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javascript - Getting value of select (dropdown) before change

The thing I want to achieve is whenever the <select> dropdown is changed I want the value of the dropdown ... select are inserted after page load through ajax. Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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javascript - Is it possible to listen to a "style change" event?

Is it possible to create an event listener in jQuery that can be bound to any style changes? For example, if I want to "do" ... 100); $('p').css('color','red'); Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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objective c - didReceiveRemoteNotification not called, iOS 10

In iOS 9.3, the didReceiveRemoteNotification method gets called on both of the following occasions. 1) When the push ... should be the fix for this? Any idea? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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javascript - How does AJAX work?

What is the essence of AJAX? For example, I want to have a link on my page such that when a user clicks ... database (to remember that user likes the message). Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c++ - Why cast unused return values to void?

int fn(); void whatever() { (void) fn(); } Is there any reason for casting an unused return value to void, or ... eat my words if a bug escapes because of it... Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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serialization - How do you serialize an object in C++?

I have a small hierarchy of objects that I need to serialize and transmit via a socket connection. I need ... an object. I can handle the socket transmission. Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Gson TypeToken with dynamic ArrayList item type

I have this code: Type typeOfObjectsList = new TypeToken<ArrayList<myClass>>() {}.getType(); List<myClass> objectsList = ... representation: {....my json....} Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - Add a prefix to all Flask routes

I have a prefix that I want to add to every route. Right now I add a constant to the route at every ... about_page(): return "This is a website about burritos" Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c - What is the difference between prefix and postfix operators?

The following code prints a value of 9. Why? Here return(i++) will return a value of 11 and due to --i the value should ... } int fun (int i) { return(i++); } Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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What does @hide mean in the Android source code?

For the Activity source code, line 3898 (close to the bottom): /** * @hide */ public final boolean isResumed() { ... (). Is this normal? How can I access it? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - How does swapping of members in tuples (a,b)=(b,a) work internally?

In [55]: a = 5 In [56]: b = 6 In [57]: (a, b) = (b, a) In [58]: a Out[58]: 6 In ... values of a and b work internally? Its definitely not using a temp variable. Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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javascript - Only detect click event on pseudo-element

Please see this fiddle: http://jsfiddle.net/ZWw3Z/5/ My code is: p { position: relative; background-color: blue ... fringilla vel, aliquet nec, vulputate...</p> Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - Formatting floats without trailing zeros

How can I format a float so that it doesn't contain trailing zeros? In other words, I want the resulting string to be as short ... 14 -> "3.14" 3.140 -> "3.14" Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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filesystemobject - Loop Through All Subfolders Using VBA

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asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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r - Predict() - Maybe I'm not understanding it

I posted earlier today about an error I was getting with using the predict function. I was able to get that ... in my code. Help would be appreciated. Thanks Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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671 views

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sql server - Column "invalid in the select list because it is not contained in either an aggregate function or the GROUP BY clause"

I would like to display the column B in my below SQL, but when I add it to the query it gives me the following error: ... as T1, B FROM T2 WHERE ID=1 GROUP BY A Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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jquery - How can I show only corner borders?

I'm wondering if it's possible in CSS or jQuery to make a border but only for corner. Something like this: **** **** * * * * CONTENT * * * * **** **** Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python: changes to my copy variable affect the original variable

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asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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batch file - What are the ERRORLEVEL values set by internal cmd.exe commands?

The ERRORLEVEL is a value returned by most cmd.exe commands when they end that change depending on a series of ... the ERRORLEVEL to any value (including zero)? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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Behavior of exec function in Python 2 and Python 3

Following code gives different output in Python2 and in Python3: from sys import version print(version) def execute(a, st) ... b']. What is wrong in my example? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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537 views

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java.lang.ClassNotFoundException when running in IntelliJ IDEA

I creating a program to work with databases and I am getting the following error when compiling in IntelliJ IDEA. ... is happening and how I could solve it? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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277 views

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c - Strange behaviour of the pow function

While running the following lines of code: int i,a; for(i=0;i<=4;i++) { a=pow(10,i); printf("%d",a); ... value of a comes out to be 100. How is that possible? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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assembly - Why doesn't GCC optimize a*a*a*a*a*a to (a*a*a)*(a*a*a)?

I am doing some numerical optimization on a scientific application. One thing I noticed is that GCC will ... do compilers not recognize this optimization trick? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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205 views

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git branch - Why does git perform fast-forward merges by default?

Coming from mercurial, I use branches to organize features. Naturally, I want to see this work-flow in my history as ... the default. What's so good about it? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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javascript - jQuery's jquery-1.10.2.min.map is triggering a 404 (Not Found)

I'm seeing error messages about a file, min.map, being not found: GET jQuery's jquery-1.10.2.min.map ... 404 (Not Found) Screenshot Where is this coming from? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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328 views

1 answer

ios - How to hide UINavigationBar 1px bottom line

I have an app that sometimes needs its navigation bar to blend in with the content. Does anyone know how ... this 1px height line below "Root View Controller" Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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286 views

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sql server - How do I create a unique constraint that also allows nulls?

I want to have a unique constraint on a column which I am going to populate with GUIDs. However, my ... while still checking for uniqueness on actual data? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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60 views

1 answer

How does x86 paging work?

This question is meant to fill the vacuum of good free information on the subject. I believe that a good ... virtualization work: body asks for sources only. Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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