convenience of the optional parameters of C #, it would be nice to think of JavaScript as such.Fortunately, JavaScript provides a simple, lightweight idiom: an option object. The effect of the optional parameter is basically reached.fun({ width: 200, height: 200, action: ‘action‘, color: ‘green‘, ignoreError: true});Relatively, more cumbersome, but easier to read. Another benefit is that the parameters are optional.If there is a required parameter, then when designing the API. It is recomm
objects in a stateless method
Supports the method chain by returning this in a stateful method
The stateless API part capability is to speak of complex operations that decompose into smaller operations. such as replace:function escapeHtml(str){ return str.replace(//g, ‘amp;‘) .replace(/If you do not use a method chain, the code should be the following:function escapeHtml(str){ var str1 = str.replace(//g, ‘amp;‘); var str2 = str1.replace(/The same functionality will result
?" Classno= "+Encrypt.Md5encrypt (CLASSNO); }Repeater.DataSource =Newss.Take (count);Repeater.DataBind (); }}catch (Exceptione) {}}#region Website VisitsProtectedvoidPageviews () {IntCount = 0;Data accumulationIntStat = 0;StreamReaderSrdGet the actual path to the fileStringFile_path =Server.MapPath ("/xml/counter.txt");Open a file for readingSRD =File.OpenText (File_path);while (Srd.Peek ()! =-1) {Stringstr =Srd.ReadLine ();Count =Int.Parse (STR); }Srd.Close ();Code to run when a new session is
Function Al () {Alert ("I Rub")}At this point, Al represents the object of the function, and Al () is directly running.var Nfun=al; Nfun also points to Al, when Nfun () is the equivalent of Al ().So let's just say obtn.onclick.Obtn.onclick is also equivalent to a nfun, except that it is attached to the OBTN tag.An equal sign is an assignment that, if it is an object, points the object to the variable. Al is the object point, Al () is the function, it is finally something, just look at the functi
function MousePosition (e) {//IE9 above the browser gets the if (E.pagex | | e.pagey) {return {X:e.pagex, Y:e.pagey}; //IE9 the document in the following//ie is not actually in (0,0) position, there is a small (usually 2px) border around it, Document.body.clientLeft and Document.body.clientTop contain the width of this border return {X:e.clientx + document.body.scrollleft-d Ocument.body.clientLeft, Y:e.clienty + document.body.scrolltop-document.body.clienttop}; }
Then let's see which authority I began to doubt today...
Since I started programming, and since I came into contact with the array, I have been seeing reminders at different places and at different times: when using for to traverse arrays, you must use for (VAR I = 0, n = arr2.length; I
oh? We will not talk about other Program languages here, but only about Js. Different languages may have different implementations, we need to explore other l
When drawing a chart, multiple data backgrounds do not specify a color, so the foreground needs to use a random color, to record a small method:function Randomcolor () { var arr = [' A ', ' B ', ' C ', ' d ', ' e ', ' f ', ' 0 ', ' 1 ', ' 2 ', ' 3 ', ' 4 ', ' 5 ', ' 6 ', ' 7 ', ' 8 ' ', ' 9 ']; var chars = '; for (var i = 0; i ) {+ = Arr[math.round (Math.random () * +)] } return ' # ' + chars;}JS
45 change once every 1 seconds;The code is as follows:onload= "show ()" > ------------ means that when the page is loaded, the event can be executed without Write dynamic clock with JS 2017-03-23
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