[nscharacterset
alphanumericcharacterset
];
//所有數字和字母(大小寫)
[nscharactersetdecimaldigitcharacterset
];
//0-9的數字
[nscharactersetlettercharacterset
];
//所有字母
[nscharactersetlowercaselettercharacterset
];
//小寫字母
[nscharactersetuppercaselettercharacterset
];
//大寫字母
[nscharactersetpunctuationcharacterset
];
//標點符號
[nscharactersetwhitespaceandnewlinecharacterset
];
//空格和換行符
[nscharactersetwhitespacecharacterset
];
//空格
nsstring *examplestr = @" my name is johnny!";
examplestr = [examplestr stringbytrimmingcharactersinset:[nscharacterset whitespacecharacterset]];
nsarray *examplearr = [examplestr componentsseparatedbycharactersinset:[nscharacterset whitespacecharacterset]];
nspredicate *predicate = [nspredicate predicatewithformat:@"self <> ''"];
examplearr = [examplearr filteredarrayusingpredicate:predicate];
examplestr = [examplearr componentsjoinedbystring:@" "];
nsmutablecharacterset
*set
1= [nsmutablecharacterset
charactersetwithcharactersinstring
:@"hell"
];
nsmutablecharacterset
*set
2= [nsmutablecharacterset
charactersetwithcharactersinstring
:@"ello"
]; //去掉某些字元
[set2
removecharactersinstring
:@"e"
]; //--->l, o
//加上某些字元
[set2
addcharactersinstring
:@"e"
];
//--->e, l, o
//set相加
[set2
formunionwithcharacterset
:set
1];
//--->h,e,l,o
//set交集
[set2
formintersectionwithcharacterset
:set
1];
//--->e,l
//set取反
[set2
invert
];
字串處理 字串反轉
請原諒博主今天很閒，於是乎博主又開始更新微博了。這次要更新的問題是 編寫乙個函式，反轉乙個單詞的順序。例如 do or do not,there is no try.就要反轉成 try.no is there not,do or do 大家要認真看看這道題，這道題和大家想象的貌似有點不同。首先字串反...
字串處理
uncode與ansi字串轉換 我們使用windows函式multibytetowidechar將多位元組字串轉換成寬字元字串。函式如下 int multibytetowidechar uintcodepage dworddwflags lpcstrlpmultibytestr intcbmulti...
字串處理
byte array new byte 2 array system.text.encoding.default.getbytes 啊 int i1 short array 0 0 int i2 short array 1 0 unicode解碼方式下的漢字碼 array system.text.e...