csa study guide

Object.getownpropertydescriptor () . To set attributes for a property, or to have a new property with some attribute, you need to call Object.defineproperty (), pass in the object you want to modify, the name of the property you want to create or modify, and the property descriptor Object.18. to detect whether an object is a prototype of another object or in a prototype chain, use the isprototypeof () method . Similar to the instanceof Operator.19. to get the class of the object, you can call t

default when @param string $value has a value*/function Idselect ($SqlForm, $SelectName, $class, $SqlId, $SqlColumn, $title, $value) {$SEARCHSQL = mysql_query ("select * FROM {$SqlForm}");while ($Search = Mysql_fetch_array ($SEARCHSQL)) {$key = $Search [$SqlId];$option [$key] = $Search [$SqlColumn];}Return Select ($SelectName, $class, $title, $option, $value);}function Select ($name, $class, $title, $option, $value) {$result = "". Option ($title, $option, $value)."";Returns a full drop-down men

"$octal"]Ten Thenecho "$decimal equals $octal"Elseecho "$decimal isn't equal to $octal" # Equal to 017+ fi # doesn ' t evaluate within [single brackets]!if [["$decimal"-eq "$octal"]]Thenecho "$decimal equals $octal" # equals 017Elseecho "$decimal is not equal to $octal"FI # evaluates within [[double brackets]]!((...)) Arithmetic testIf the expression evaluates to 0, its exit status code is 1 or FalseIf the expression evaluates to non-0, its exit status code is 0 or TrueIts exit status and [...]

independent permissions. Different databases are placed in different files. namingThe database will eventually become a file in the file system, the database name is the corresponding file name, so there are many restrictions on naming. The database is identified by name. can be any utf-8 string, except for the following special cases: cannot be an empty string (“”) must not contain/,\,.,’’,*,,>,:,|,?,$(a space),(NULL character). Basically, you can only useASCIIthe letters and numbers in

statements and focus on addition, deletion, modification, and query. Ability to test: http://blog.csdn.net/xc5683/article/details/8678255 2. Programming Language Java is recommended here. After all, Java is more popular today than runtime. It is also very easy to learn other languages. Objective: To understand the logic and object-oriented thinking of programming. Master a language. There are a lot of videos in this area. You can find them for yourself. 3. UML UML must be able to understand at

statements and focus on addition, deletion, modification, and query. Ability to test: http://blog.csdn.net/xc5683/article/details/8678255 2. Programming Language Java is recommended here. After all, Java is more popular today than runtime. It is also very easy to learn other languages. Objective: To understand the logic and object-oriented thinking of programming. Master a language. There are a lot of videos in this area. You can find them for yourself. 3. UML UML must be able to understand at

LTE beginners, if you also for the LTE self-study and confused;LTE scholars, if you're still worried about the effectiveness of LTE learning,If you want to learn LTE well instead of simply learning about LTE,To make LTE learning more effective than to save money,So, watch the video version of the LTE self-study guide so you can win over LTE.From then on, learn lt

mechanism: a production of chicken legs factory, there is only one line, worker a at the top of this line, he is responsible for the chicken leg plastic packaging, and he can only operate a awuawu at the same time (an event queue, The NODEJS process will only handle one event at a time). Workers A is very efficient, often see the process has been perfect chicken legs will not hesitate to carry out packaging, but whenever he saw some have not completed the process of chicken legs into the assemb

When it comes to data mining, we tend to focus on algorithms during modeling while ignoring other steps. In real world data mining projects, other steps are the key to determining project success or failure. Guide to intelligent data analysis is the book recommended by the knime official website (http://tech.knime.org/guide-to-intelligent-data-analysis), according to the CRISP-DM process describes the proce

