Index[SYMBOL] [A] [B] [C] [D] [E] [F] [G] [H] [I] [J] [K] [L] [M] [N] [O] [P] [Q] [R] [S] [T] [U] [V] [W] [X] [Y] [Z] identifier matching if vs. while vs. foreach IgnoreCase (.NET) 2nd 3rd 4th 5th IgnorePatternWhitespace (.NET) 2nd 3rd 4th IllegalArgumentException 2nd IllegalStateException image tags example image tags Java example implementation of engine implicit implicit anchor optimization Imports 2nd 3rd \p{InArrows} 2nd 3rd \p{InBasic_Latin} 2nd 3rd \p{InBox_Drawing} 2nd 3rd \p{InCurrency} 2nd 3rd \p{InCyrillic} 2nd 3rd Index Group object method Match object method IndexOutOfBoundsException \p{InDingbats} 2nd 3rd indispensable TiVo \p{InHangul_Jamo} 2nd 3rd \p{InHebrew} 2nd 3rd \p{Inherited} 2nd 3rd initial class discrimination 2nd 3rd 4th 5th \p{Initial_Punctuation} 2nd 3rd \p{InKatakana} 2nd 3rd \p{InTamil} 2nd 3rd integrated handling interpolation caching introduced mimicking PHP INTERSECTION class set operations interval X {0,0} introduced \p{InTibetan} 2nd 3rd introduced encoding introduction Perl IOException IP example 2nd 3rd 4th 5th 6th Iraq Is vs. In 2nd .NET Java Perl \p{IsCherokee} 2nd 3rd \p{IsCommon} 2nd 3rd \p{IsCyrillic} 2nd 3rd \p{IsGujarati} 2nd 3rd \p{IsHan} 2nd 3rd \p{IsHebrew} 2nd 3rd \p{IsHiragana} 2nd 3rd isJavaIdentifierStart \p{IsKatakana} 2nd 3rd \p{IsLatin} 2nd 3rd IsMatch (Regex object method) ISO-8859-1 encoding 2nd 3rd 4th 5th issues overview encoding \p{IsThai} 2nd 3rd \p{IsTibetan} 2nd 3rd |