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

Applications have bugs. It s a fact of life. Pretending that your app is perfect won t make the problem go away, but only makes its bugs more difficult to squash. In order to quickly detect bugs and determine the root cause, developers often rely upon logging and debug information placed within their apps. This leads to a quandary. Ideally, you would like to place debugging features in your app so you can quickly and conveniently debug any problems that come up. However, you probably don t want end-users to have access to the program s inner workings. This often leads developers to create separate debug and release versions of their application. This in turn has problems, as it means that the version a developer uses for testing isn t exactly the same as the version that people are actually using. Few things are more frustrating than finding a bug in the release version, which you cannot debug, which does not appear in the debug version.

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Shift (left shift key at the OS progress menu): Bypass automatic login. T: Boot from Target Disk Mode, turning a system into a glorified FireWire drive (including access to optical drives). Trackpad button: Ejects media from the optical slot/tray. X: Forces the system to boot into Mac OS X (used only with systems that can run OS 9).

function AlwaysLocalScope() { info("AlwaysLocalScope{scopedVariable}", typeof(scopedVariable)); eval( "var scopedVariable;"); eval("scopedVariable = 'AlwaysLocalScope'"); info("AlwaysLocalScope{scopedVariable}", "scopedVariable=" + scopedVariable + " type=" + typeof(scopedVariable)); } In the latest modification, the first eval is the declaration of scopedVariable using the var keyword The first eval call results in the declaration of scopedVariable as a local variable The second eval call assigns a value to scopedVariable, which is scoped as a local variable When declaring variables in the context of functions or in global scope, keep the following points in mind: There are two scopes to a variable: local to a function and global A local variable is declared using the var keyword, with the exception being the use of var in a global context The use of var does not need to be at the beginning of a function A global variable is declared when a variable is assigned without using the var keyword.

You can also boot an Xserve to a NetBoot server, using the start-up modifier keys without a keyboard. To do so, boot the system holding down the system-identifier button until the top row of lights blink in succession, Knight Rider style. At this point, let go of the system identifier button, then press it again, and you ll notice that the bottom light will change positions. The position number, from right to left, indicates the following:

The most primitive method of debugging is to make your program print out information about what it s doing. While low-tech, it can also be perfect. If the phone is not able to connect to the network, and when you hook it up to the logger you see the message ERROR: Permission not set to open connection, you have cut an hour-long debugging session down to a few minutes. BlackBerry makes it easy to get logging information. Simply connect the device to your PC with a USB cable, start Eclipse, and start debugging the BlackBerry device. Even if you do not have access to the source code or .debug files, you will be able to watch the

1: Boot from an optical drive (similar to using the C modifier) 2: Boot from a NetBoot server (similar to using the N modifier) 3: Startup from the first blessed system found on an internal drive (useful if going

It is good practice to declare variables at global level scope using the var keyword Local and global variables with the same name do not overwrite each other A locally declared variable hides a globally declared variable with the same name When a variable is not declared, using typeof on the variable results in undefined You can unset global variables using the delete operator When using recursive functions, you should use locally declared variables Recursion typically involves an initialization and an execution Using JavaScript, the initialization and execution can be wrapped into a single function Wrapping initialization and execution in a single function uses expectations, where the availability of variables is tested to determine a calling context It is possible to use eval to dynamically declare local or global variables Using eval causes the JavaScript processor to not perform a look-ahead when identifying local variables.