The second chapter learns the R function:1 sum calculation and sum (x,na.rm=true) calculated in Vector x, which excludes NA elements2 Median calculates the median to return the number of the middle of a sample data median (x,na.rm=true)3 Max COMPUTE Max Max (x,na.rm=true)4 min Compute min min (x,na.rm=true)5 c () Connect data connection data to form a vector. C (a)6 Cbind data cbind with column variables (x, y, z)7 Rbind data rbind with row variables (x, y, z)8 vectors in vector form with data v

each 1 is replaced by M, 2 is replaced by FUsing the reclassify factor variableBoxPlot (GSI ~ fsex,data = Squid)M1 Summary (M1) call:lm (formula = GSI ~ Fsex + flocation, data = Squid) residuals: Min 1Q Median 3Q Max-3 .4137-1.3195-0.1593 1.2039 11.2159 coefficients: Estimate Std. Error t value Pr (>|t|) (Intercept) 1.35926 0.07068 19.230 　　(There is only one Insert script feature found)M2 　　The estimated parameters are consistent, but the second method oc

, Table. getn (mytable) Do Print (mytable [Index]) End Table. Sort (mytable) This simple function traverses the entire table and rearrange it from small to large. 6.2. Table. insert (mytable, positon, value) Table. the insert function inserts a new value in Table China. The location parameter is optional. If no value is set, a new value is added to the end of table A. If this value is specified, it is inserted to the specified position. Table. insert (mttable, 25, "hello ") 6.3.

character. A reserved word is a reserved keyword that may not be a keyword now, and may become a keyword later.6. Object and array initialization expressions are actually creating a new object or arrays. Also known as: Object direct amount, array direct amount, however they are not original expression.7, array initialization, if there is no value in the middle, can be omitted directly;var myArray = [,,, 3]; Two values are omitted in the middle and are automatically populated with undefinedvar m

9 1996" can also be accepted and parsed. However, the result Date object includes "Friday November 9 1996". JScript handles all of the standard time zones, as well as global standard times (UTC) and Greenwich Mean Time (GMT). Hours, minutes, and seconds are separated by colons. Although not all of these three items need to be specified. "10:", "10:11", and "10:11:12" are valid. Assuming a 24-hour clock is used, it is wrong to specify "PM" for the time after 12 o'clock noon.For example, "2

Chapter III1, the value of inheritance is not special, even 0 of the particularity of not. So changing the style of a hyperlink generally requires an independent declaration and cannot be changed by inheritance.2. Cascading-conflicting declarations are sorted by this cascading process and thus determine the final document representation. The core of this process is the particularity of selectors and their related declarations and the inheritance mechanism.Fifth Chapter1, Font-weight:border. Firs

12th chapter list and generated content1, List-style-type:cjk-ideographic generate 1234 of the serial number2, whether it is UL or Ol,list-style-type unrecognized values are applied to decimal.3, the list-style-image will inherit.4, Shorthand: List-style:type | Image | PositionThe 13th Chapter user interface style;1. Outlines are similar to borders, but outlines do not participate in the document Flow .2. Outlines and borders can coexist .3, the contour of the four sides of the style (including

Margin-bottom, to clear the element set Margin-top is not convenient (the reason for clearing the area).7. For a non-root element, if the position value is absolute, the containing block is the nearest position value is not a static ancestor element .8. Top/right/bottom/left applies to elements where the position value is not static. The margin boundary of the element contains the offset of the inner margin boundary (border) of the block relative to it.9. Top:auto;left:auto in Position:absolute

element node, 3 represents the text node, 8 represents the comment node, and 11 represents the DocumentFragment node .14. The children property of the element object, similar to ChildNodes, is also a NodeList object, but the children list contains only the element object .15. The text and comment nodes do not have a children property, meaning that the Node.parentnode property cannot return a text or comment node .16. The Style property value of any HTML element is a cssstyledeclaration object,

the form is submitted .7. The onchange event handler for the text input field is triggered when the user enters new text or edits an existing text, indicating that the user has finished editing and moved the focus out of the text field .8. If the user directs to a new fragment in the document, thelocation.href will change , but document. The URL does not.9, document.write () joins its string argument, and then inserts the result string into the document where the script element is called.10. Th

server contains 3 parts: 1, a number and a text-based status code to show the success and failure of the request. 2. A collection of response headers. 3, the response body. 6.get is used for regular requests , and he applies when the URL completely specifies the request resource when the request does not have any side effects on the server and when the server's response is cacheable. The post method is commonly used in HTML forms , which contain additional data in the request body and are often