The Objective-C Language
This chapter describes the Objective-C language and discusses the principles of object-oriented programming as they're implemented in Objective-C. It covers all the basic features that the language adds to standard C. The next chapter continues the discussion by taking up more advanced and less commonly used language features.
Objective-C syntax is a superset of standard C syntax, and its compiler works for both C and Objective-C source code. The compiler recognizes Objective-C source files by a ``.m'' extension, just as it recognizes files containing only standard C syntax by a ``.c'' extension. The Objective-C language is fully compatible with ANSI standard C.
Objective-C can also be used as an extension to C++. At first glance, this may seem superfluous since C++ is itself an object-oriented extension of C. But C++ was designed primarily as ``a better C,'' and not necessarily as a full-featured object-oriented language. It lacks some of the possibilities for object-oriented design that dynamic typing and dynamic binding bring to Objective-C. At the same time, it has useful language features not found in Objective-C. When you use the two languages in combination, you can assign appropriate roles to the features found in each and take advantage of what's best in both.
Because object-oriented programs postpone many decisions from compile time to run time, object-oriented languages depend on a run-time system for executing the compiled code. The run-time system for the Objective-C language is discussed in Chapter 4. This chapter and the next present the language, but touch on important elements of the run-time system as they're important for understanding language features. NeXT has modified the GNU C compiler to also compile Objective-C and provides its own run-time system.
Tuesday, September 16, 2008
Sunday, June 1, 2008
GRE MATERIAL
Graduate Record Examination - GRE
Download Link of Free GRE Material, eBooks, Mock Tests, Softwares
Note: The below mentioned links are external links only and no file is being uploaded on blogger’s server. If any of these links violates copyright, please inform us, we will remove that link(s) immediately.
Cracking the GRE Biology Test
Math Review for Practicing to take the GRE
GRE Preparations - Practice Structures (9 mock sample)
Ultimate GRE Tool Kit, 1st edition
Dictionary_for_GRE.rar
Direction for Computer based GRE.doc
GRE
Cambridge_Gre
GRE-Questions-with-answers
800test.coms_5_Verbal_tests
GRE-Practice-test
GRE-10-sample-tests
GRE-Vocabulary
GRE MATH
PowerPrepGRE
GRE VERY GOOD MATERIAL
GRE PETERSON
Top-100-words-for-GRE-And-TOEFL
GRE-Word-Power-Made-Easy
Practice-Tests
Download Link of Free GRE Material, eBooks, Mock Tests, Softwares
Note: The below mentioned links are external links only and no file is being uploaded on blogger’s server. If any of these links violates copyright, please inform us, we will remove that link(s) immediately.
Cracking the GRE Biology Test
Math Review for Practicing to take the GRE
GRE Preparations - Practice Structures (9 mock sample)
Ultimate GRE Tool Kit, 1st edition
Dictionary_for_GRE.rar
Direction for Computer based GRE.doc
GRE
Cambridge_Gre
GRE-Questions-with-answers
800test.coms_5_Verbal_tests
GRE-Practice-test
GRE-10-sample-tests
GRE-Vocabulary
GRE MATH
PowerPrepGRE
GRE VERY GOOD MATERIAL
GRE PETERSON
Top-100-words-for-GRE-And-TOEFL
GRE-Word-Power-Made-Easy
Practice-Tests
Friday, May 30, 2008
GRE QUANT UPTO DATE
1. If 0 > x > -1 then which of the following must be the greatest among all the given options
A. x
B. 2x
C. x^3
D. x-1
E. x^3-1
2. If x < y and x^2-xy=0
Col a: x
Col b: 0
3. Col A: 1/97+1/98+1/99+1/100
Col B: 1/25
4. In one bag, half the balls are red, 1/8 green, 24 are neither, so how many balls are there altogether?
5. Col a: (4^-3+4^9)/32^-2
Col b:16(1+2^23)
6. If a man walks at the rate of 3miles per hour then the distance he covered in 18 minutes is given by (1mile = 5208foot)
A. 4000 feet
B. 4250 feet
C. 4500 feet
D. 4750 feet
E. 5000 feet
7. Given a smaller circle inscribed in the larger circle, if.... 'r' is a point on the smaller circle, 's' is a point on the larger circle, 'o' is the center of both the circles, or = x, rs = y, and if the area of the smaller circle is equal to the area of the big circle minus the area of the small circle, then what is value of y in terms of x?
8. 1/500 - 1/1000 =
9. If x is a positive number, then
Col A: x^2
Col B: 1/x^2
10. mod(2- 1/2) + mod(2- 7/2) = ?
