Seems even in the grim darkness of the 41st millennium , this joke still happens. Discworld : Equal Rites references this, saying that magic has a habit of lying low, like a rake in the grass. Toys, strollers, garden tools Live-Action TV. Happens to the Skipper on the Gilligan's Island episode "Waiting for Watubi"; the "rake" was made of bamboo and coconuts.
Happens to Jack a couple of times on Three's Company. On Ways to Die , one young woman who gardened as a hobby died of suffocation by stepping on a rake with a zucchini in her mouth as she prepared for a date. In an episode of Mystery Hunters , Doubting Dave hits himself with a rake a few times when discussing about fairies. It rose in offense And struck me a blow In the seat of my sense Video Games. Teenage Mutant Ninja Turtles: Turtles in Time has loose planks on the pirate ship level that smack the player character whenever they step on them.
It's the same gag. Plants vs. Zombies allows you to buy a rake for your lawn that kills the first zombie that it encounters; it lasts three levels, after which you can buy a new one. In some levels, enemies can attack you while the rake has incapacitated you. One of the rake-type traps is present in Runescape in Isafdar forest.
However, this trap has something else than just a stick at the end of the rake. Pepsiman has shovels that Pepsiman can step on and get smacked in the face by. In Delicious 9: Emily's Honeymoon Cruise the title character has a fight with her husband while on a Greek beach and after she storms off he steps on a rake and gets knocked out. Stepping on a rake is a minor hazard in Sunsetriders that causes comical effects a big vertical indention on the face for Billy, Steve and Bob, while Cormano ends up taking a shot to the junk.
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In Skylanders: SuperChargers , Cloudbreather's Crag has rakes that will hit your Skylander if they step on them, though otherwise they're harmless. Outside of the level, you can buy one as a Legendary Treasure for use at Skylanders Academy. Lakeview Cabin Collection feature rakes in Part III that the players can step on, being whacked with enough force to knock them off their feet.
Which can also be weaponized against the killers. In Hitman 2 , you can set this up in the Whittleton Creek level by placing rakes down on the ground. When using dependencies for grouping a common part of structuring build files it seemed to make sense to put the dependency by the pre-requisite task.
I don't actually have to define the :errata task with a task keyword, just putting it as a dependency for :main is enough to define the task. I can then add individual errata files later on and add each to the group task.
For this kind of group behavior this seems a reasonable way to go although I don't actually do it quite like this in my build file, as we'll see later. One question that this raises is 'how do we find all the dependencies when they are spread out all over the build file? Allowing you to add dependencies after you've defined a task, together with having full ruby available to you, introduces some further tricks to the build. Before I explain about synthesized tasks, however, I need to introduce some important principles about build processes.
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Build scripts tend to have to do two kinds of build - clean builds and incremental builds. A clean build occurs when your output area is empty, in this case you build everything from its version controlled sources. This is the most important thing the build file can do and the number one priority is to have a correct clean build. Clean builds are important, but they do take time. So often it's useful to do incremental builds.
Here you already have stuff in your output directories. An incremental build needs to figure out how to get your output directories up to date with the latest sources with the minimal amount of work. There are two errors that can occur here. First and most serious is a missing rebuild - meaning that some items that should have got built didn't. That's very bad because it results in output that doesn't really match the input in particular the result of a clean build on the input.
The lesser error is an unnecessary rebuild - this builds an output element that didn't need to be built. This is a less serious error as it's not a correctness error, but it is a problem because it adds time to the incremental build. As well as time it adds confusion - when I run my rake script I expect to see only things that have changed get built, otherwise I wonder "why did that change? Much of the point of arranging a good dependency structure is to ensure that incremental builds work well.
I want to do an incremental build of my site just by going 'rake' - invoking the default task. I want that to build only what I want to. So that's my need, an interesting problem is to get that to work for my bliki. The sources for my bliki is a whole bunch of xml files in my bliki directory. The output is one output file for each entry, plus several summary pages - of which the main bliki page is the most important.
What I need is for any change to a source file to re-trigger the bliki build. But clearly this would be dreadfully tedious, and just asking for me to forget to add a new file to the list when I want to add one.
step on a rake - definition - English
Fortunately I can do it this way. FileList is part of rake, it will generate lists of files based on the glob that's passed in - here it creates a list of all the files in the bliki source directory. The each method is an internal iterator that allows me to loop through them and add each one as a dependent to the file task. The each method is a collection closure method.
Homemade Pond Rake (Super Easy Using Common Household Supplies)
I do this so I can just build the bliki alone with rake bliki. I'm not sure I really need this any more. If all the dependencies are set up properly as they are now I can just do a default rake and there's no unnecessary rebuild. But I've kept it in for the moment. The desc method allows you to define a short description to the following task, this way when I run rake -T I get a list of any tasks with a desc defined for them.
This is a useful way of seeing what targets are available to me. If you've used make before, you may be thinking that this is reminiscent of one of make's greatest features - the ability to specify pattern rules to automatically make certain kinds of file. The common example is that you want build any foo. And indeed you don't even need this in your make file as make comes packaged with many pattern rules like this. Rake actually has a similar mechanism. I'm not going to talk about it, other than to mention it exists, because I haven't yet found I needed it.
Synthesizing tasks worked for all I needed. One of the problems I found with using file names and dependencies is that you have to repeat the file names. Take this example. I can avoid repeating in the action block by using the task object, but I have to repeat it to set up the dependency to the overall articles task. I don't like that repetition because it's asking for trouble if I change my file name.
