I'm developing a web application with Go on the server, and the router will use PushState, so the server will also have to be able to render my templates. That means that I'll need a templating engine that works with Go and Javascript. The only one I've come across so far is Mustache, but it doesn't seem to be able to handle lowercase properties of structs, and there also doesn't seem to be a possibility to provide custom names like JSON:
type Person struct {
Name string `json:"name"`
Age int `json:"age"`
}
So, is there a templating engine that is available in both Go and JavaScript, and that can handle lowercase struct properties?
As the comments above state, you can't expect any 3rd party library to be able to read lowercase properties on your struct, but it appears you are trying to use tags to represent alternative representations of your struct (as you can with the encoding/json library).
What you can do is use something like github.com/fatih/structs to convert your structs to maps and then range through to lowercase all of your keys (copying the values and removing the uppercase versions) and pass it into mustache.Render() as your context. If you want to use struct tags like the encoding/json library does, you'd have to use the reflect package and write a struct-to-map function that takes into account the tags on the struct (basic example given in the documentation here). There are some SO answers on how to write a struct-to-map function using reflection, which you can improve upon to add struct tag handling as you need.
To answer your question, I don't think this is something a current templating library does that also works with javascript, but it shouldn't be too hard to get working with mustache given the idea above.
Related
I have a question about how to approach a certain scenario before I get halfway through it and figure out it was not the best option.
I work for a large company that has a team that creates tools for the team mates to use that aren’t official enterprise tools. We have no access to the database directly, just access to an internal server to store our files to run and be able to access the main site with javascript etc (same domain).
What I am working on is a tool that has a ton of options in it that allow you to select that I will call “data points” on a page.
There are things like “Account status, Balance, Name, Phone number, email etc” and have it save those to an excel sheet.
So you input account numbers, choose what you need and then using IE Objects it navigates to the page and scrapes data you request.
My question is as follows..
I want to make the scraping part pretty Dynamic in the way it works. I want to be able to add new datapoints on the fly.
My goal or idea is so store the regular expression needed to get the specific piece of data in the table with the “data point option”.
If I choose “Name” it knows the expression for name in the database to run again the DOM.
What would be the best way about creating that type of function in Javascript / Jquery?
I need to pass a Regex to a function, have it run against the DOM and then return the result.
I have a feeling that there will be things that require more than 1 step to get the information etc.
I am just trying to think of the best way to approach it without having to hardcode 200+ expressions into the file as the page may get updated and need to be changed.
Any ideas?
IRobotSoft scraper may be the tool you are looking for. Check this forum and see if questions are similar to what you are doing: http://irobotsoft.org/bb/YaBB.pl?board=newcomer. It is free.
What it uses is not regular expression but a language called HTQL, which may be more suitable for extracting web pages. It also supports regular expression, but not as the main language.
It organizes all your actions well with a visual interface, so you can dynamically compose actions or tasks for changing needs.
I am just a newcomer developing an app with html/css/js via phonegap. I've been searching info on how to make my app be displayed in different languages and Google doesn't understand me.
So the idea is to have a button on index.html that let the user choose the language in which the app will be displayed, in this case Spanish/English, nothing strange like arabic blablabla....
So I guess that the solution must be related to transform all the text that I load in html to variables and then depending on the language selected display the correct one. I have no idea how to make this, and Im not able to find examples. So that's what Im asking for... if someone could give some code snipet to see how html variables works and how should I save user language selection...
Appreciated guys!
This can be done by internationalization (such as i18N). To do this you need separate file for each language and put all your text in it. Search Google for internationalization.
Otherwise you can look into embeding Google Translate.
This depends on the complexity of language-dependencies in the application. If you have just a handful of short texts in a strongly graphic application, you can just store the texts in JavaScript variables or, better, in properties of an object, with one object per language.
But if you expect to encounter deeper language-dependencies as well (e.g., displaying dynamically computed decimal numbers, which should be e.g. 1.5 in English and 1,5 in Spanish), then it’s probably better to use a library like Globalize.js (described in some detail in my book Going Global with JavaScript and Globalize.js). That way you could use a unified approach, writing e.g. a string using Globalize.localize('greeting') and a number using Globalize.format(x, 'n1') and a date using Globalize.format(date, 'MMM d').
I have to make a invite your facebook friends module which fetches the names, photos of your friends and allows you to message 'em. I need this to look like a integral part of my website so I have to style it. I fetch the json with friends' ids, names etc. and want to put those values in certain html tags and attributes. How do I apporach this? I can make it in jQuery but want to avoid jQuery spaghetti code with ragu of strings and vars. What lib/template engine do you recommend me? Ease of use and weight are the most important things. The website has jQuery already included.
I can make it in jQuery but want to avoid jQuery spaghetti code with ragu of strings and vars. What lib/template engine do you recommend me?
I’d suggest to use no big additional lib or template engine – I’d just keep using jQuery, and embed one of the sprintf for jQuery implementations that are floating around the net.
So you can define your “HTML template” for your output in one location as one string, and than replace placeholders in that string with variable values while your looping over the data in jQuery.
If you don’t like any of the sprintf-Jquery-plugins out there, here is another very simple and short function that implements just the basic string placeholder %s (but more than that you most likely won’t need anyway): http://www.nczonline.net/blog/2011/10/11/simple-maintainable-templating-with-javascript/.