11. A man invested Rs.10,000 at the rate of interest x% and Rs.8000 at the rate of interest y%. If x = (3/4)*y then
col A: Interest for 1 year for 10000 at x%
col B: Interest for 1 year for 8000 at y%
QUANT DATABASE (Till May 26th)
Quants:
1. For 'n' any positive integer, if An = n^2
Col A: A1+A2+A3+A4+A5
Col B: 30
2. If a principle amount of Rs.10,000/- were given at the rate of interest x% and Rs.8000/- were given at the rate of y% and if x=3y/4 then
Col A: interest on money given at the rate x percent
Col B: interest on money given at the rate y percent
3. How many maximum non-overlaping divisions can be made in a rectangular by drawing 3 straight line.
4. Given a right angle triangle ABC, the length of hypoteneous AB is 15 and a point D was given on AB and DB is 5 and other point E was given on AC. Angle c and e are both 90 degree. Find the length of AE?
5. A company charges 4$ per order as transportation fees and 0.5$ per book. If an order costs x$ and it is equal to m times the transportation fees. What is the charge per book in terms of x and m?
QUANT DATABASE (Till May 23rd)
1. If a2 = a1 + 4* a1 and a1 = 3 find the 19th term of series?
2. If x = (1000) ^10
Col A: number of zeroes in 'x'
Col B: 30
3. If 621<x<675 and “x” is a multiple of 3, and if “u” is unit digit of “x” and “t” is tens digit of “x” then which of the following should be a multiple of “x”.
A. t+u
B. u-t
C. t^u
D. u^t
4.
Col A: X
Col B: Y
5. There are 26 women in a room in that 13 women are selected out of which 7 are under 40 years.
Col A: Percentage of women under 40
Col B: 40%
QUANT DATABASE (Till May 20th)
Quants:
1. If the sum of the first 100 positive integers is 5050 then what is the sum of the first 200 positive integers?
A. 10,100
B. 10,200
C. 15,050
D. 20,050
E. 20,100
2. Col A: sqrt(11)
Col B: 3.5
3. If the product of 6 integers is negative, at most how many of the integers can be negative?
4. If the slope of the line passing through the point (5,5) is 5/6. All of the following points could be on the line except.....
(some points were given in the options).
Question is similar to this.....
5. If 3x + y = 19 and x + 3y = 1 are the equation given. Find the value of 2x + 2y?
6. John wrote a phone number on a note that was later lost. John can remember that the number had 7 digits, the digit "1" appeared in the last three places and "0" did not appear at all. What is the probability that the phone number contains at least two prime digits?
a) 15/16
b) 11/16
c) 11/12
d) 1/2
e) 5/8
7. A group of 4 pumps are filling a tank. Each of the 3 smaller pumps works at 2/3rds the rate of the largest pump. If all 4 pumps work at the same time, they should fill the tank in what fraction of the time.... that it would have taken the largest pump if it operated alone?
8. If p+6, q+6, r+6 has a standard Deviation 'S' then what will be the Standard Deviation for p, q, r?
a.6S+6
b.8S+18
c.6S
d. none
9. If the profit made by a company is given by P and the tax the company has to pay to the government is $6000 + r% of the profit over $250000. If a company has to pay 3% of its profit as tax, what is the profit made by the company?
10. Given a1, a2, a3,......an, is a series such that an= an - a(n-1), for 2>n. If a1=-5, a2= 4, find the sum of first 50 numbers of the series?
11. Given two circles of radius 3 and 5, if a line tangent to the smaller circle passes through the bigger circle at points Q and P. What is the length of PQ?
A. x
B. 2x
C. x^3
D. x-1
E. x^3-1
2. If x < y and x^2-xy=0
Col a: x
Col b: 0
3. Col A: 1/97+1/98+1/99+1/100
Col B: 1/25
4. In one bag, half the balls are red, 1/8 green, 24 are neither, so how many balls are there altogether?
5. Col a: (4^-3+4^9)/32^-2
Col b:16(1+2^23)
6. If a man walks at the rate of 3miles per hour then the distance he covered in 18 minutes is given by (1mile = 5208foot)
A. 4000 feet
B. 4250 feet
C. 4500 feet
D. 4750 feet
E. 5000 feet
7. Given a smaller circle inscribed in the larger circle, if.... 'r' is a point on the smaller circle, 's' is a point on the larger circle, 'o' is the center of both the circles, or = x, rs = y, and if the area of the smaller circle is equal to the area of the big circle minus the area of the small circle, then what is value of y in terms of x?
8. 1/500 - 1/1000 =
9. If x is a positive number, then
Col A: x^2
Col B: 1/x^2
10. mod(2- 1/2) + mod(2- 7/2) = ?
