chapter 5  programming r with rstudio

... getprint( ), getstore( ), or mirror( ), returns true if the request was successful is_error($rc) Given a status code from getprint( ), getstore( ), or mirror( ), returns true if the request was not ... categories of informational, successful, redirection, error, client error, or server error It also exports symbolic aliases of HTTP response codes; one could refer to the status code of 200 as RC_OK, ... Returns the number of seconds the robot must wait before it can request another resource from the server $netloc is of the form of: user:password@host:port The user, password, and port are optional...

Ngày tải lên: 24/10/2013, 08:15

... 200 through 299 is_redirect( ) Returns true when the response code is 300 through 399 is_client_error( ) Returns true when the response code is 400 through 499 is_server_error( ) Returns true when ... through 399 $r- >is_error( ) Returns true when the response code is 400 through 599 When an error occurs, you might want to use error_as_HTML( ) to generate an HTML explanation of the error $r- >message([$message]) ... a proxy server A proxy server is usually used in firewall environments, where the HTTP request is sent to the proxy server, and the proxy server forwards the request to the real web server If...

Ngày tải lên: 24/10/2013, 08:15

... Anyone familiar with the xwebster client for the X Window System will find xword to be vaguely familiar, but our version doesn't require a local licensed dictionary server; we use one already existing ... at our program: #!/usr/bin/perl use Tk; require LWP::UserAgent; use HTML::Parse; We first use the #! notation to tell the kernel we'll be using Perl We need the Tk package for the GUI interface, ... are always built referencing another part of the GUI, if not the main window (in our examples, $mw), then another widget or frame This builds the parent/child hierarchy and allows the packer...

Ngày tải lên: 07/11/2013, 09:15

... if ($response->is_error) { $INFORMATION = "ERROR: Could not retrieve $url"; } elsif ($response->is_success) { my $html = parse_html($response->content); ## Clear out text item $text->configure(-state ... (unlike our heading tags, which remained the same no matter where they were in the document, or what text they surrounded) We use a regexp to extract the URL from our $extra variable We create a ... declare ourselves done for that particular word lookup Our function, display_html, gets called with three arguments: a $node pointer, a $startflag flag, and the $depth we are into the tree We...

Ngày tải lên: 07/11/2013, 09:15

... letter, it would scroll to the first entry starting with that letter Or you could put an additional entry, and search for any word starting with those characters: my $response_f = $mw->Frame; $response_f->pack(-expand ... \&do_query)-> pack(-side => 'left', -anchor => 'w'); The buttons for our track program allow us to exit the program, start the query loop, or manually a query right now my $pkg_tracker = new ... $listbox->get($listbox>curselection); $pkg_tracker->check($airbill, $dest, $date); if ($pkg_tracker->retrieve_okay) { if ($pkg_tracker->delivered) { $response_txt = "Tracking number $airbill was delivered to:...

Ngày tải lên: 07/11/2013, 09:15

... autohandler -> Information about your order Your order included the following items: generate item listing here my $order_date = $session{user}>last_order_date; ... whether to display a certain navigation bar or to omit it, whether the user must have certain characteristics in order to view this page,1 and so on In the current version of Mason, each attribute ... text For these situations, the Mason interpreter provides the make_component() method It accepts a comp_file or comp_source parameter (letting you create a component from a file or a string, respectively)...

Ngày tải lên: 14/12/2013, 12:15

... request object created by the make_subrequest method inherits its parameters from the parent request, except for those that are explicitly overridden A Caution About Autohandler Inheritance Remember ... will repeat the content block for every database row returned by an SQL query, and the $_ variable will hold the data for each row, as returned by the DBI method fetchrow_hashref() The query itself ... in the various @INC directories or to telling Unix or Windows to look for executable programs in your PATH In Chapter and Chapter you will learn more about how to configure Mason; for now, we...

Ngày tải lên: 14/12/2013, 12:15

... "nsIPref"; const PREF_STRING = "browser.dom.window.dump.enabled"; try { var Pref = new Components.Constructor(PREFS_CID, PREFS_I_PREF); var pref = new Pref( ); pref.SetBoolPref(PREF_STRING, true); ... other XML markup By connecting web pages and XML documents to scripts or programming languages, the DOM is not a particular application, product, or proprietary ordering of web pages Rather, it ... for(var list in el) dump("property = "+list+"\n"); console output(subset): property = nodeName property = nodeValue property = nodeType property = parentNode property = childNodes property...

Ngày tải lên: 14/12/2013, 12:15

... parent="true"> 5.3.2.2 Capturing ... As you've already seen, events tend to rise up through the DOM hierarchy a natural process referred to as event propagation or event bubbling The next two sections describe event propagation ... are comfortable with how JavaScript works in the context of the user interface layer and are familiar with some of the primary DOM methods used to manipulate the various elements and attributes,...

Ngày tải lên: 14/12/2013, 12:15

... directory in the file picker fp.displayDirectory ( dir ); // read a line from an open file file.readLine(tmpBuf, 1024, didTruncate); // create a new directory this.fileInst.create( DIRECTORY, parseInt(permissions) ... window.arguments array This array holds a list of the arguments passed to a window when it is created window.arguments[0] is a reference to the first argument in the openDialog( ) parameter list ... user feedback Try this example and experiment with different sources of data, such as a menu of different auto manufacturers, different styles on group of boxes that come from user selection, or...

