Weapon target assignment problem - Revision history

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			In [[formal language theory]], an '''LL grammar''' is a [[formal grammar]] that can be [[parsing\|parsed]] by an [[LL parser]], which parses the input from '''L'''eft to right, and constructs a [[Context-free grammar#Derivations and syntax trees\|'''L'''eftmost derivation]] of the sentence (hence LL, compared with [[LR parser]] that constructs a rightmost derivation). A language that has an LL grammar is known as an '''LL language'''. These form subsets of [[deterministic context-free grammar]]s (DCFGs) and [[deterministic context-free language]]s (DCFLs), respectively. One says that a given grammar or language "is an LL grammar/language" or simply "is LL" to indicate that it is in this class.

			There is a separate LL(''k'') parser for each natural number ''k'' (0, 1, 2, ...) – an LL parser is called an LL(''k'') parser if it uses ''k'' [[token (parser)\|tokens]] of [[Parsing#Lookahead\|lookahead]] when parsing a sentence – and there are accordingly the subsets of LL(''k'') grammars for each ''k'' (LL(0) grammars, LL(1) grammars, etc.) and corresponding subsets of LL(''k'') languages. As allowing more tokens of lookahead makes the parser strictly more powerful – there are LL(''k'' + ''n'') languages that are not LL(''k'') languages<ref>http://portal.acm.org/citation.cfm?id=805431</ref> – these form ''strictly'' increasing sequence of sets, <math>LL(0) \subset LL(1) \subset LL(2) \subset \cdots</math>. Since these are all DCFLs, a corollary is that for any fixed ''k'', there are DCFLs that are not LL(''k''). An LL parser is called an LL() parser if it is not restricted to a finite ''k'' tokens of lookahead, but can make parsing decisions by recognizing whether the following tokens belong to a [[regular language]] (for example by use of a [[Deterministic Finite Automaton]]), and accordingly there are the set of LL() grammars and the set of LL(*) languages.

