I'm writing a ClojureScript / reagent program. But I don't seem to have the browser's "navigator" object available to me.
How do I get it?
OK. I was being stupid.
It's
js/navigator
Related
I usually use $x() function on Google Chrome development console. However, when XML file has a namespace the query does not work. I could not find any way to add the namespace. I was wondering if I am missing something or is a missing feature.
I don't know if there is a way to include namespaces in the function, but it's possible to (try to) avoid them altogether by using local-name().
For example, if your element is (picked randomly for an EDGAR filing):
<edgar:companyName>Federal Bank of Boston</edgar:companyName>
This expression
$x('//*[local-name()="companyName"]')
should select it.
I am after a plugin or technique in sublime text 3 to get what I will call the fully qualified path of the json element that is selected in the editor window.
Somethink like: http://jsonpath.com/
I want to get a result somewhere that I can copy, I just want to use this for documentation, not programmatically. It does not need to be the https://github.com/jayway/JsonPath standard, just something that produces a readable/meaningful path to an element.
For those who came here looking for ST3 implementation of jsonpath, there's an awesome Pretty JSON plugin.
It has jQ integration, which does the same same thing as jsonpath. jQ has different syntax, but it's much more convenient to have this functionality available inside ST3 than to switch to browser.
I was searching for the same and ended up creating a plugin myself: https://github.com/akirk/StatusBarJsonPath
I have an existing web UI that I would like to be able to call a function written in ClojureScript. The function would be in a separate ClojureScript module (cs_func.js file) that does not need access to the DOM. I can't find any examples on how to do this.
Yes, this is possible (cf. how to use a complex return object from clojurescript in javascript… for instance). As you already figured out, ClojureScript will be compiled to normal JavaScript files (where "normal" varies according to your cljsbuild settings on how aggressive the output will be optimized). This is more a Javascript question on how to access the compiled JavaScript module than anything else.
You should be aware, however, that the output from cljsbuild might get mingled and that you probably want to prohibit this for your entrypoints, cf. the discussion in the section "Exporting ClojureScript functions" in this article on ClojureScript/JavaScript interop and the even more detailed discussion in Luke VanderHarts article on using JavaScript and ClojureScript
I've been googling around for the past 2 hours looking for some simple instructions on how to add my own custom metadata tag in as3 with no success. I'm starting to think that I'm probably not searching for the correct terms.
The Problem
Ultimately, what I want to do is add a custom metadata on a function that takes a function as a parameter and makes sure that the given function has the correct parameters.
I.e. I have the following function:
public function testCallback(callback:Function):void
{
callback("test");
}
and I want to get a compiler error when I call it like this:
public function doNothing():void
{
// doing nothing
}
public function someRandomFunction():void
// ...
testCallback(doNothing);
}
The way I'm thinking of doing this is by having this metadata:
[Callback(paramName="callback",callbackParams="string")]
public function testCallback(callback:Function):void
{
callback("test");
}
The extension would run during compilation and, if the function passed does not contain the correct parameters, a compile-time error will be thrown. I THINK by using flex2.compiler.util.ThreadLocalToolkit.logError(path, line, errorMessage); I can accomplish this.
The Search
I've been googling for a couple of hours now and couldn't find a simple tutorial that could get me started. I found some SDK bug reports (SDK-18718, SDK-26041), an unfinished forum post, a tutorial (?) on how to add a custom metadata in FlexBuilder (I'm using FlashDevelop), a not-so-useful answer in StackOverflow and many many more dead ends.
The Help
So far, as far as I could understand, I will use Java to create the extension and then, using a compiler command, I'll add it into my project. However, I don't know what do I need to get started.
My two main questions are:
A) What do I need to create the extension in Java? (do I need Flex Builder? Eclipse? what libraries do I need in my classpath?)
B) Once I have compiled this into something (a swc?), how do I include this in FlashDevelop in my AS3 Project?
Thanks in advance!
Update
I've been able to create a Java project in eclipse, add the Flex libraries, implement the IMxmlcExtension interface and compile the project into a jar with the correct MANIFEST file. Unfortunately, adding the extra -extension=MyTest.jar in FlashDevelop, did nothing.
In case it is useful, the resulting command line for the compiler was
mxmlc -load-config+=obj\MyProject.xml -debug=true -incremental=true
-swf-version=10 -extension=flex_test.jar -o obj\MyProject634846490611881374
Update 2
Timofei Davydik helped me narrow down the problem. It seems that FlashDevelop is the main problem. Creating an extension and compiling it in command line works. I started a thread in FlashDeveloper's forums. In case you're interested, the thread is: -extension compiler option
Update 3
Pilippe is correct, it seems that the problem comes from the fact that FlashDevelop uses Flex Compiler SHell (fcsh). I am now looking into how can I switch compilers.
Really interesting question. I've done some research. Yes, we can write mxmlc extensions and add some custom functionality. But processing custom metadata is really complicated, and much time is needed debug and explore flex compiler sources. I've created a post in my blog about extensions, you can check it:
http://tim-davydik.blogspot.com/2012/09/flex-compiler-mxmlc-extensions-forcing.html
How to make meta-data tags work in Action Script
Timofei Davydik's wrote a quick and simple tutorial in his blog to answer my question, named Flex compiler mxmlc extensions. Forcing compiler language, and helped me a bunch to track down what is the problem (which is why I'm giving him the bounty). In his post, he is using Flash Builder and not FlashDevelop, which brings us to the answer of the next question:
How to program them using Flash Develop
Unfortunately, as Phillipe pointed out, for AS3 projects, FlashDevelop uses the Flex Compiler SHell (FCSH), which doesn't support meta-data. Since FlashDevelop is open-source, I'll try (and probably fail) to switch the compiler for testing purposes. For anybody else interested in this, I think this forum post is a good start: [ GIFT ] Try new AS3 compiler (ASC 2.0) in flashDevelop 4.x
I'm thoroughly confused about how to read/write into igraph's Python module. What I'm trying right now is:
g = igraph.read("football.gml")
g.write_svg("football.svg", g.layout_circle() )
I have a football.gml file, and this code runs and writes a file called football.svg. But when I try to open it using InkScape, I get an error message saying the file cannot be loaded. Is this the correct way to write the code? What could be going wrong?
The write_svg function is sort of deprecated; it was meant only as a quick hack to allow SVG exports from igraph even if you don't have the Cairo module for Python. It has not been maintained for a while so it could be the case that you hit a bug.
If you have the Cairo module for Python (on most Linux systems, you can simply install it from an appropriate package), you can simply do this:
igraph.plot(g, "football.svg", layout="circle")
This would use Cairo's SVG renderer, which is likely to generate the correct result. If you cannot install the Cairo module for Python for some reason, please file a bug report on https://bugs.launchpad.net/igraph so we can look into this.
(Even better, please file a bug report even if you managed to make it work using igraph.plot).
Couple years late, but maybe this will be helpful to somebody.
The write_svg function seems not to escape ampersands correctly. Texas A&M has an ampersand in its label -- InkScape is probably confused because it sees & rather than &. Just open football.svg in a text editor to fix that, and you should be golden!