Re: Captured Download Torrent
Leana Eckes
Primarily it is that you (as a developer user on the platform) should (sorry, bad word) NOT want this transactional data in your development artefacts...as the development being done is usually designed to fit any data, not just the data you have been developing with and/or testing with. Not to mention the reconciliation of transactional data coming from one instance to a production instance which is still running (live).
Imagine this - you're developing in subprod, with data that will be promoted (via an update set) to prod and in subprod, you have INC00011234, which your development modifies...but at the same time, in prod, someone manually modifies the same INC...which one stays, when you move the update set to production?
...I suppose there could be "skipped records" that you would mark for manual reconciliation (like when doing an upgrade)...but that's an odd concept, in terms of development. Development should be agnostic of the data and only consider the data model.
Though, I do understand the desire to include scheduled jobs and some "data" elements in update sets as they are often parts of automation/workflows (developed solutions, as opposed to "transactional record data")...my recommendation for that, is to make sure your organization follows good change management practices as the implementation plan would need to account for some "live data changes" if/when scheduled jobs are involved. Theoretically, you *should* (there's that word again) be able to set up the new jobs in prod, set as inactive and then just associate the job with the other programmic elements in the update set (keeping "live data chagnes" to a minimum, when releasing a solution in production - simply "activating" the new jobs and "deactivating" the old ones - as opposed to modifying the existing records)...but now we're going down a theoretical rabbit hole...
Scheduled jobs are not captured in update sets in ServiceNow because update sets primarily focus on capturing changes made to records within the system, such as tables, fields, and their configurations.
While these items are not captured natively, we use a utility called "Add to Update Set". This utility allows you to add items to update sets that normally wouldn't get added. We use it for scheduled jobs and various other things and it allows you to add the scheduled job (or whatever else) to the update set and move it from one instance to another.
The success or the failure of a match attempt can be inspected by calling the hasMatch() function. QRegularExpressionMatch also reports a successful partial match through the hasPartialMatch() function.
In addition, QRegularExpressionMatch returns the substrings captured by the capturing groups in the pattern string. The implicit capturing group with index 0 captures the result of the whole match. The captured() function returns each substring captured, either by the capturing group's index or by its name:
For each captured substring it is possible to query its starting and ending offsets in the subject string by calling the capturedStart() and the capturedEnd() function, respectively. The length of each captured substring is available using the capturedLength() function.
You can retrieve the QRegularExpression object the subject string was matched against by calling the regularExpression() function; the match type and the match options are available as well by calling the matchType() and the matchOptions() respectively.
Note: Some capturing groups in a regular expression may not have captured anything even if the regular expression matched. This may happen, for instance, if a conditional operator is used in the pattern:
Constructs a valid, empty QRegularExpressionMatch object. The regular expression is set to a default-constructed one; the match type to QRegularExpression::NoMatch and the match options to QRegularExpression::NoMatchOption.
Returns the offset inside the subject string immediately after the ending position of the substring captured by the nth capturing group. If the nth capturing group did not capture a string or doesn't exist, returns -1.
Returns the offset inside the subject string immediately after the ending position of the substring captured by the capturing group named name. If the capturing group named name did not capture a string or doesn't exist, returns -1.
Returns the offset inside the subject string corresponding to the starting position of the substring captured by the nth capturing group. If the nth capturing group did not capture a string or doesn't exist, returns -1.
Returns the offset inside the subject string corresponding to the starting position of the substring captured by the capturing group named name. If the capturing group named name did not capture a string or doesn't exist, returns -1.
Returns a list of all strings captured by capturing groups, in the order the groups themselves appear in the pattern string. The list includes the implicit capturing group number 0, capturing the substring matched by the entire pattern.
Note: Only a match that explicitly used the one of the partial match types can yield a partial match. Still, if such a match succeeds totally, this function will return false, while hasMatch() will return true.
Returns true if the match object was obtained as a result from the QRegularExpression::match() function invoked on a valid QRegularExpression object; returns false if the QRegularExpression was invalid.
You can think of it as if the C# compiler creates a "new" local variable every time it hits the variable declaration. In fact it'll create appropriate new closure objects, and it gets complicated (in terms of implementation) if you refer to variables in multiple scopes, but it works :)
Note that as of the C# 5 compiler and beyond (even when specifying an earlier version of C#), the behavior of foreach changed so you no longer need to make local copy. See this answer for more details.
I believe what you are experiencing is something known as Closure _(computer_science). Your lamba has a reference to a variable which is scoped outside the function itself. Your lamba is not interpreted until you invoke it and once it is it will get the value the variable has at execution time.
Behind the scenes, the compiler is generating a class that represents the closure for your method call. It uses that single instance of the closure class for each iteration of the loop. The code looks something like this, which makes it easier to see why the bug happens:
Lambda expressions (in C#3+, as well as anonymous methods in C#2) still create actual methods. Passing variables to these methods involve some dilemmas (pass by value? pass by reference? C# goes with by reference - but this opens another problem where the reference can outlive the actual variable). What C# does to resolve all these dilemmas is to create a new helper class ("closure") with fields corresponding to the local variables used in the lambda expressions, and methods corresponding to the actual lambda methods. Any changes to variable in your code is actually translated to change in that ClosureClass.variable
In any case, "Closures" are NOT a concept related to loops, but rather to anonymous methods / lambda expressions use of local scoped variables - although some incautious use of loops demonstrate closures traps.
Inside of the generated class(container) it generates a field named as variable, having a captured variable with the same name and the method b__0() containing the body of the lambda.
So incrementing variable results in turn incrementing field of container class and because we get one instance of the container class for all iterations of the while loop,we get same output that is 10.
If a for-loop declares an iteration variable, that variable itself is considered to be declared outside of the loop. [Example: Thus, if the example is changed to capture the iteration variable itself:
Background is that we cpatured a channel but were not quite sure how we did, we went through the undo commands and undid back to where we thought the capture occurred, but even after that the channel was still captured. At some point further on, the channel was no longer captured.
When channels are selected, [Capture] [Enter] captures all parameters of those channels. Theywill remain unavailable for playback or submaster override until they are released from the capturedstate. Capture is a toggle state, so to release parameters from a captured state, press [Capture][Enter] again.
If a group of channels are selected, and some of those channels are captured and some are not,the first press of [Capture] releases all channels from the captured state and the second presscaptures all manual settings for the selected channels.
Uncaptured channels remain at their current values until restored to previous values or a newinstruction is provided. You may restore channels to their background or default state using the[Sneak] [Enter] feature (see Sneak, page 112). Or you may leave them in a manual state until anew instruction is received.
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