add | 易学教程

Fragment replace() not replacing all fragments

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问题 If I call add() for fragments A and B with the same viewId and then try to call replace() on that viewId with fragment C, only fragment A is getting removed, ending up with fragments B and C. According to the docs, BOTH A and B should be replaced by C...or am I reading the docs wrong? Here's one combination that does this: public class FragmentActivity extends SherlockFragmentActivity { @Override public void onCreate(final Bundle savedInstanceState) { super.onCreate(savedInstanceState);

add_action function in wordpress

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问题 well im learning to create a wordpress plugin i downloaded one and read the codes, and i saw this i assume 'foo' is the tag where it will add action to.. but what does the array() exactly do? add_action('foo', array('foo1', 'foo2')); i looked at http://codex.wordpress.org/Function_Reference/add_action and there is no clear definition about it .. 回答1: Right, the first argument is the tag (to which you'll be adding the action), and the second argument specifies the function to call (i.e. your

Recursively add sequence of numbers

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问题 Hey im trying to refresh my mind with a bit of recursion. I want to add all numbers from 'start' to 'end' inclusive. I.e if start was 1, and end was 5. Then the answer would be 1+2+3+4+5 = 15 So far I've got this int calc(int start, int end){ if(start > end) return total; else{ total = total + start; return sum1(start++, end); } } Its not working (i get seg fault). What am i doing wrong? EDIT: Sorry i am using the same variables in my actual code, when i wrote this i ended up reffering to

About “5”-1 & “5”+1 in Javascript (plus and minus signs) [duplicate]

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问题 This question already has answers here : Why does JavaScript handle the plus and minus operators between strings and numbers differently? (7 answers) Closed 4 years ago . I read a book about operators in Javascript, and this confused me. console.log("5"+1); This would make "5" as a string. So the result would be 51 . console.log("5"-1); This result would be 4 . I know it converts "5" to 5 , but why it isn't shown undefined as "a string minus a number"? Update: So how about other languages?

Javascript Multidimensional Array: Add Values

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问题 So I have a multidimensional array like: myArr = [["venue",2],["venue",16],["inning",2],["inning",4],["inning",32],["hithard", 4]] I would like to add the similar values up. So in the end I just have: "venue" = 18, "inning" = 38, and "hithard" = 4. Can you give me an example of how to accomplish this? Either with Javascript and/or jQuery Thanks! 回答1: I am not sure if you want an array or object. If object, stop it is 1st pass and tmp in below code should return you the object as Object {

Adding multiple items at once to ArrayList in Java [duplicate]

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问题 This question already has answers here : Add multiple items to already initialized arraylist in java (6 answers) Closed 2 years ago . How can I add multiple items at once to an ArrayList? ArrayList<Integer> integerArrayList = new ArrayList(); Instead of: integerArrayList.add(1) integerArrayList.add(2) integerArrayList.add(3) integerArrayList.add(4) ... I would like to: integerArrayList.add(3, 1, 4, 2); So that I wont have to type so much. Is there a better way to do this? 回答1: Use Collections

How do I add a class without having it get rid of the others?

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问题 I have the following code set up in my footer which adds a class of 'day' during the time specified. function setTimeStyles() { var currentTime = new Date().getHours(); if(currentTime > 5 && currentTime < 17) { document.body.className = 'day'; } } $(document).ready(function() { setTimeStyles(); }); The problem is when the class gets added, it gets rid of the other classes already in place. For example, without the 'day' class added, my body tag would be: <body class="home"> But when the 'day'

How to handle adding elements and their parents using xpath

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问题 Ok, I have a case where I need to add a tag to a certain other tag given an xpath. Example xml: <?xml version="1.0" encoding="UTF-8"?> <Assets> <asset name="Adham"> <general>> <services> <land/> <refuel/> </services> </general> </asset> <asset name="Test"> <general> <Something/> </general> </asset> </Assets> I want to add a <missions> tag to both assets. However, the second asset is missing the parent <services> tag, which I want to add. Each asset tag is stored in a variable (say node1,

Swift - Insert object/item / Add object/item in NSArray

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问题 I have this code: var NToDel:NSArray = [] var addInNToDelArray = "Test1 \ Test2" How to add addInNToDelArray in NToDel:NSArray ? 回答1: You can't - NSArray is an immutable array, and as such once instantiated it cannot be changed. You should turn it into a NSMutableArray , and in that case it's as simple as: NToDel.addObject(addInNToDelArray) Alternatively, you can insert the value at instantiation time: var NToDel:NSMutableArray = [addInNToDelArray] but that's not about adding, it's about

How To Add An “a href” Link To A “div”?

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问题 I need to know how to add an a href link to a div? Do you put the a href tag arounf the entire "buttonOne" div? Or should it be around or inside the "linkedinB" div? Here's my HTML: <div id="buttonOne"> <div id="linkedinB"> <img src="img/linkedinB.png" width="40" height="40"> </div> </div> 回答1: Can't you surround it with an a tag? <a href="#"><div id="buttonOne"> <div id="linkedinB"> <img src="img/linkedinB.png" width="40" height="40"> </div> </div></a> 回答2: In this case, it doesn't matter as