大约有 35,432 项符合查询结果(耗时:0.0309秒) [XML]

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Which is faster: while(1) or while(2)?

...arying levels of optimization: int main(void) { while(1) {} return 0; } int main(void) { while(2) {} return 0; } Even with no optimizations (-O0), the generated assembly was identical for both programs. Therefore, there is no speed difference between the two loops. For reference, ...
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How to make div background color transparent in CSS

...iddle here. -ms-filter: "progid:DXImageTransform.Microsoft.Alpha(Opacity=50)"; /* IE 8 */ filter: alpha(opacity=50); /* IE 5-7 */ -moz-opacity: 0.5; /* Netscape */ -khtml-opacity: 0.5; /* Safari 1.x */ opacity: 0.5; /* Good browsers */ Note: these are NOT CSS3...
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What's the idiomatic syntax for prepending to a short python list?

... The s.insert(0, x) form is the most common. Whenever you see it though, it may be time to consider using a collections.deque instead of a list. share | ...
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How do you create a yes/no boolean field in SQL server?

... The equivalent is a BIT field. In SQL you use 0 and 1 to set a bit field (just as a yes/no field in Access). In Management Studio it displays as a false/true value (at least in recent versions). When accessing the database through ASP.NET it will expose the field as a b...
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ab load testing

... default it will hit http:// protocol if you don't specify it. ab -k -c 350 -n 20000 example.com/ By issuing the command above, you will be hitting http://example.com/ with 350 simultaneous connections until 20 thousand requests are met. It will be done using the keep alive header. After the pro...
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Reset/remove CSS styles for element only

...initial values: .reset-this { animation : none; animation-delay : 0; animation-direction : normal; animation-duration : 0; animation-fill-mode : none; animation-iteration-count : 1; animation-name : none; animation-play-state : running; animation-timing-function ...
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How to check if an int is a null

... An int is not null, it may be 0 if not initialized. If you want an integer to be able to be null, you need to use Integer instead of int. Integer id; String name; public Integer getId() { return id; } Besides the statement if(person.equals(null)) can...
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Add one row to pandas DataFrame

...n range(5): >>> df.loc[i] = ['name' + str(i)] + list(randint(10, size=2)) >>> df lib qty1 qty2 0 name0 3 3 1 name1 2 4 2 name2 2 8 3 name3 2 1 4 name4 9 6 share...
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Odd behavior when Java converts int to byte?

...mber is the positive version of that number For example: 11111111 goes to 00000001 = -1. This is what Java will display as the value. What you probably want to do is know the unsigned value of the byte. You can accomplish this with a bitmask that deletes everything but the least significant 8 bit...
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How to compare strings ignoring the case

... You're looking for casecmp. It returns 0 if two strings are equal, case-insensitively. str1.casecmp(str2) == 0 "Apple".casecmp("APPLE") == 0 #=> true Alternatively, you can convert both strings to lower case (str.downcase) and compare for equality. ...