	~~You don't have to improve your house like a serious professional to fully enjoy it. No~~, ~~not at all! You can do simple little improvements. If you do not have a clue how to start with this endeavor~~, ~~then try taking a gander at the tips below. They can give you some helpful advice.<br><br>Make sure you keep the filter for your air conditioning unit clean. If it is backed up~~, ~~the AC unit will need~~ to work that much harder. This will also cost you money on the time it stays on. Change your filter on a regular basis; monthly is ideal.<br><br>Consider converting unused rooms in your house. Before you spend too much money adding an extra room or ~~two to your home~~, ~~seriously look at what you have~~ to ~~work with~~. ~~Are you getting much use out~~ of that ~~exercise room or office? Even storage spaces like attics~~ can be ~~transformed into something useful~~, ~~like~~ a ~~bedroom.<br><br>If you just purchased your home or are renovating it, you know that wallpaper borders~~ can be a ~~pesky item to remove. If you have the time and don~~'~~t want to invest a lot of money in removing it~~, ~~you can easily remove it with the following steps: 1. Get a small spray flask and fill it with water. 2. Grab a towel for~~ the ~~next step. Repeatedly spray the wallpaper border until it~~ is ~~thoroughly wet. The water activates the glue on the back~~ and ~~makes it slimy, which in turn makes it easier to remove. 3. Simply rub the towel over it in a circular fashion and it will start peeling off~~ the ~~wallpaper.<br><br>Instead of purchasing white towels for your bathroom, choose darker colors or patterns. White~~ is a color that picks up everything and needs constant bleaching. You can choose to have your fingertip towels and washcloths to be one color and your actual bath towels to be a different color altogether. It saves a lot of trouble when washing and makes your bathroom appear a lot cleaner and put together.<br><br>Don'~~t be frightened~~ of ~~large open spaces because you can easily divide them. Divide large spaces with a ceiling mounted shade~~ or ~~curtain that you are able to pull down~~. ~~It can cost effectively divide a large area and you can just pull your divider back up when you~~'~~re having~~ a ~~large gathering or party.<br><br>You should always wear safety glasses or goggles when cutting with~~ a ~~saw or other powered equipment. If you do~~ not ~~wear protective equipment for your eyes pieces~~ of ~~the material you~~ are ~~cutting or dust can become lodged in your eye or cause irritation. In severe cases permanent damage can~~ be ~~done to your eye.<br><br>If your kitchen is~~ in ~~need of a renovation that you can~~'~~t afford, consider simply repainting your cabinets and replacing their hinges. You won~~'~~t have made any major functional changes, but your kitchen will appear much nicer and newer~~. ~~Replacing hinges ensures that cabinet doors fit snugly instead of hanging open, and~~ the ~~new paint will brighten up~~ the ~~whole room.<br><br>Linoleum is a great alternative~~ to ~~tiling, as it is much more wallet friendly~~. ~~However, it can get scuffed quite easily~~ with ~~use. You can quickly get rid~~ of ~~[http://imgur.com/hot?q~~=~~linoleum+scuffing linoleum scuffing] by rubbing white toothpaste on it with a cloth. Another quick fix~~ is ~~spraying WD-40 on~~ the ~~affected spot~~ and ~~making sure to degrease the area when you~~'~~re finished, with soapy water~~.~~<br><br>If you~~ are ~~renovating a small room~~, ~~consider making use of built-in mirrors~~. ~~The reflection from a carefully-positioned mirror will make a small room seem considerably more spacious. A mirror near the window~~ can ~~add more natural light to a dim room. Avoid overusing mirrors or placing them opposite of each other, however,~~ as ~~this~~ can create strange lighting effects.<br><br>You need to do research and find out how much your materials will cost before you begin. Buying in bulk is a great way to save money in the long term. Some materials and equipment that may be needed have significant lead times. Your project could get held up if you have to wait for materials to arrive.<br><br>Create a showcase in your kitchen. By removing cabinet doors, you can display your favorite dishware. Group together by ~~color, similar items or shapes, for~~ a ~~look that will grab people's attention. If your~~ [~~http://Search.Huffingtonpost.com/search?q=dishware&s_it=header_form_v1 dishware~~] ~~is white or clear glass, be sure to paint the inside of the cabinet in~~ a ~~color that will show it off.<br><br>Brighten up your dining room with table linens. By using tablecloths~~ and ~~runners on your dining table, you can achieve a unique look that~~ can be ~~changed with every season~~. ~~As well as creating an attractive dining environment, they protect your table from scratches. Try to pick a material that~~ is ~~easily washable and stain resistant.<br><br>See, improving your home is more than just huge home improvement jobs. It really can be any kind~~ of ~~endeavor you want it to be. If you could only do large projects~~, ~~there wouldn't be home improvement stores open where you buy supplies~~. ~~You should feel ready~~ to ~~get started and use your new knowledge of the endeavor~~.~~<br><br>If you have any kind of questions pertaining to where and the best ways to utilize roofing (~~[~~http://www~~.~~4shared.com~~/~~office/_36GSqV-ba/Take_A_Look_At_These_Great_Roo~~.~~html www.4shared.com~~]~~), you could call us at our own website.~~		LL grammars, particularly LL(1) grammars, are of great practical interest, as they are easy to parse, either by LL parsers or by recursive descent parsers, and many [[computer language]]s are designed to be LL(1) for this reason. However, the limitations of LL parsers mean that languages that can be expressed by LL grammars are limited. Further, even if a language can be expressed by an LL grammar, or LL(''k'') for a given ''k,'' the grammar is generally longer and more complicated than an alternative grammar using more expressive rules so that the grammar is not LL(''k'') – either requiring more tokens of lookahead or not being LL at all. Being in LL(''k'') is a property of the grammar as a whole, not of individual production rules, but there are some production rules – notably those using [[left recursion]] – which cannot be presented in an LL(''k'') grammar.

			LL(1) grammars are very popular because the corresponding LL parsers only need to look at the next token to make their parsing decisions. Languages based on grammars with a high value of ''k'' have traditionally been considered {{Citation needed\|date=August 2009}} to be difficult to parse, although this is less true now given the availability and widespread use {{Citation needed\|date=August 2009}} of parser generators supporting LL(''k'') grammars for arbitrary ''k''.

			LL parsers are table-based parsers, similar to LR parsers. LL grammars can alternatively be characterized as precisely those that can be parsed by a [[predictive parser]] – a [[recursive descent parser]] without [[backtracking]] – and these can be readily written by hand. This article is about the formal properties of LL grammars; for parsing, see [[LL parser]] or [[recursive descent parser]].

			==Relation to other classes==
			{{section stub\|date=September 2013}}
			See {{Harvtxt\|Beatty\|1982}}.

