('<br>')
document.write('slice----->'+s.slice(12,5))
/*////////
(12,5)
substr--->Spain
substring----->ain in
slice----->
(12,-5)
substr--->
substring----->The rain in
slice----->Spain falls mainly in the p
ss = s.substr(12, 5); // 获取子字符串。
document.write('substr--->'+ss)
document.write('<br>')
document.write('substring----->'+s.substring(12,5))
document.write('<br>')
document.write('slice----->'+s.slice(12,5))
/*////////
(12,5)
substr--->Spain
substring----->ain in
slice----->
(12,-5)
substr--->
substring----->The rain in
slice----->Spain falls mainly in the p
解决方案 »
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