Need Js code to check pipe "|" present in a string_问答_开发者

Need Js code to check pipe "|" present in a string

开发者 https://www.devze.com 2023-01-04 19:23 出处：网络

相关专题：javascript

can anyone help me out ? THx

Others have already mentioned indexOf where you can do:

<html><body><script type="text/javascript">
    var str="22|Test|Viewed,22|Test|Un-Viewed,22|Test|Viewed";
    document.write(str.indexOf("|Viewed"));
</script></body></html>

but I'd like to also mention a more powerful option (if needed) - you can use the regex string search method:

<html><body><script type="text/javascript">
    var str="22|Test|Viewed,22|Test|Un-Viewed,22|Test|Viewed";
    document.write(str.search("\\|Viewed"));
</script></body></html>

Typing either of these into a file (xx.html) and loading it in your browser, you'll see the number 7 appear which is the first position of the string found. This value is zero-based (0 is the first position) and you'll get back -1 if it cannot be found.

The regex version will allow more complex search patterns, not necessary for this specific case, but you should keep it in mind for when a simple constant string may not suffice.

<html><body><script type="text/javascript">
    var my_string = "22|Test|Viewed,22|Test|Un-Viewed,22|Test|Viewed";
    var the_matchIndex = my_string.indexOf('|Viewed');
    var blMatch = the_matchIndex > -1;
    alert(blMatch ? "Found a match!" : "No match found");
</script></body></html>