			===LR===
			{{empty section\|date=September 2013}}
			===LALR===
			{{empty section\|date=September 2013}}
			===SLR===
			{{see\|SLR grammar}}
			{{empty section\|date=September 2013}}

			==See also==
			* [[LR grammar]]

			==References==
			{{reflist}}
			{{refbegin}}
			* {{cite doi\|10.1145/322344.322350}}
			{{refend}}

			[[Category:Formal languages]]

			{{computer science stub}}

216.17.134.225 at 18:12, 4 January 2012

2012-01-04T18:12:49Z

New page

You don't have to improve your house like a serious professional to fully enjoy it. No, not at all! You can do simple little improvements. If you do not have a clue how to start with this endeavor, then try taking a gander at the tips below. They can give you some helpful advice. Make sure you keep the filter for your air conditioning unit clean. If it is backed up, the AC unit will need to work that much harder. This will also cost you money on the time it stays on. Change your filter on a regular basis; monthly is ideal. Consider converting unused rooms in your house. Before you spend too much money adding an extra room or two to your home, seriously look at what you have to work with. Are you getting much use out of that exercise room or office? Even storage spaces like attics can be transformed into something useful, like a bedroom. If you just purchased your home or are renovating it, you know that wallpaper borders can be a pesky item to remove. If you have the time and don't want to invest a lot of money in removing it, you can easily remove it with the following steps: 1. Get a small spray flask and fill it with water. 2. Grab a towel for the next step. Repeatedly spray the wallpaper border until it is thoroughly wet. The water activates the glue on the back and makes it slimy, which in turn makes it easier to remove. 3. Simply rub the towel over it in a circular fashion and it will start peeling off the wallpaper. Instead of purchasing white towels for your bathroom, choose darker colors or patterns. White is a color that picks up everything and needs constant bleaching. You can choose to have your fingertip towels and washcloths to be one color and your actual bath towels to be a different color altogether. It saves a lot of trouble when washing and makes your bathroom appear a lot cleaner and put together. Don't be frightened of large open spaces because you can easily divide them. Divide large spaces with a ceiling mounted shade or curtain that you are able to pull down. It can cost effectively divide a large area and you can just pull your divider back up when you're having a large gathering or party. You should always wear safety glasses or goggles when cutting with a saw or other powered equipment. If you do not wear protective equipment for your eyes pieces of the material you are cutting or dust can become lodged in your eye or cause irritation. In severe cases permanent damage can be done to your eye. If your kitchen is in need of a renovation that you can't afford, consider simply repainting your cabinets and replacing their hinges. You won't have made any major functional changes, but your kitchen will appear much nicer and newer. Replacing hinges ensures that cabinet doors fit snugly instead of hanging open, and the new paint will brighten up the whole room. Linoleum is a great alternative to tiling, as it is much more wallet friendly. However, it can get scuffed quite easily with use. You can quickly get rid of [http://imgur.com/hot?q=linoleum+scuffing linoleum scuffing] by rubbing white toothpaste on it with a cloth. Another quick fix is spraying WD-40 on the affected spot and making sure to degrease the area when you're finished, with soapy water. If you are renovating a small room, consider making use of built-in mirrors. The reflection from a carefully-positioned mirror will make a small room seem considerably more spacious. A mirror near the window can add more natural light to a dim room. Avoid overusing mirrors or placing them opposite of each other, however, as this can create strange lighting effects. You need to do research and find out how much your materials will cost before you begin. Buying in bulk is a great way to save money in the long term. Some materials and equipment that may be needed have significant lead times. Your project could get held up if you have to wait for materials to arrive. Create a showcase in your kitchen. By removing cabinet doors, you can display your favorite dishware. Group together by color, similar items or shapes, for a look that will grab people's attention. If your [http://Search.Huffingtonpost.com/search?q=dishware&s_it=header_form_v1 dishware] is white or clear glass, be sure to paint the inside of the cabinet in a color that will show it off. Brighten up your dining room with table linens. By using tablecloths and runners on your dining table, you can achieve a unique look that can be changed with every season. As well as creating an attractive dining environment, they protect your table from scratches. Try to pick a material that is easily washable and stain resistant. See, improving your home is more than just huge home improvement jobs. It really can be any kind of endeavor you want it to be. If you could only do large projects, there wouldn't be home improvement stores open where you buy supplies. You should feel ready to get started and use your new knowledge of the endeavor. If you have any kind of questions pertaining to where and the best ways to utilize roofing ([http://www.4shared.com/office/_36GSqV-ba/Take_A_Look_At_These_Great_Roo.html www.4shared.com]), you could call us at our own website.