I need a way to define it once. I could just declare a constant, but then I'm declaring a constant that's visible everywhere in my rakefile when I'm only using it in this section. I like variable scopes to be as small as possible. I can deal with this by using the FileList class that I mentioned above, but this time I use it with only a single file.
This way I define src and target variables that are only scoped within this block of code. Notice that this only helps me if I define the dependency from the :articles task here. If I want to define the dependency in the definition of the :articles task, I would need a constant so I get the visibility across the whole rakefile. When Jim Weirich read a draft of this he pointed out that if you find the FileList statement too wordy, you can easily define a method specifically to do this:.
One of the really great things about having a build language be an internal DSL to a full programming language is that I can write routines to handle common cases. Sub-routines are one of the most elementary ways of structuring a program, and the lack of convenient sub-routine mechanisms is one of the great problems of ant and make - particularly as you get more complex builds. All my newer writing uses ruby to do this translation, but I have a lot of older XSLT stuff around and I don't see any rush to change it. After writing various tasks to process XSLT I soon saw that there was some duplication, so I defined a routine for the job.
The first two lines figure out the target directory and the target file. Then I add the target file as a dependent to the supplied task symbol. Then I create a new file task with instructions to create the target directory if needed and use my XmlTool to carry out the XSLT transform. This method nicely encapsulates all the common code and parametrizes the variables for my needs at the moment.
I found it really helpful to pass in the parent group task into the routine so that the routine would easily build the dependency for me - another advantage of the flexible way of specifying dependencies. I have a similar common task for copying files directly from source to the build directories, which I use for images, pdfs etc. The copyTask is a bit more sophisticated because it allows me to specify a glob of files to copy, this allows me to copy stuff like this:.
This copies all gif files in the articles sub-directory of my sources into the articles directory of my build directory. It makes a separate file task for each one and makes them all dependents of the :articles task. Of course they are different processors and I need to invoke them differently - but of course I want this to be hidden to the rakefile and certainly to me when I invoke rake.
Here again is the nice thing about having a full blown language to work with directly. I can easily write an Xml processor that uses platform information to do the right thing. In ruby you create an object by calling the new method on the class. The great thing about this, as opposed to tyrannical constructors, is that you can override this new method - even to the point of returning an object of a different class. So in this case when I invoke XmlTool. For unix each one invokes a command line call. Indeed you can insert the result of any ruby expression in there - which is really handy.
In the validate method I use back-quotes - which execute the command line and return the result.
Who Uses Rake?
The puts command is ruby's way of printing to standard output. The windows version is a bit more complex as it needs to use COM rather than the command line. The statement require 'win32ole' pulls in ruby library code for working with windows COM. Notice that this is a regular part of the program; in ruby you can set things up so that libraries are only loaded if needed and present.
I can then manipulate the COM objects just as with any other scripting language. You'll notice there's no type relationship between these three XML processing classes. The xml manipulations work because both the windows and unix XmlTools implement the transform and validate methods. This is what rubyists refer to as duck typing - if it walks like a duck and quacks like a duck then it must be a duck.
There's no compile time checking to ensure these methods are present. If a method is incorrect it will fail at run time - which should be flushed out by testing. I won't bother going into the whole dynamic vs static type checking debate, just point out that this is an example of the use of duck typing. If you are using a unix system, you may need to use whatever package management system you have to find and download the unix xml commands I'm using on the Mac I used Fink.
The one thing you can guarantee about programming is that stuff always goes wrong. However much you try there's always some mismatch between what you think you said and what the computer hears. Take a look at this bit of rake code simplified from something that actually did happen to me. See the bug? Neither did I. I couldn't figure out why. The timestamps on both files were correct even if I made damn sure the target was later than the source I'd still get a rebuild. My first line of investigation was to use rake's trace capability rake --trace. Usually it's all I need to identify strange invocations, but this time it didn't help at all.
At this point one might be inclined to blame Jim for the lack of debug tools. Perhaps cursing might at least make me feel better: "your mother is a she wolf from Cleveland and your father is piece of wet carrot". But I have a better alternative.
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Rake is ruby and tasks are just objects. I can get a reference to these objects and interrogate them. Jim may not have put this debug code into rake, but I can just as easily add it myself. Here's some code to see what all this should be. If you're not a rubyist you may find it odd to see I've actually added a method to the task class that's part of rake.
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This kind of thing, the same thing as an aspect-oriented introduction, is quite legal in ruby. Like many ruby things you can imagine chaos with this feature, but as long as you are careful it's really nice. At first I wondered about the timestamp. The timestamp on the output file was , so why did the task say ?
Then I realized the class of the task was Task not FileTask. Task's don't do date checking, if you invoke them they will always run. So I tried this. The change is that I declared the task as a file task before I mention it in the context of other tasks later. That did the trick. The lesson from this is that with this kind of internal DSL you have the ability to interrogate the object structure to figure out what's going on. This can be really handy when weird stuff like this happens. I used this approach in another case where I had unnecessary builds - it was really useful to pop the hood and see exactly what was happening.
By the way my investigation method breaks if the output file doesn't exist yet, such as in a clean build. I haven't spent any effort to fix it because I only needed it when the file was already there. Categories :. Level 2 Trap Gag. Accuracy :. Preceded by: Banana Peel. Succeeded by: Marbles. Miscellaneous Media files. Deployment Activation.
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