otn meaning

"Statement" The content of this post is copy, the source is the stack overflow.It has several meanings in Scala and all related to its mathematical meaning as implication. In a value, it introduces a function literal, or lambda. e.g. the bit inside the curly braces inList(1,2,3).map { (x: Int) => x * 2 } In a type, with symbols on both sides of the arrow (e.g. a = t , (b) + t , (a,b,c) = + T , etc.) It's sugar for function, that's, A Funct

An error occurred while reading a regular expression on the webpage. Let's take a look at the error. It is best to explain the meaning of each symbol. I am learning an example of a regular expression on the webpage, and an error has occurred. Let's take a look at the error. It is best to explain the meaning of each symbol. the div tag is being extracted and the content with the ID of PostContent is stored i

The meaning of the DiscuzX-custom function lies in getgpc () in function_core.php. what is the meaning of this function? Why use this function to obtain form parameters? Thank you ------ solution ------------------ In my opinion, it is mainly convenient to get variables that may be uncertain for get or post! Because $ _ REQUEST is not good ------ solution -------------- DiscuzX-

Perhaps read too many successful books, perhaps is surrounded by too many successful people, so that everyone is selling pointed head to the success of drilling, they unscrupulous, hard work, the steal, hardships to torture themselves desperately, just to let themselves in the community, get more names, get more benefit.If you think about it, the life of man is like a bucket to history, and our so-called glorious life is like a blip. There are so many great men in history who remember their name

Since high school has been thinking about the meaning of the so-called life, then came to the conclusion that it is not too late to go to college. Then I went to college in a strange sense.Actually thought before, but did not draw any conclusion, now think, this did not draw any conclusion is correct.Because for me personally, life has no meaning, often hanging in the mouth of the realization of life goals,

Parse the meaning of the XHProf Report field and the xhprof Report field. Parse the meaning of the XHProf Report field. the xhprof Report field FunctionName: method name. Cils: the number of times a method is called. Cils %: number of methods called at the same level of the total number of methods called XHProf resolution of the meaning of the reported field, xhp

PHP common error hint meaning explanation (practical!) Worth collecting), error tips worth collecting This article explains the meaning of common PHP error hints. Share to everyone for your reference, as follows: In the learning of PHP, often encountered a variety of error hints, today see this error hints and explanations feel very good, now turn around, for us to learn. Oh..... 1. notice:undefined variab

November, the winter solar term is just the relay stage of autumn and winter, the intensity of Siberian cold and Mongolian high pressure is obviously strengthened, and the cold front is the vanguard force, which affects most parts of our country. At this time the cold air brings us the weather feeling, in the normal year, is no longer the autumn wind send cool, but with the winter significance of the wind cooling. But if the climate is warmer, this season of transition, the intensity of cold air

Today in doing JMeter stress test also appeared before the usual anomalies, such as, for a long time do not get this, and a little overwhelmed, so simply to summarize the problem:I have written two articles before, and have studied this question, see the following connection:Connection 1:http://www.cnblogs.com/garinzhang/archive/2013/03/20/2970901.htmlConnection 2:http://www.cnblogs.com/garinzhang/p/jvisualvm_resolve_permgen_space.htmlThis time in the online search, want to completely solve this

The meaning of volatile is "volatile, easy to change". The meaning of this qualifier is to indicate to the compiler that the contents of a variable may change as a result of another program's modification. Usually when a variable is declared in a program, the compiler tries to store it in a general-purpose register, such as EBX. When the CPU puts its value in the EBX, it will no longer care about the value

The meaning of void Void is "no type" and void * is "no type pointer" and can point to any data type.void specification for use of pointersThe ①void pointer can point to any type of data, that is, the null pointer is assigned to a pointer of any data type. For example:int * PINT;void *pvoid;PVOID = pint; * * But can not pint= pvoid; */If you want to assign pvoid to other types of pointers, you need to force type conversions such as: pint= (int