(And if you have to insert values in multiple places of your template string, than have a look at my comment on the bottom of that page, where if have proposed a simple adjustment to Nicolas’ function, that implements the “argument swapping” feature of PHP’s sprintf, so that you have to pass values to the function only once, but can use them in multiple places in your template string.)
The easiest way to do this is to use the Requests dialog. The first thing you need to do is create an app. Once you have this you should be able to use the JavaScript example on the request dialog page.
I have read a lot about parsing JSON with Actionscript. Originally it was said to use this library. http://code.google.com/p/as3corelib/ but it seems Flash Player 11 has native support for it now.
My problem is that I cannot find examples or help that takes you from beginning to end of the process. Everything I have read seems to start in the middle. I have no real experience with JSON so this is a problem. I don't even know how to point ActionScript to the JSON file it needs to read.
I have a project with a tight deadline that requires me to read twitter through JSON. I need to get the three most recent tweets, along with the user who posted it, their twitter name and the time those tweets were posted.
The back end to this is already set up I believe by the development team here, therefor my JSON files or XML just needs to be pointed to and then I need to display the values in the interface text boxes I have already designed and created.
Any help will be greatly appreciated...I do know that there are a lot of threads on here I just do not understand them as they all have some understanding of it to begin with.
You need to:
Load the data, whatever it is.
Parse the data from a particular format.
For this you would normally:
Use URLLoader class to load any data. (Just go to the language reference and look into example of how to use this class).
Use whatever parser to parse the particular format that you need. http://help.adobe.com/en_US/FlashPlatform/beta/reference/actionscript/3/JSON.html this is the reference to JSON API, it also shows usage examples. I'm not aware of these API being in production version of the player, still there might be quite a bit of FP 10.X players out there, so I'd have a fallback JSON parser, but I would recommend using this library: http://www.blooddy.by/en/crypto/ over as3corelib because it is faster. The built-in API are no different from those you would find in browser, so if you look up JSON JavaScript entries, the use should be in general similar to Flash.
After you parse JSON format, you will end up with a number of objects of the following types: Object, Array, Boolean, Number, String. It has also literals to mean null and undefined. Basically, you will be working with native to Flash data structures, you only should take extra care because they will be dynamically constructed, meaning you may not make assumption about existence of parts of the data - you must always check the availability.
wvxvw's answer is good, but I think skips over a to be desired explanation of what JSON itself is. JSON is plain text, javascript object notation, when you read the text on screen it looks something like this
http://www.json.org/example.html
you can see a side by side JSON and XML (both plain text formats) essentially JSON is a bunch of name value pairs.
When you use JSON.parse("your JSON string goes here") it will do the conversions to AS3 "dynamic objects" which are just plain objects (whose properties can be assigned without previously being defined, hence dynamic). But to make a long story short, take the example you see in the link above, copy and paste the JSON as a string variable in AS3, use
var str:String = '{"glossary": {"title": "example glossary","GlossDiv": {"title": "S","GlossList": {"GlossEntry": {"ID": "SGML","SortAs": "SGML","GlossTerm": "Standard Generalized Markup Language","Acronym": "SGML","Abbrev": "ISO 8879:1986","GlossDef": {"para": "A meta-markup language, used to create markup languages such as DocBook.","GlossSeeAlso": ["GML", "XML"]},"GlossSee": "markup"}}}}}';
var test:Object = JSON.parse(str);
method on the string, store it in a variable and use the debugger to see what the resulting object is. As far as I know there's really nothing else to JSON it's simply this format for storing data (you can't use E4X on it since it's not XML based and because of that it's slightly more concise than XML, no closing tags, but in my opionion slightly less readable... but is valid javascript). For a nice break-down of the performance gains/losses between AMF, JSON and XML check out this page: http://www.jamesward.com/census2/ Though many times you don't have a choice with regard to the delivery message format or protocol being used if you're not building the service, it's good to understand what the performance costs of them are.
We need to be able to localize strings in javascript - thinking for things like the app_offline.htm file etc.
jquery globalize is hectic and seems like total overkill. Is there a simple jquery plugin or anything really that will allow us to localize js strings?
At the risk of over simplifying:
var globals = {
en-US: {
color:'color',
cell:'cell phone'
},
en-GB: {
color: 'colour',
cell: 'mobile phone'
}
};
To use:
text = globals[lang].color;
where lang = 'en-US' etc
You can either generate that structure on the server and use resource files etc there, or just keep this object literal in a global.js or similar.
The Globalize.js library, previously known as jquery-global or jQuery Globalize, is relatively small, but if you only need string localization (and not date and number localization as well), then it does not offer much more than a general setup: locale (culture) object containing the property messages. It is initialized to an empty object, and you are supposed to add properties to it, corresponding to your strings to be localized. And it has the simple method Globalize.localize() that selects a localized string for a key
To implement simple string localization, you do not necessarily need any library or plugin. You could just code some simple approach like that of Globalize.js; the general code is fairly simple, much less work than defining the actual localizations for each string. On the other hand, if you have localization needs, you might just as well use Globalize.js, preparing for other kinds of localization in the future.