11. A man invested Rs.10,000 at the rate of interest x% and Rs.8000 at the rate of interest y%. If x = (3/4)*y then
col A: Interest for 1 year for 10000 at x%
col B: Interest for 1 year for 8000 at y%
QUANT DATABASE (Till May 26th)
Quants:
1. For 'n' any positive integer, if An = n^2
Col A: A1+A2+A3+A4+A5
Col B: 30
2. If a principle amount of Rs.10,000/- were given at the rate of interest x% and Rs.8000/- were given at the rate of y% and if x=3y/4 then
Col A: interest on money given at the rate x percent
Col B: interest on money given at the rate y percent
3. How many maximum non-overlaping divisions can be made in a rectangular by drawing 3 straight line.
4. Given a right angle triangle ABC, the length of hypoteneous AB is 15 and a point D was given on AB and DB is 5 and other point E was given on AC. Angle c and e are both 90 degree. Find the length of AE?
5. A company charges 4$ per order as transportation fees and 0.5$ per book. If an order costs x$ and it is equal to m times the transportation fees. What is the charge per book in terms of x and m?
QUANT DATABASE (Till May 23rd)
1. If a2 = a1 + 4* a1 and a1 = 3 find the 19th term of series?
2. If x = (1000) ^10
Col A: number of zeroes in 'x'
Col B: 30
3. If 621<x<675 and “x” is a multiple of 3, and if “u” is unit digit of “x” and “t” is tens digit of “x” then which of the following should be a multiple of “x”.
A. t+u
B. u-t
C. t^u
D. u^t
4.
Col A: X
Col B: Y
5. There are 26 women in a room in that 13 women are selected out of which 7 are under 40 years.
Col A: Percentage of women under 40
Col B: 40%
QUANT DATABASE (Till May 20th)
Quants:
1. If the sum of the first 100 positive integers is 5050 then what is the sum of the first 200 positive integers?
A. 10,100
B. 10,200
C. 15,050
D. 20,050
E. 20,100
2. Col A: sqrt(11)
Col B: 3.5
3. If the product of 6 integers is negative, at most how many of the integers can be negative?
4. If the slope of the line passing through the point (5,5) is 5/6. All of the following points could be on the line except.....
(some points were given in the options).
Question is similar to this.....
5. If 3x + y = 19 and x + 3y = 1 are the equation given. Find the value of 2x + 2y?
6. John wrote a phone number on a note that was later lost. John can remember that the number had 7 digits, the digit "1" appeared in the last three places and "0" did not appear at all. What is the probability that the phone number contains at least two prime digits?
a) 15/16
b) 11/16
c) 11/12
d) 1/2
e) 5/8
7. A group of 4 pumps are filling a tank. Each of the 3 smaller pumps works at 2/3rds the rate of the largest pump. If all 4 pumps work at the same time, they should fill the tank in what fraction of the time.... that it would have taken the largest pump if it operated alone?
8. If p+6, q+6, r+6 has a standard Deviation 'S' then what will be the Standard Deviation for p, q, r?
a.6S+6
b.8S+18
c.6S
d. none
9. If the profit made by a company is given by P and the tax the company has to pay to the government is $6000 + r% of the profit over $250000. If a company has to pay 3% of its profit as tax, what is the profit made by the company?
10. Given a1, a2, a3,......an, is a series such that an= an - a(n-1), for 2>n. If a1=-5, a2= 4, find the sum of first 50 numbers of the series?
11. Given two circles of radius 3 and 5, if a line tangent to the smaller circle passes through the bigger circle at points Q and P. What is the length of PQ?
TODAYS WORDS
Today’s Words:
1. Prolific(adj): Producing offspring or fruit in great abundance; fertile; characterized by abundant production.
Synonyms: teeming, fecund, abundant.
Antonyms: barren.
2. Consonant(adj): in agreement; agreeable; in accord; consistent ; corresponding in sound, as words
Synonyms: concordant, congruous, conformant, accordant, compatible, congenial, harmonious.
Antonyms: dissonant
3. Boast(v): to speak with exaggeration and excessive pride, esp. about oneself; to glorify oneself in speech; talk in a self-admiring way
Boast(n): The act or an instance of bragging.
Synonyms(n): brag, braggadocio, fanfaronade, gasconade, rodomontade, vaunt
Synonyms(v): brag, crow, gasconade, rodomontade, vaunt
4. Accolade(n): any award, honor, an expression of approval; praise; a ceremonial embrace, as of greeting or salutation.
Synonyms: award, guerdon, honorarium, plum, premium.
