... precaution has been taken in the preparation of this book, the publisher and authors assume no responsibility for errors or omissions, or for damages resulting from the use ofthe information contained ... recipe, the queue consists of tuples ofthe form (-priority, index, item) The priority value is negated to get the queue to sort items from highest priority to lowest priority This is opposite ofthe ... In order to perform useful calculations on the dictionary contents, it is often useful to invert the keys and values ofthe dictionary using zip() For example, here is how to find the minimum and...
... prepare a context pop up for activation First, you must attach the popup element to a widget in the UI by usingthe id ofthe pop up that must correspond to the context ofthe widget:
... the mean -square value of x Thus the variance is the difference between the mean -square value and thesquareofthe mean value That is, the variance is the expected value ofthesquareofthe ... À mx is the deviation of x from the mean value mx The mean ofthe squared deviation indicates the average dispersion ofthe distribution about the mean mx The positive square root sx of variance ... satisfies the superposition principle, which states that the response ofthe system to a weighted sum of signals is equal to the corresponding weighted sum ofthe responses ofthe system to each of the...
... conveniences in the form of PerformActionOnRow and performActionOnCell selectionChanged Should be hooked up to the onselect handler ofthe element in the XUL content 3.4.3 Grid A is another ... this example, the view that is exposed in the nsITreeView XPCOM object is essentially the lifeline forthe tree, supplying the data that populates the view The view is assigned to the code object ... url("chrome://xfly/skin/images/tab.gif"); } 3.6 Form Controls In the HTML world, the textbox is one ofthe most commonly used elements in a form control While the XPFE toolkit has no concept of a form, it was originally...
... with the type menu-button to display more than one option at a time The default orientation for this type of button is forthe menu to be to the right ofthe button Mozilla uses buttons of type ... example of broadcasting is the disabling of a group of elements a menu item and a separate button for viewing source, for example when the source for a web page is not available The state of a ... label="Go For It!" oncommand="doExtraFunction( )"/> The buttonpack attribute determines whether the buttons appear on the right, left, or center ofthe window If no value is given, the default platform...
... namesake You could change the coordinates ofthe child elements on the screen by usingthe top and left attributes The order ofthe children in the XUL content determines the z-ordering on screen ... this, there is no restriction on the content that can go into the panels themselves Forthe panels to display content properly, there have to be the same number of children and tabs in the tab ... CSS, for example These properties are not part ofthe CSS specification, so you may need to go one step further and use the format -moz-box-pack These special extensions to CSS are described in the...
... the cursor over a piece ofthe UI The hovering behavior of a tooltip is useful for many things, including abbreviated help and the display of values that are otherwise obscured in the UI In the ... written based on the file size and the bandwidth values to formulate the time remaining The second of three modes of a progress meter is the undetermined mode, in which the time forthe operation ... appearance for a tooltip: Create the content Attach it to the pop-up element you will be using Give the pop up a unique ID The following snippet shows the kind of tooltip you can create and then reuse...
... createTextNode for DOM querying and manipulation ofthe actual document Further details about the DOM are available in Chapter Other types of document objects include the width and height ofthe window, ... array of all the second-level nodes in relation to the document, and could be extended to walk to the whole tree Using nodes in the structural representation ofthe document to get to other nodes ... the document object model of any XUL file or web page For more information about the DOM Inspector, see Appendix B 3.2 Application Windows is just one ofthe possible root elements of...
... signals to the network medium • Transmission refers to either the process of transmitting or the progress of signals after they have been transmitted Analog and Digital Signals • Information transmitted ... consists of color-coded pairs of insulated copper wires • There are two types of twisted-pair cables: STP and UTP 49 Summary (continued) • There are a number of Physical layer specifications for Ethernet ... final cost of implementing specific type of media: – Cost of installation – Cost of new infrastructure versus reusing existing infrastructure – Cost of maintenance and support – Cost of a lower...
... Now the first date is in the 20th century, and the others are in the 19th Note that the only change to the code is in the OPTIONS statement The value of YEARCUTOFF is 1840 instead of 1920 Forthe ... procedures will use the formats specified in the FORMAT statement that is part ofthe PROC step instead ofthe formats associated with the variable in the dataset Therefore, in the above example, ... January and the first Thursday ofthe year Therefore, if the first Monday ofthe year falls on January 2, 3, or 4, the preceding days ofthe calendar year are considered a part of week 53 ofthe previous...
... the “U” is facing to the right, the pin would kick over the part as shown by the dotted lines If, on the other hand, the bottom ofthe “U” had been to the left, the motion of pin would have no ... is therefore knocked off the platform at either station 1, 2, or 3, depending on its height WEIGHT- REGULATING ARRANGEMENTS The material in the hopper is fed to a conveyor by the vibration ofthe ... closes the gate The position ofthe counterweight on a frame determines the feed rate ofthe system The indexing table automatically stops at the feed station As the material drops into the container,...
... support the roof The area ofthe pontoon will vary between 25% and 55% ofthe roof area The pontoon roof is the most common type of floating roof in use today The double-deck floating roof has ... gravity is the ratio ofthe density of a solid or a liquid to the density of water or the ratio ofthe density of a gas to the density of air Density is weight per unit volume To calculate the pressure ... place ofthe conventional cone roof The diaphragm rests on a special set of roof supports so that when it is in the down position it is below the top ofthe tank The roof is fastened at the edge,...
... years, rent the units out, and pay down the debt At the end of 25 years, all ofthe debt will be paid off and the investor can live off ofthe rents It may be that this strategy works fine for many ... as well as others was quite favorable Within the first 90 days, I had commitments for 17 ofthe units What I was not prepared for was the poor credit quality of most ofthe prospec57 THE COMPLETE ... because ofthe extensive work required on the interiors ofthe units So I could add another $27,000 to the cost ofthe project, bringing the total up to $155,595, or $4,322 per unit At the price...
... Generally you'll want to open the database connection at the beginning ofthe response and simply make the database handle available globally forthe life ofthe request.1 The autohandler provides ... $m->decline will clear theoutput buffer before starting to process the next component Second, you may change the filename used for dhandlers, so that instead of searching for files called dhandler, ... remarkably like the hassle we were trying to avoid in the first place Anyone who has had to change the header and footer for one portion of a site without changing other portions ofthe site knows...
... hopes of being admitted to a sight ofthe young ladies, of whose beauty he had heard much; but he saw only the father The ladies were somewhat more fortunate, for they had the advantage of ascertaining ... returned, therefore, in good spirits to Longbourn, the village where they lived, and of which they were the principal inhabitants They found Mr Bennet still up With a book he was regardless of time; ... sisters and a cousin And when the party entered the assembly room it consisted of only five altogether—Mr Bingley, his two sisters, the husband ofthe eldest, and another young man Mr Bingley was...
... although the presence of aquaporins may alter the rate of water movement across the membrane, they not change the direction of transport or the driving force for water movement The mode of action of ... unless the force of gravity is opposed by an equal and opposite force The term Yg depends on the height (h) ofthe water above the reference-state water, the density of water (rw), and the acceleration ... potential ofthe cell is less than the water potential ofthe solution, the cell takes up water After equilibration, the water potential ofthe cell rises to equal the water potential ofthe solution,...