Czy można zrobić coś takiego:Czy istnieje sposób, aby sformatować ciąg w Flex
var s:String = format("%20d %-10s %s", time, type, message);
W językach takich jak C, C++, C#, Python i Perl jest coś podobnego do mojego przykładu, ale nie mogę tego znaleźć dla Flex.
Nie chcę tworzyć specjalnych formatów klas dla każdego ciągu, który chcę sformatować.
Znalazłem ten skrypt, który implementuje sprintf - i to jest dokładnie to, czego szukałem. Dzięki Manish Jethani!
/* sprintf(3) implementation in ActionScript 3.0.
*
* Author: Manish Jethani ([email protected])
* Date: April 3, 2006
* Version: 0.1
*
* Copyright (c) 2006 Manish Jethani
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*/
package
{
/* sprintf(3) implementation in ActionScript 3.0.
*
* http://www.die.net/doc/linux/man/man3/sprintf.3.html
*
* The following flags are supported: '#', '0', '-', '+'
*
* Field widths are fully supported. '*' is not supported.
*
* Precision is supported except one difference from the standard: for an
* explicit precision of 0 and a result string of "0", the output is "0"
* instead of an empty string.
*
* Length modifiers are not supported.
*
* The following conversion specifiers are supported: 'd', 'i', 'o', 'u', 'x',
* 'X', 'f', 'F', 'c', 's', '%'
*
* Report bugs to [email protected]
*/
public function sprintf(format:String, ... args):String
{
var result:String = "";
var length:int = format.length;
for (var i:int = 0; i < length; i++)
{
var c:String = format.charAt(i);
if (c == "%")
{
var pastFieldWidth:Boolean = false;
var pastFlags:Boolean = false;
var flagAlternateForm:Boolean = false;
var flagZeroPad:Boolean = false;
var flagLeftJustify:Boolean = false;
var flagSpace:Boolean = false;
var flagSign:Boolean = false;
var fieldWidth:String = "";
var precision:String = "";
c = format.charAt(++i);
while (c != "d"
&& c != "i"
&& c != "o"
&& c != "u"
&& c != "x"
&& c != "X"
&& c != "f"
&& c != "F"
&& c != "c"
&& c != "s"
&& c != "%")
{
if (!pastFlags)
{
if (!flagAlternateForm && c == "#")
flagAlternateForm = true;
else if (!flagZeroPad && c == "0")
flagZeroPad = true;
else if (!flagLeftJustify && c == "-")
flagLeftJustify = true;
else if (!flagSpace && c == " ")
flagSpace = true;
else if (!flagSign && c == "+")
flagSign = true;
else
pastFlags = true;
}
if (!pastFieldWidth && c == ".")
{
pastFlags = true;
pastFieldWidth = true;
c = format.charAt(++i);
continue;
}
if (pastFlags)
{
if (!pastFieldWidth)
fieldWidth += c;
else
precision += c;
}
c = format.charAt(++i);
}
switch (c)
{
case "d":
case "i":
var next:* = args.shift();
var str:String = String(Math.abs(int(next)));
if (precision != "")
str = leftPad(str, int(precision), "0");
if (int(next) < 0)
str = "-" + str;
else if (flagSign && int(next) >= 0)
str = "+" + str;
if (fieldWidth != "")
{
if (flagLeftJustify)
str = rightPad(str, int(fieldWidth));
else if (flagZeroPad && precision == "")
str = leftPad(str, int(fieldWidth), "0");
else
str = leftPad(str, int(fieldWidth));
}
result += str;
break;
case "o":
var next:* = args.shift();
var str:String = uint(next).toString(8);
if (flagAlternateForm && str != "0")
str = "0" + str;
if (precision != "")
str = leftPad(str, int(precision), "0");
if (fieldWidth != "")
{
if (flagLeftJustify)
str = rightPad(str, int(fieldWidth));
else if (flagZeroPad && precision == "")
str = leftPad(str, int(fieldWidth), "0");
else
str = leftPad(str, int(fieldWidth));
}
result += str;
break;
case "u":
var next:* = args.shift();
var str:String = uint(next).toString(10);
if (precision != "")
str = leftPad(str, int(precision), "0");
if (fieldWidth != "")
{
if (flagLeftJustify)
str = rightPad(str, int(fieldWidth));
else if (flagZeroPad && precision == "")
str = leftPad(str, int(fieldWidth), "0");
else
str = leftPad(str, int(fieldWidth));
}
result += str;
break;
case "X":
var capitalise:Boolean = true;
case "x":
var next:* = args.shift();
var str:String = uint(next).toString(16);
if (precision != "")
str = leftPad(str, int(precision), "0");
var prepend:Boolean = flagAlternateForm && uint(next) != 0;
if (fieldWidth != "" && !flagLeftJustify
&& flagZeroPad && precision == "")
str = leftPad(str, prepend
? int(fieldWidth) - 2 : int(fieldWidth), "0");
if (prepend)
str = "0x" + str;
if (fieldWidth != "")
{
if (flagLeftJustify)
str = rightPad(str, int(fieldWidth));
else
str = leftPad(str, int(fieldWidth));
}
if (capitalise)
str = str.toUpperCase();
result += str;
break;
case "f":
case "F":
var next:* = args.shift();
var str:String = Math.abs(Number(next)).toFixed(
precision != "" ? int(precision) : 6);
if (int(next) < 0)
str = "-" + str;
else if (flagSign && int(next) >= 0)
str = "+" + str;
if (flagAlternateForm && str.indexOf(".") == -1)
str += ".";
if (fieldWidth != "")
{
if (flagLeftJustify)
str = rightPad(str, int(fieldWidth));
else if (flagZeroPad && precision == "")
str = leftPad(str, int(fieldWidth), "0");
else
str = leftPad(str, int(fieldWidth));
}
result += str;
break;
case "c":
var next:* = args.shift();
var str:String = String.fromCharCode(int(next));
if (fieldWidth != "")
{
if (flagLeftJustify)
str = rightPad(str, int(fieldWidth));
else
str = leftPad(str, int(fieldWidth));
}
result += str;
break;
case "s":
var next:* = args.shift();
var str:String = String(next);
if (precision != "")
str = str.substring(0, int(precision));
if (fieldWidth != "")
{
if (flagLeftJustify)
str = rightPad(str, int(fieldWidth));
else
str = leftPad(str, int(fieldWidth));
}
result += str;
break;
case "%":
result += "%";
}
}
else
{
result += c;
}
}
return result;
}
}
// Private functions
function leftPad(source:String, targetLength:int, padChar:String = " "):String
{
if (source.length < targetLength)
{
var padding:String = "";
while (padding.length + source.length < targetLength)
padding += padChar;
return padding + source;
}
return source;
}
function rightPad(source:String, targetLength:int, padChar:String = " "):String
{
while (source.length < targetLength)
source += padChar;
return source;
}
Prawdopodobnie szukasz mx.utils.StringUtil.substitute(). Działa podobnie do .NET String.Format().
Dla przykładu:
StringUtil.substitute("Hello {0}", ["World"]);
Dziękujemy! Właśnie tego chcę. – zinovii
Niestety, nie wydaje się, że ma takie flagi formatowania jak "sprint", po prostu wypisuje równoważnik "String" podanych argumentów. –
Projekt printf-as3 brzmi jak powinien pasować do Twoich potrzeb
Nie, że kiedykolwiek widziałem, nie. –