5. Prig(n): A person who demonstrates an exaggerated conformity or propriety, especially in an irritatingly arrogant or smug manner.
Priggish(adj): exaggeratedly proper
Synonyms: Victorian, bluenosed, old-maidish, precise, prim, prudish, puritanical, strait-laced, stuffy, genteel
6. Straddling(n): to stand or sit with a leg on each side of; to stand wide apart, as the legs; the taking of a noncommittal position
7. Belie(v): to show to be false; contradict; to misrepresent.
Synonyms: refute, disprove, controvert, repudiate, confute, gainsay, besiege, betray, camouflage, contradict, counterfeit, deceive, defame, deny, disguise, disprove, distort, slander.
Antonyms: prove, verify, support.
8. Dissipated(adj): indulging in or characterized by excessive devotion to pleasure; intemperate; Wasted or squandered.
Synonyms: dissolute, incontinent, licentious, profligate, unbridled, unconstrained, unrestrained, wanton.
9. Nuance(n): a subtle difference or distinction in expression, meaning, response; a very slight difference or variation in color or tone
Synonyms: subtlety, nicety, hint, refinement, variation.
10. Pernicious(adj): causing insidious harm or ruin; injurious; hurtful
Synonyms: baleful, baneful, deleterious, detrimental, evil, fatal, malign, noxious, ruinous, toxic, lethal.
11. Gossamer(n): something extremely light, flimsy, or delicate; a fine, a fine film of cobwebs often seen floating in the air or caught on bushes or grass; a soft sheer gauzy fabric.
12. Elusive(adj): eluding clear perception or complete mental grasp; hard to express or define; difficult to describe.
Synonyms: baffling, cagey, cunning, eely, ephemeral, equivocal, evasive, fleeting, foxy, impalpable, insidious, intangible, lubricious, mysterious, saponaceous, slippery, subtle, tricky, wily.
13. Impede(v): to retard in movement or progress by means of obstacles or hindrances; to prevent or delay the start or progress of.
Synonyms: clog, curb, deter, disrupt, hamper, harass, hinder, interfere, obstruct, stymie, thwart.
14. Encumbrance(n): something that encumbers; something burdensome, useless, or superfluous; burden; hindrance; a dependent person; a charge against property; any obstruction that impedes or is burdensome.
Synonyms: complication, debt, embarrassment, handicap, hindrance, impediment, incubus, obstacle, perplexity.
15. Quarantine(n): a strict isolation imposed to prevent the spread of disease; to exclude, detain, or isolate for political, social, or hygienic reasons.
Synonyms: ban, confine, exclude, interdict, isolate, restrain, restrict.
Analogies:
1. Impede: Encumbrance
2.Quarantine: Isolate
1. Prolific(adj): Producing offspring or fruit in great abundance; fertile; characterized by abundant production.
Synonyms: teeming, fecund, abundant.
Antonyms: barren.
2. Consonant(adj): in agreement; agreeable; in accord; consistent ; corresponding in sound, as words
Synonyms: concordant, congruous, conformant, accordant, compatible, congenial, harmonious.
Antonyms: dissonant
3. Boast(v): to speak with exaggeration and excessive pride, esp. about oneself; to glorify oneself in speech; talk in a self-admiring way
Boast(n): The act or an instance of bragging.
Synonyms(n): brag, braggadocio, fanfaronade, gasconade, rodomontade, vaunt
Synonyms(v): brag, crow, gasconade, rodomontade, vaunt
4. Accolade(n): any award, honor, an expression of approval; praise; a ceremonial embrace, as of greeting or salutation.
Synonyms: award, guerdon, honorarium, plum, premium.
5. Prig(n): A person who demonstrates an exaggerated conformity or propriety, especially in an irritatingly arrogant or smug manner.
Priggish(adj): exaggeratedly proper
Synonyms: Victorian, bluenosed, old-maidish, precise, prim, prudish, puritanical, strait-laced, stuffy, genteel
6. Straddling(n): to stand or sit with a leg on each side of; to stand wide apart, as the legs; the taking of a noncommittal position
7. Belie(v): to show to be false; contradict; to misrepresent.
Synonyms: refute, disprove, controvert, repudiate, confute, gainsay, besiege, betray, camouflage, contradict, counterfeit, deceive, defame, deny, disguise, disprove, distort, slander.
Antonyms: prove, verify, support.
8. Dissipated(adj): indulging in or characterized by excessive devotion to pleasure; intemperate; Wasted or squandered.
Synonyms: dissolute, incontinent, licentious, profligate, unbridled, unconstrained, unrestrained, wanton.
9. Nuance(n): a subtle difference or distinction in expression, meaning, response; a very slight difference or variation in color or tone
Synonyms: subtlety, nicety, hint, refinement, variation.
