Fairly new to node-webkit, so I'm still figuring out how everything works...
I have some logging in my app:
console.log("Name: %s", this.name);
It outputs to the browser console as expected:
Name: Foo
But in the invoking terminal, instead I get some fairly ugly output:
[7781:1115/085317:INFO:CONSOLE(43)] ""Name: %s" "Foo"", source: /file/path/to/test.js (43)
The numerical output within the brackets might be useful, but I don't know how to interpret it. The source info is fine. But I'd really like the printed string to be printf-style formatted, rather than shown as individual arguments.
So, is there a way to get stdout to be formatted either differently, or to call a custom output function of some sort so I can output the information I want?
I eventually gave up, and wrapped console.log() with:
log = function() {
console.log(util.format.apply(this, arguments));
}
The actual terminal console output is done via RenderFrameHostImpl::OnAddMessageToConsole in chromium, with the prefix info being generated via LogMessage::Init() in the format:
[pid:MMDD/HHMMSS:severity:filename(line)]
The javascript console.log is implemented in console.cc, via the Log() function. The printf style formatting is being done at a higher level, so that by the time the Log() function (or similar) are called, they are only passed a single string.
It's not a satisfying answer, but a tolerable workaround.
I was looking to create a command line interface to go along side my UI and had a similar problem. Along with not logging the values as I wanted I also wanted to get rid of the [pid:MMDD/HHMMSS:severity:filename(line)] output prefix so I added the following:
console.log = function (d) {
process.stdout.write(d + '\n');
};
so that console logging was set back to stdout without extra details. Unfortunately also a work around.
Related
I can't figure out how to get unbuffered input.
I tried:
method get-selection() {
getc();
}
Also tried Term::ReadKey module:
use Term::ReadKey;
method get-selection() {
read-key();
}
But I still have to hit enter before I can capture the input. Couldn't find anything in the docs that might help.
I'm on macOS.
https://docs.raku.org/type/IO::Handle#routine_getc states:
Using getc to get a single keypress from a terminal will only work properly if you've set the terminal to "unbuffered".
For MacOS, a Google search gets me to:
https://apple.stackexchange.com/questions/193138/to-install-unbuffer-in-osx
I want to implement a second code formatting. This formatting should be executable by an additional command.
I have already registered a DocumentFormattingEditProvider and that is fine.
vscode.languages.registerDocumentFormattingEditProvider({ language: 'sosse' }, {
provideDocumentFormattingEdits(document: vscode.TextDocument) {
return formattingAction(document);
},
});
But in my case I need a second formatting action for one-liners, which is executed by an command.
I thought about using:
vscode.commands.registerCommand(command, callback)
But I don't know how to access and change the document.
But I don't know how to access and change the document.
There's a special variant of registerCommand() that I think is exactly what you're looking for: registerTextEditorCommand(). From the API docs:
Text editor commands are different from ordinary commands as they only execute when there is an active editor when the command is called. Also, the command handler of an editor command has access to the active editor and to an edit-builder.
That means the callback gets passed an instance of a TextEditor as well as a TextEditorEdit.
I need to check if the user's device can input from a camera on my site. To do this I am attempting to use modernizr. I have followed the steps/example code provided on their site but when I test the capture attribute, I always get undefined, regardless of if I am on a device that supports capture.
Steps I followed:
I browsed for the input[capture] attribute and added it to the build
I copied the demo code to check this feature and added it to my project
I downloaded the build, added the js file to my project, and included the appropriate reference in my page
However after all of this, when inspecting Modernizr.capture in the chrome inspector, it always shows up as undefined.
My basic check function is as follows:
$scope.hasCamera = function() {
if (Modernizr.capture) {
// supported
return true;
} else {
// not-supported
return false;
}
}
This is my first time using Modernizr. Am I missing a step or doing something incorrectly? I also installed modernizr using npm install and tried adding the reference to a json config file from the command line.
Alternatively, how might I check if my device has a camera?
Thank you very much for your time. Please let me know if I am being unclear or if you need any additional information from me.
A few things
while photos are helpful, actual code hosted in a public website (either your own project, or on something like jsbin.com) is 10x as useful. As a result, I am not sure why it is coming back as undefined.
