![]() ![]() ![]() If you're OK with ignoring warnings, then I'm not sure why you would bother, for the rest of us who treat warnings as errors you will have a lot of code to review and fix or annotate. If you are interested in migrating old code to NRT then refer to Update a codebase with nullable reference types to improve null diagnostic warnings but beware, many existing code bases will have thousands of warnings the first time you turn this on. This pretty much covers checking for your scenario and really complex ones by establishing a new set of conventions that developers need to abide by. One such improvement is Nullable Reference Type analysis. ![]() Good SDLC practices like testing your code before release would pick these types of issues up anyway, to get this level of checking from the compiler was simply not a priority.įast forward to today, the compiler has evolved and the devs have squashed all the bugs and have been able to focus on runtime and productivity improvements. This type of functionality was not in the original versions of the C# compiler.Ģ0 years ago, even if we could, the effort to do this level analysis on code on standard hardware would have significantly reduced developer productivity. There are a lot of possibilities to check for and in a large code base this effort needs to be expended for every variable and every invocation. ToString() is only obvious that it will raise a runtime error because it is a member declared method and if we can be sure that the object has not yet been initialized. ![]() What if the method being called was an extension method? Extension methods after all can be called from null references. Your example represents 2 lines of code that happen to exist next to each other in your script today: object obj = null ĭuring design time it is conceivable that more code might come to exist between these two statements, the net effect of this is that the additional logic might set a non-null value to obj: object obj = null īut what about parallel processing, what if obj were set from a different logic block running in parallel, such that between instantiation of obj and the call to obj.ToString() the value was set outside of the code we see here? It might help to think about this from another perspective. It is up to each individual developer or team to decide if they want to promote specific warnings to error status or if you treat all warnings as errors. Everything else that the compiler might have opinions about like conventions and code styles become warnings or notes. Only at the time of executing obj.ToString() can we know with certainty that the value of obj is null, everything else up to that point is an assumption at best. The fact that the value of a variable is null requires specific knowledge about the expected state of that variable at runtime. Once we start doing that what other assumptions might we get wrong?Įrrors are for genuine code violations. The compiler can't assume that the developer doesn't know that this will result in a runtime error. The developer might specifically want to induce a runtime error.The fact that the execution fails at runtime is not necessarily an error, it is only an exception that your application may or may not handle. The code itself satisfies all the compiler rules for compilation and execution. The short answer to why it is a warning and not an error is that null reference analysis is not infallible and cannot easily take into account parallel or indirect references. ![]()
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The lower voltage of the standard hybrid’s battery means that it can’t drive as much power into the electric motors – the total system output drops 20bhp to 138bhp as a result – and the smaller capacity means that it covers shorter distances in zero-emission mode. However, in place of the bulky plug-in battery sits a more compact 1.2kWh unit. Like the current Clio E-Tech hybrid, the upcoming Captur hybrid is likely to share its 1.6-litre combustion engine, gearbox and electric motors with the PHEV. It’s priced from £31,495 and comes with 18-inch alloy wheels, a model-specific white insert for the dashboard, exclusive cloth upholstery with blue stitching and a range of copper and blue inserts for the car’s front bumper, front wing and C-pillar. However, the French brand also offers a more generously equipped Launch Edition variant, which features a handful of cosmetic tweaks. With the exception of some extra badges and a larger 10-inch instrument binnacle, Renault’s £30,995 E-Tech plug-in hybrid model shares the same basic equipment as the Captur S Edition. The cabin gets a lift too, with faux leather upholstery, an auto-dimming rear view mirror, a wireless smartphone charger, a larger 9.3 infotainment system and a seven-inch digital instrument binnacle in place of the standard car’s analogue unit. It builds on the Iconic’s specification with the company’s trademark C-shaped LED daytime running lights, a set of diamond-cut 17-inch alloy wheels, front and rear parking sensors, a blind-spot monitoring system and a shark-fin antenna mounted on the roof. Depending on the engine, five- or six-speed manual and seven-speed dual-clutch automatic gearboxes are offered.Renault’s flagship S Edition is priced from £22,095. A 1.5-litre diesel comes in 94bhp and 113bhp form. 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To continue that success, the new Seat Arona rival adopts an evolutionary approach to the exterior design that Renault describes as “more modern, more muscular and more expressive, with more SUV design cues”. The French maker claims to have sold more of the outgoing Captur last year than when it first launched in 2013. Just three specification grades will be offered at launch, with Iconic (from £19,095) and S Edition (from £20,595) specs rounding the range off. Other engines include dCi 95 and dCi 115 diesel engines, (From £19,395 and £21,695 respectively) plus a range-topping TCe 155 petrol (from £22,895). Stepping up to the TCe 130, which uses a 1.3-litre four-cylinder petrol engine, adds £2,800 - although in Play spec it’s auto-only, which explains the big price jump. ![]() New Gumpert RG Nathalie fuel cell EV – details and first ride.Renault plans new sister model to Captur crossover.Renault Captur 130 TCe Iconic 6-speed 2019 first drive.Nearly new buying guide: Renault Captur. ![]() ![]() The links to the Bach Minuet, easy Middle C arrangements:ĭownload the minuet arranged at Middle C for beginnersĭownload the Bach melody arranged for beginners with chord symbolsĭownload easy arrangement of Bach Minuet in Gĭownload page 1 of Minuet in G from Notebook for Anna Magdalena (not simplified)ĭownload complete free classical piano music Bach Minuet in G However, even today it is still quite unknown who composed this piece, partly because it was copied anonymously into the Notebook for Anna Magdalena Bach." "The Minuet in G major is a keyboard piece included in the Notebook for Anna Magdalena Bach and often attributed to Johann Sebastian Bach, but it is now usually attributed to Christian Petzold. The composers of still others, including several popular songs of the time, remain unknown. The authorship of several pieces is identified in the notebook itself, while that of others was established by researchers. Other composers contributed to the notebookĪlthough the 1725 notebook does contain work composed by Johann Sebastian Bach, it also includes works by many other composers. "Most of the entries in the 1725 notebook were made by Anna Magdalena herself, with others written in the hand of Johann Sebastian, some by sons Johann Christian and Carl Philipp Emanuel, and a few by family friends such as Johann Gottfried Bernhard and Johann Gottfried Heinrich. But it was probably not written by Johann Sebastian Bach at all! This famous piece is from the charming Notebook for Anna Magdalena Bach. Note that the final phrase has an altered left hand, to make it easier for beginners to play: Here is the first part of the Minuet - there are actually TWO pages (see below). Give your students past the beginning stages page one of this free classical piano music to start with the first version here has a much easier left hand part than the original. The elementary-level music, just a bit simplified Too intimidating.īut on their own, they will often start experimenting with the chords, and end up with a nice solo version. This happens a lot with my students, and it's funny, because if I STARTED them with the melody all in one hand, they would likely choose not to try this piece, and others. ![]() Use this sheet if you want to imitate the original harmonies in this piece for a little duet.Īdditionally, you can bet that one of your students, having mastered the melody, will figure out how to play the melody ALL IN ONE HAND, and then start adding chords! Please scroll down the page for the download links. ![]() |
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