Jquery processes strings

1. Remove spaces.

   txt=$.trim($("txt1").val());

2. convert it to a number.

 txtNum=Number($.trim(txt)) + 1  thisEle = $("#para").css("font-size");   textFontSize = parseFloat(thisEle , 10); 

 

3, rounded to integer/Random Number

           Math.ceil(4.8992303)     Math.floor(4.8992303)    Math.round(4.8992303)    Math.ceil(4.29993354)    Math.floor(4.29993354)   Math.round(4.29993354)    Math.round(Math.random()*100); 

 

4. truncate a string

  txt=$("p").text().substr(0,15);

 

5. String replacement

  $("image").attr("src").replace("size=60", "size=200"   $("#txt").replace(/[^\d-]/g, "").replace(/^\-/g, ""); 

 

6. Split the string

Str = arr = str = "Baidu, Farmer it station, Google, bamboo style, nongfuit.com, webpage chat group, 180550045 welcome to" arr = str. split (','); (I = 0; I <arr. length; I ++}

 

7. Mutual conversion between js and jquery objects

  aa = $("#mm").get(0);   bb = $(aa);  

 

8. Use Regular Expression matching

MatchTel =/^ ([0 \ +] \ d {2, 3 }-)? (0 \ d {2, 3})-) (\ d {7, 8}) (-(\ d {3 ,}))? $ /(! MatchTel. test ($ ("# txtTel" alert ("Incorrect phone format! "! 1}