Simple .NET/ASP.NET PDF document editor web control SDK

Many of the existing frameworks will help you modify part of the page, and thanks to solid DOM support in modern browsers, this approach is much easier than you think. Figure 8-2 shows A9 s BlockView feature, an example of the Partial Page Paint pattern. When you select a different part of the map on the left, the corresponding pictures of the street automatically change to reflect where your map is pointing (assuming pictures exist).

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For the first argument, you try to define a function that will print the Year property of the DateTime type Then you rewrite this function call using the forward operator #light open System let dateList = [ new DateTime(1999,12,31); new DateTime(1999,12,31); new DateTime(1999,12,31) ] Listiter (fun d -> print_int dYear) dateList dateList |> Listiter (fun d -> print_int dYear) When trying to compile this function, you ll get the following error: Listiter (fun d -> print_int dYear) date_list ------------------------------^^^^^^^ Progfs (11,33): error: Lookup on object of indeterminate type A type annotation may be needed to constrain the type of the object in order for the lookup to be resolved Note that you receive only one error, when the Listiter function is written without the forward operator Written with the forward operator, it compiles successfully.

The error you receive means that the compiler has not been able to work out the type of the parameter d, so it cannot verify that it has a property Year In the second case, by using the forward operator, the compiler is able to infer the type of the function is DateTime -> unit because it has already seen the list dateList and knows it is of type SystemDateTime list One subtlety to watch out for is that, when working with types defined in F#, the compiler can often infer the type from the way it is used Consider the next example, where you rewrite the previous example, this time using a date type that you ve defined as an F# type, rather than a SystemDateTime, which is defined in a library not written in F#.

Another interesting long-term experiment is to observe the temperature of a disposable hand warmer over time (see Figure 14-12) using the Temperature Sensor from 5. Hand warmer devices work by an exothermic chemical reaction that creates rust inside a porous bag. There s some iron dust in the bag, along with some other ingredients that cause the iron to rust quickly and heat up when it s exposed to moisture in the air. It can take ten hours to fully use up the supply of chemicals in the bag.

Portals were supposed to be the solution to all our problems. Corporate intranet sites were designed to be one-stop shopping for employees to have all the information they needed at their fingertips. Your most frequently used applications, links to your key reports, industry news a customized portal was supposed to be the answer. Unfortunately, corporate intranets never really took off, but at least part of the reason had to do with clumsy interfaces for adding new sections and moving existing ones. Typically, you had to go to a separate administration page to make your changes (a full-page refresh), save your changes, and return to your home page (another page refresh). While this approach worked, it certainly wasn t ideal.

#light type date = { year : int; month : int; day : int }.

For this project, you ll combine two NXTs. An NXT can communicate with another NXT using a wireless technology called Bluetooth. One NXT has the back-mounted joystick from 6 and is running a program called bluesend. The other is the NXT Quick Start Vehicle running a program called bluereceive. Figure 14-13 shows the pair ready for action.