extend | 易学教程

What might be a reason of overriding function using jQuery.extend?

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问题 I was searching for a proper way of extending bootstrap plugin, and found this answer: https://stackoverflow.com/a/12689534/1276032 What troubles me, is the last section - initialization overriding. Copied code below: // override the old initialization with the new constructor $.fn.modal = $.extend(function(option) { var args = $.makeArray(arguments), option = args.shift(); return this.each(function() { var $this = $(this); var data = $this.data('modal'), options = $.extend({}, _super

Can you extend the val() function in jQuery?

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问题 Is there a way to extend the val() function in jQuery. Basically, what I want to do is set a class variable if there is content being dynamically entered into an input. Whick normally would be something like var thisVal = 'Hello World'; $('#myInput').val(thisVal).addClass('dark'); It would just be nice to tell the val() function to always add the class 'dark' to an input if there is a value, and to remove it if it is empty. Possible? 回答1: Try $.fn.xval = function () { return this.toggleClass

How to extend an array in Java without changing its name

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问题 I wonder if it's possible to extend an array in Java but without changing its name, since I have multiple methods linked to this array. I was thinking of creating a new array with the same name but twice as big, and then copy all elements from the first array to the second. Is this possible? Basically I want to make an array with accounts at a bank, and if the customer creates so many accounds that the array doesn't have enough elements, it should extend itself. Thank you for any replies! 回答1

jquery plugin $.extend

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问题 if i extend the jquery fn (like $.fn.extend) i write my plugin: (function($){ $.fn.extend({ functionName : function(){ //function returns return this.each(function(){ $(this).append("<div>text</div>"); }); } }); })(jQuery); when i want to extend jQuery namespace i write it like this: (function($){ $.extend({ functionName : function(){ //function returns } }); })(jQuery); what i don't know is how to write the 'return' in this case 回答1: UPDATE When you are doing multiple operations involving

I want to add my own methods to a few Dart Classes

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问题 My attempt to simply 'Extend' the Map class fails because List is an interface and cannot be extended but must be implemented. The goal was simply to add a few methods on top of some existing class such as: List.add_unique(item) where I only want to append if the item does not already exist. This can be done nicely by and-ing the append !=null logic with List.indexOf(item) != -1 (where -1 is notFound). This would be a good and easy to understand example? But, how to accomplish this in the

Can I extend actor in use case? [closed]

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问题 It's difficult to tell what is being asked here. This question is ambiguous, vague, incomplete, overly broad, or rhetorical and cannot be reasonably answered in its current form. For help clarifying this question so that it can be reopened, visit the help center. Closed 7 years ago . Can I extend actor in use case? for example I have "normal user" , "student user" and "teacher user"... every use case the "normal user" uses it ,by default the "student user" and "teacher user" use it too.. so

Python adding extra area to image

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问题 So I have a table with image sizes. There are multiple images of different sizes (66x66, 400x400, etc.). I have one example of image (the original) that always has a size of 600x532, and on this image is a product (a TV, a PC, etc.). I have to resize this image, which isn't a problem. But if I do this with proportion I get something like 66x55. If I don't do this with proportion the image doesn't look good. So the background of the original is always white. Is there a way to extend the area

Re-Inventing The Label Control

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问题 I need to reinvent/recreate the Label Control from scratch to add my own mojoness to it. Yes, I know what you're thinking (and if you're not thinking that, shouldn't you be?). Can somebody point me in the right direction? Thank you. The whole purpose for recreating the label is that I want full control over how it is drawn onto screen, and so that I can have KeyDown Event Handlers for it, too. For example, the user can edit the contents of a label the same way they would edit the contents of

jquery plugin $.extend

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if i extend the jquery fn (like $.fn.extend) i write my plugin: (function($){ $.fn.extend({ functionName : function(){ //function returns return this.each(function(){ $(this).append("<div>text</div>"); }); } }); })(jQuery); when i want to extend jQuery namespace i write it like this: (function($){ $.extend({ functionName : function(){ //function returns } }); })(jQuery); what i don't know is how to write the 'return' in this case UPDATE When you are doing multiple operations involving more than one selector, you have to decide what makes the most sense. If one selector is the primary focus,

Can I extend actor in use case? [closed]

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It's difficult to tell what is being asked here. This question is ambiguous, vague, incomplete, overly broad, or rhetorical and cannot be reasonably answered in its current form. For help clarifying this question so that it can be reopened, visit the help center . Closed 7 years ago . Can I extend actor in use case? for example I have "normal user" , "student user" and "teacher user"... every use case the "normal user" uses it ,by default the "student user" and "teacher user" use it too.. so can I extend "normal user" for "student user" and "teacher user" ? is that popular ? Thanks a lot :)