The actual capture detect is quite simple. It all comes down to this
var capture = 'capture' in document.createElement('input')`
Your code is a lot more complicated than it needs to be. Lets break it down. You trying to set $scope.hasCamera to equal the result of Modernizr.capture, and you are using a function to check the value of Modernizr.capture, and if it is true, return true. If it is false, return false. There is a fair bit of duplicated logic, so we can break it down from the inside out.
Firstly, your testing for a true/false value, and then returning the same value. That means you could simplify the code by just returning the value of Modernizr.capture
$scope.hasCamera = function() {
return Modernizr.capture
}
While Modernizr will always be giving you a boolean value (when it is functioning - without seeing your actual code I can't say why it is coming back as undefined), if you are unsure of the value you can add !! before it to coerce it into a boolean. In your case, it would make undefined into false
$scope.hasCamera = function() {
return !!Modernizr.capture
}
At this point, you can see that we are setting up a function just to return a static value. That means we can just set assign that static value directly to the variable rather than setting up a function to do that
$scope.hasCamera = !!Modernizr.capture
Now, the final thing you may be able to do something better is if you are only using Modernizr for this one feature. Since it is such a simple feature detection, it is overkill to be using all of Modernizr.
$scope.hasCamera = 'capture' in document.createElement('input')`
Using Apache velocity in xwiki, how do I create a console.log() like one would in JavaScript? I know the log will probably be server side. I really just want to print the values of variables as it is rendered for debugging purposes.
I should add that the page I'm trying to debug is a form .post page, thus not rendered by its self, only returns data. Thus {{velocity output="false"}} mode, so simply printing the variable is not an option.
Since XWiki 6.1 you can use logging script service to get a standard logger:
$services.logging.getLogger('My script').info('Hello {}', 'world')
See http://extensions.xwiki.org/xwiki/bin/view/Extension/Logging+Module#HGetaLoggerfromscript for more details.
I had trouble to figure out what's the value for 'My Script'. Turns out the function getLogger() will take a logger_name as input parameter, where logger_name can be any of the logger name in ..WEB-INF/classes/logback.xml.
For example, this works for me: $services.logging.getLogger('org.xwiki').info('Hello {}', 'world')
We are not able to call balanced.card.create from a Phonegap application. This is reproduced in a stock Phonegap application here: https://github.com/kevg/phonegap-balanced. Full details are in the README.md on github, but the basic summary is:
For those not familiar with phonegap, the main page that loads is
index.html. This initializes phonegap in index.js. When the device is
ready, we will show a hidden DIV with a button named "Execute
Balanced." When you click this button, app.executeBalanced in index.js
will be called which prompts for the balanced marketplace URI, loads
balanced.js with $.getScript, and then calls balanced.card.create with
a test credit card.
The expected result is that callbackHandler is called or an exception
is caught. Instead, it seems the execution of the Javascript thread
disappears into balanced.card.create, never to return and without any
error.
Alrighty, I found the bug in balanced.js. So, in Phonegap, window.location.href returns something like file:///.../index.html. Balanced.js creates an iframe to something like https://js.balancedpayments.com/proxy#file
var src = proxy + "#" + encodeURIComponent(window.location.href);
https://github.com/balanced/balanced-js/blob/master/src/utils.js#L48
In the script returned in proxy.html (which I can't find on github), it does:
c.parentURL=decodeURIComponent(
window.location.hash.replace(/^#/,"")
).replace(/#.*$/,"")
c.parentDomain=c.parentURL.replace(/([^:]+:\/\/[^\/]+).*/,"$1")
The regex doesn't match because file: has three slashes. Now, at first, I thought I could just convert the regex to:
/([^:]+:\/+[^\/]+).*/
However, then there's another problem, because balanced does a security origin check on the match:
if (d.origin.toLowerCase() !== c.toLowerCase()) return !1;
However, the regex returns file:///firstcomponent, whereas event.origin does not include a host name for the file scheme, so these won't match even with a fixed regex.
I can't change anything in the script returned in the proxy response because if I load that from a domain other than balancedpayments.com, then the AJAX POST fails (return code 0 with a blank body). Therefore, the only thing I can control is the hash passed to the iframe.
However, since this regex is a replace, we can simply pass exactly what we know we need (we don't care that the regex is a no-op).
Therefore, the solution is to change L48 above to:
var src = proxy + "#" + encodeURIComponent("file://");
This works.