10. Pernicious(adj): causing insidious harm or ruin; injurious; hurtful
Synonyms: baleful, baneful, deleterious, detrimental, evil, fatal, malign, noxious, ruinous, toxic, lethal.
11. Gossamer(n): something extremely light, flimsy, or delicate; a fine, a fine film of cobwebs often seen floating in the air or caught on bushes or grass; a soft sheer gauzy fabric.
12. Elusive(adj): eluding clear perception or complete mental grasp; hard to express or define; difficult to describe.
Synonyms: baffling, cagey, cunning, eely, ephemeral, equivocal, evasive, fleeting, foxy, impalpable, insidious, intangible, lubricious, mysterious, saponaceous, slippery, subtle, tricky, wily.
13. Impede(v): to retard in movement or progress by means of obstacles or hindrances; to prevent or delay the start or progress of.
Synonyms: clog, curb, deter, disrupt, hamper, harass, hinder, interfere, obstruct, stymie, thwart.
14. Encumbrance(n): something that encumbers; something burdensome, useless, or superfluous; burden; hindrance; a dependent person; a charge against property; any obstruction that impedes or is burdensome.
Synonyms: complication, debt, embarrassment, handicap, hindrance, impediment, incubus, obstacle, perplexity.
15. Quarantine(n): a strict isolation imposed to prevent the spread of disease; to exclude, detain, or isolate for political, social, or hygienic reasons.
Synonyms: ban, confine, exclude, interdict, isolate, restrain, restrict.
Analogies:
1. Impede: Encumbrance
2.Quarantine: Isolate
Thursday, May 29, 2008
GRE ONLINE PREPARATION
gre preparation
GRE Preparation Guides
Long time no see guys. Busy as bee I have been, unable to post or reply to your comments. Well its my birthday today (28th Feb) and I decided what better time than this to post on my favourite blog.
Well coming straight to the point, from most of the comments you have made, it appears that the GRE big book is the single most popular book you need! Well, I did post a direct link to it but it was so overused that the bandwidth limit of the googlepages site got exceeded and everyone could not download it.
Anyways, below are rapidshare links to the big book and some other GRE preparation stuff that will help you. By the way, if you're a new visitor, don't forget to check the blog's archive in the sidebar. Maybe I have already posted links to something you need in the blog.
The GRE Big Book
http://rapidshare.com/files/25410505/bigbook.zip
(Please paste the links in your browser and click enter. For some reasons I cannot link directly to rapidshare stuff. This goes for all the stuff emntioned below)
Vocaboly Software
http://rapidshare.com/files/25413579/Vocaboly.rar
5 Quants GRE tests
http://rapidshare.com/files/73539115/5_Quants_GRE_tests.zip
800score.com 28 maths tests
http://rapidshare.com/files/73540181/800score.com_28MATHS_29.zip
CAT simulator useful for GRE
http://rapidshare.com/files/73540589/CAT_27s_Simulator_GRE.zip
Nova Prep Guide
http://rapidshare.com/files/44846489/Nova.pdf
GRE Preparation Guides
Long time no see guys. Busy as bee I have been, unable to post or reply to your comments. Well its my birthday today (28th Feb) and I decided what better time than this to post on my favourite blog.
Well coming straight to the point, from most of the comments you have made, it appears that the GRE big book is the single most popular book you need! Well, I did post a direct link to it but it was so overused that the bandwidth limit of the googlepages site got exceeded and everyone could not download it.
Anyways, below are rapidshare links to the big book and some other GRE preparation stuff that will help you. By the way, if you're a new visitor, don't forget to check the blog's archive in the sidebar. Maybe I have already posted links to something you need in the blog.
The GRE Big Book
http://rapidshare.com/files/25410505/bigbook.zip
(Please paste the links in your browser and click enter. For some reasons I cannot link directly to rapidshare stuff. This goes for all the stuff emntioned below)
Vocaboly Software
http://rapidshare.com/files/25413579/Vocaboly.rar
5 Quants GRE tests
http://rapidshare.com/files/73539115/5_Quants_GRE_tests.zip
800score.com 28 maths tests
http://rapidshare.com/files/73540181/800score.com_28MATHS_29.zip
CAT simulator useful for GRE
http://rapidshare.com/files/73540589/CAT_27s_Simulator_GRE.zip
Nova Prep Guide
http://rapidshare.com/files/44846489/Nova.pdf
Online preparation
be online
by posting me about your exam we will try to supply different meterials.
dont waste your time start posting.
by posting me about your exam we will try to supply different meterials.
dont waste your time start posting.
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