Ngày tải lên: 14/12/2013, 12:15

... "@mozilla.org/network/standard-url;1"; const SND_I_URL = "nsIURL"; const SND_URL = new C.Constructor(SND_NETWORK_STD_CID, SND_I_URL); var url = new SND_URL(); url.spec = 'http://jslib.mozdev.org/test.wav'; ... 5.5 JavaScript Application Code There are two ways to use JavaScript in the third, deepest level of application programming The first is to organize your JavaScript into libraries so your functions ... important parameters here are -w, which enables warnings output, and -s, which turns on strict mode The source files for JSLib are well annotated and easy to read JSLib provide easy-to-use interfaces...

Ngày tải lên: 14/12/2013, 12:15

... add_site { return if ($url eq ""); ## Do nothing, empty string ## Validate $url contains correct information (ie a server name) $url = "http://$url" if ($url !~ /(\w+):\/\//); ## Insert new site ... FH; } $url = ""; Here is where we take advantage of a "remembering" file When the program exits, we will save the current list of sites to this file This way, when the program is started the ... specifying -borderwidth and -relief options You'll note that it looks like a lot of extra effort to declare sub { do_search() } Doing it this way prevents any parameters from being sent to our function...

Ngày tải lên: 14/12/2013, 13:15

... calls: rgb_color rgb_color currentHighColor; currentLowColor; currentHighColor = HighColor(); currentLowColor = LowColor(); Colors 139 The default high color is black, so if you invoke HighColor() ... pattern parameter Here the rectangles just defined are drawn with a black and white checkerboard pattern: StrokeRect(outerRect, B_MIXED_COLORS); FillRect(innerRect, B_MIXED_COLORS); 164 Chapter ... 5: Drawing Figure 5-4 The ColorControl program’s window that results from running at 8-bit color Figure 5-5 The ColorControl program’s window that results from running at 32-bit color Colors 147...

Ngày tải lên: 26/01/2014, 07:20

... Comparator makes the comparison A ? B “?” is determined by the input greaterNotLess and returns true(1) or false(0) module comparator (result, A, B, greaterNotLess); parameter width = 8; parameter ... module adder (sum, carry_out, carry_in, ina, inb); output [3:0] sum; output carry_out; input [3:0] ina, inb; input carry_in; wire carry_out, carry_in; wire [3:0] sum, ina, inb; assign {carry_out, ... Chapter 1: Chapter 2: Chapter 3: Chapter 4: Chapter 5: Chapter 6: Chapter 7: Chapter 8: Chapter 9: Chapter 10: Introduction Modules and hierarchical structure Fundamental concepts Structural modeling...

Ngày tải lên: 16/03/2014, 15:20

... Name="ModifiedDate" ParameterName="ModifiedDate" Version="Current" />

Ngày tải lên: 18/06/2014, 17:20

... tying up brokers and manpower entering sell orders Just one simple order in the futures will suffice instead However, for the individual trader or smaller portfolio manager, such a macro approach ... a price so far below the current market value of your portfolio that it doesn’t really you any good If you want to retain protection, your only recourse is to buy more insurance at higher prices ... but there is no way to know for sure There are two ways around tracking error One would be to buy puts on the individual stocks in your portfolio In that way, there would be no tracking error at...

Ngày tải lên: 03/07/2014, 19:20

... Daily Reports for other markets monitored by VantagePoint The eurodollar, 2-year Treasury notes, 5-year Treasury notes and the 30-year Treasury bonds daily reports, for example, add considerable ... exportable to other software programs Additionally, all of the indicators presented in the Daily Report can be displayed or printed as detailed color charts, for traders who are more visually oriented ... forecasts for each target market using five separate neural networks There’s a lot of horsepower under the hood, but you don’t have to be a race-car driver to get your intermarket driver’s license...

Ngày tải lên: 04/07/2014, 13:20

... further that there are only two sources of uncertainty: (1) the average quarterly growth rate of revenue, and (2) variable cost as a percentage of revenue We assume that average quarterly revenue ... chart like that displayed in Figure 5.11, which clearly shows the difference in dispersion between the forecasts for Portfolio ROR (1) and Portfolio ROR (9) You can create an overlay chart for ... Portfolio ROR (1) and Portfolio ROR (9) displayed in Figure 5.9 Note how the certainty bands diverge from left to right, but remain centered on 12.5 percent They correspond very well to the theoretical...

Ngày tải lên: 05/07/2014, 18:20

... Derived controls/forms have two approaches may register for base class events may override corresponding virtual functions (if provided) Decision driven by functionality desired, not performance ... versus override approach equivalent in many cases overriding provides control over when/if events are fired public EveryOtherClickButton : Button { private int clickNum = 0; } protected override ... will be used on a Windows Form Inherits from System.Windows.Forms.UserControl Inherited Properties can override these properties Inherited Events can override these inherited events if you need...

Ngày tải lên: 05/07/2014, 21:20