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Isequaltostring:[contact name]]) {[Array removeobject:contact];Returnc = Contact;NewKey = key;}}}[[_contactlist Objectforkey:newkey] removeobject:c];}Delete all contacts under a group-(void) Removeallcontactsbygroupname: (NSString *) GroupName {[_contactlist Removeobjectforkey:groupname];}Show All Contacts-(void) Showallcontacts {Nsarray *allkeys = [_contactlist AllKeys];Nsarray *newarray = [AllKeys sortedarrayusingselector: @selector (compare:)];For (NSString *key in NewArray) {Nsmutablearray

Text and varchar character indexes are invalid when innodb in mysql is a uft8 character set. The index length of a single field is limited to 767 bytes due to the index length limit in the innodb utf8 character set. The maximum index length is: The InnoDB internal maximum key length is 3500 bytes, but MySQL itself restricts this to 3072 bytes. (1024 bytes for non-64-bit builds before MySQL 5.0.17, and for all builds before 5.0.15 .) In the utf8 character set, the [data part] of varchar (255) occ

body, \SC, \it formula default,\SF and other line bodies. Chinese commonly used: \songti, \kaishu, \heiti, \fangsong, \biaosong,.5. Question: How does LaTeX generate a directory?Answer: 1. It is best to define the table of contents form, beautiful and convenient, the following is a definition of a few, you might as well try(1) \def\mla#1#2#3{\par\noindent\hspace*{1 true cm}\parbox[b]{12.3 true cm}{\protect

array directly. or var arr=["Paramecium", "Love", "fluffy"];//parentheses can also declare an array object Of course, like the C language, you can also define 2-D 3-dimensional arrays, which are not discussed here. Properties of array: length Arr.length returns the length of the array arr, which is common to the traversal of the arrays in the loop, such as: for (Var i=0;iExecutive part} Array element access: Arr[index], in which index represents the array cardinality, from 0, a total of a

Machine Learning catalogue:Https://archive.ics.uci.edu/ml/datasets/IrisReference: Bache, K. Lichman, M. (2013). UCI Machine Learning Repository. Irvine, ca:university of California, School of information and Computer science. The set of three kinds, 150 iris were measured. The three categories include:1. Mountain Iris (N=50)2. Color-changing Iris (N=50)3. Virginia Iris (N=50)Four features include:1. Sepals Length (cm)2. Sepals width (

": ""}, {"CPDH": "A02000111", "page": "2", "Ca": "", "MC": "Phosphate Ore", "ename": "Phosphorite Grit", "BM": ""}, {"CPDH": "A02000201", "page": "2", "Ca": "", "MC": "Phosphate ore powder", "ename": "Phosphate Rock powder", "BM": ""}, {"CPDH": "A03000101", "page": "2", "Ca": "12447-04-0", "MC": "Boron ore", "ename": "Ascharite; Boric ore "," BM ":" Boron magnesium ore "}, {"CPDH": "A04000101", "page": "2", "Ca": "", "MC": "Potash feldspar", "ename": "Potash feldspar;" Potassium feldspars ",

are they normal? Under what circumstances are they abnormal? Here are some reference indicators: 1. Fetal sac: the fetal sac is only seen in the early stages of pregnancy. Its size is about 1.5 in diameter at 2 cm months of pregnancy, and about 2.5 is normal at 5 cm months of pregnancy. The fetal sac is normal in the bottom, front wall, back wall, upper and middle of the uterus. The shape is circular, ell

": "phosphate ore", "ename ": "phosphorite grit", "BM ":""}, {"CPDH": "a02000201", "page": "2", "ca": "", "Mc": "phosphate rock powder", "ename ": "phosphate rock powder", "BM ":""}, {"CPDH": "a03000101", "page": "2", "ca": "12447-04-0", "Mc": "Boron Ore ", "ename": "ascharite; boric ore", "BM": "Boron and magnesium "}, {"CPDH": "a04000101", "page": "2", "ca": "", "Mc": "potash", "ename": "potash feldspar; potassium feldspars "," BM ":""}, {"CPDH": "a04000201", "page": "2", "ca": "12003-63-3", "

, JJ;Unsigned int I, W, N, xz, CM, tz, BZ; Void delay (unsigned int MS ){MS = Ms * 3;While (-- ms );} Void num_led (int aa, int bb){Int KK;For (KK = 0; KK Keys 11 = key1; keys 12 = key2;P2 = ~ Num1 [AA + KK * 2]; P1 = ~ Num1 [AA + 1 + KK * 2];Delay (20 );P1 = 0xff; P2 = 0xff; Keys 11 = key2; keys 12 = key1;P2 = ~ Num2 [BB + 15-kk * 2]; P1 = ~ Num2 [BB + 14-kk * 2];Delay (20 );P1 = 0xff; P2 = 0xff;}} Void display_clock (void){Key1 = key; key2 =! Key;Di

Baidu interview question objective answer [original], original interview question answer Recently, I have been looking for a job. I often send interviews with some big companies in the class group to test the questions. I received such a question yesterday, which is said to be Baidu's interview question. There is a 27 cm fine wood pole, each of which has an ant in the five positions 3 cm, 7