Label: This paper first introduces the meaning of Ken_len in the query plan of MySQL, then introduces the calculation method of Key_len, and finally, through a fake example, shows how to see how many columns of the federated index are used by Key_len.The meaning of Key_lenIn MySQL, you can view the path to the SQL statement through explain, as shown here: Mysql> CREATE TABLE t (a int primary key,

Reprinted from: http://www.cnblogs.com/davygeek/p/5670212.htmlLearn to write a script today encountered some variables do not know, here do the next record. Variable Meaning $ File name of the current script $n Arguments passed to the script or function. N is a number that represents the first few parameters. For example, the first parameter is $ $, and the second argument is a $

1. Create a simple script variable:Vim variable2. Modify the contents as follows:#!/bin/SHEcho "number:$#"Echo "scname:$0"Echo "First : $"Echo "second:$2"Echo "Argume:[email protected]"Echo "Show Parm list:$*"Echo "Show Process id:$$"Echo "Show Precomm stat: $?"3. Execute the Script./variableThe meaning of some parameters in a Linux shell script: $# is the number of arguments passed to the script. The name of the script is the first parameter that is

please explain below The whole line of code in the Shell script that starts with if, have you seen the application scenario ?if (kill-0 $pid 2>/dev/du11) then echo "Oldboy" Else echo "Oldgirl" fiInterview question: Please explain the meaning of if (kill-0 $pid 2>/dev/null) code?if (kill-0 $pid 2>/dev/null) then echo "Oldboy" Else echo "Oldgirl" fiThe old boy answers the main points: kill-0 $pid 0 means not to send any signal to the PID correspon

Http://wenku.baidu.com/link?url=9Q9VU54XuvlN77urP1zwOLVMMrS2EFNx4HcvFizdPl-zQy3K_ Ipd3o-mdu4sbihezumnq0blbwhusuaol_y6quvkxtgjiaem9gq9i-jb5_e Shell in the condition to determine if in the-Z to-D meaning 2011-09-05 [-a file] if the file The existence is true. [-B file] True if file exists and is a block special file. [-C file] True if file exists and is a word special. [-D file] True if file exists and is a directory. [-E File] True if file exists. [-F

Original URL: http://dadekey.blog.51cto.com/107327/119938let's start by writing a simple script that will explain the meaning of each variable after execution .# Touch Variable# VI VariableThe script reads as follows:#!/bin/shecho "number:$#"echo "Scname:$0"echo "First: $ $"echo "Second:$2"echo "Argume:[email protected]"echo "Show Parm list:$*"echo "Show Process id:$$"echo "Show Precomm stat: $?"Save Exit assigning script Execution Permissions# chmod

files for each of the devices it can guide in this directory during the installation process. This means that you rarely need to create it yourself.As hardware moves out of the computer, the names become more blurred. Fortunately, today's high-grade software blocks on Linux use easy-to-understand names for history and hardware. For example, well, Pango (http://www.pango.org/) is one of them.If you are interested in these things, then I suggest you read the grand, but some of US English history-

@Test publicvoidtestcalendar () { calendarc=calendar.getinstance (); c.set (2000, NBSP;3,NBSP;13,NBSP;14,NBSP;15,NBSP;16); c.set (calendar.millisecond,123);// Random output NBSP;NBSP;NBSP;NBSP;SYSTEM.OUT.PRINTLN when not set (Formatutils.datetimestring (C.gettime ())); system.out.println (C.get (calendar.year) + " Input results 2000-04-13 14:15:162000316351310421421516123 Note: Calendar.day_of_week_in_month meaning: The month of 1-7 is the 1th week, 8

and profound, the whole such abbreviation is too professional, people are around dizzy. It is easier to understand from the English explanation or the Chinese full name.Pointer array: Array of pointers, which is used to store pointers to arrays, which are arrays of elements that are pointersArray pointer: A pointer to an array, which is a pointer to the arrayAlso note the differences in their usage, as illustrated below.int* a[4] Pointer array: The elements in array A are all int pointers (if t