○javascript 配列と並び替え
■添え字が数字の配列
<html> <script language="javascript" type="text/javascript"> var ar=new Array(4); ar[0]="zero"; ar[1]="one"; for(var i=0;i<ar.length;i++){ document.write("index: " + i + " val: " + ar[i] +"<br>"); } document.write("<br>"); for(var i in ar){ document.write("index: " + i + " val: " + ar[i] +"<br>"); } </script> <html>
■連想配列
<html> <script language="javascript" type="text/javascript"> var ar = new Array(); ar["aaa"]="a"; ar["ccc"]="c"; ar["bbb"]="b"; document.write(ar["aaa"] + "<br>"); document.write(ar["bbb"] + "<br>"); document.write(ar["ccc"] + "<br>"); </script> <html>
■要素を追加して並び替え
<html> <script language="javascript" type="text/javascript"> var ar = new Array(); ar.push("b"); ar.push("c"); ar.push("a"); ar.sort(); for(var i in ar){ document.write("index: " + i + " val: " + ar[i] + "<br>"); } </script> <html>
■複数の値の要素を並び替え
<html> <script language="javascript" type="text/javascript"> var ar = new Array(); ar.push(["bbb","b"]); ar.push(["ccc","c"]); ar.push(["aaa","a"]); ar.sort(sort_desc); for(var i in ar){ document.write("index: " + i + " val1: " + ar[i][0] + " val2: "+ar[i][1] +"<br>"); } function sort_desc(a,b){ return a[0] > b[0] ? 1 : -1; } //小文字にして並び替え //function sort_desc_c(a,b){ // return a[0].toLowerCase() > b[0].toLowerCase() ? 1 : -1; //} </script> <html>
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