大约有 14,100 项符合查询结果（耗时：0.0373秒） [XML]
differences in application/json and application/x-www-form-urlencoded
... have on the server side. I see sites like stackoverflow & Twitter use x-www-form-urlencoded for AJAX requests like vote etc. The response sent back is JSON. I would think that it's better to have a symmetrical request/response pair i.e. both JSON.
– user
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Getting a better understanding of callback functions in JavaScript
...and passing in a function to another function as a callback and having it execute, but I'm not understanding the best implementation to do that. I'm looking for a very basic example, like this:
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object==null or null==object?
... left side of == isn't really useful in Java since Java requires that the expression in an if evaluate to a boolean value, so unless the constant is a boolean, you'd get a compilation error either way you put the arguments. (and if it is a boolean, you shouldn't be using == anyway...)
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What is the string concatenation operator in Oracle?
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It is ||, for example:
select 'Mr ' || ename from emp;
The only "interesting" feature I can think of is that 'x' || null returns 'x', not null as you might perhaps expect.
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Filter dict to contain only certain keys?
...of any size. Both in terms of speed and memory. Since this is a generator expression, it processes one item at a time, and it doesn't looks through all items of old_dict.
Removing everything in-place:
unwanted = set(keys) - set(your_dict)
for unwanted_key in unwanted: del your_dict[unwanted_key]
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Retrieve the position (X,Y) of an HTML element relative to the browser window
I want to know how to get the X and Y position of HTML elements such as img and div in JavaScript relative to the browser window.
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Are static class variables possible in Python?
...it possible to have static class variables or methods in Python? What syntax is required to do this?
21 Answers
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What's the correct way to convert bytes to a hex string in Python 3?
What's the correct way to convert bytes to a hex string in Python 3?
9 Answers
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How can I multiply all items in a list together with Python?
...a function that takes
a list of numbers and multiplies them together. Example:
[1,2,3,4,5,6] will give me 1*2*3*4*5*6 . I could really use your help.
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Generating a list of which files changed between hg versions
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hg status --rev x:y
where x and y are desired revision numbers (or tag or branch names).
If you are using the terminal in windows add hg status --rev x:y> your-file.txt to save the list to a file.
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