大约有 35,000 项符合查询结果（耗时：0.0500秒） [XML]
delete map[key] in go?
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Strangely enough,
package main
func main () {
var sessions = map[string] chan int{};
delete(sessions, "moo");
}
seems to work. This seems a poor use of resources though!
Another way is to check for existence and use the value itself:
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What is the best way to get all the divisors of a number?
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Given your factorGenerator function, here is a divisorGen that should work:
def divisorGen(n):
factors = list(factorGenerator(n))
nfactors = len(factors)
f = [0] * nfactors
while True:
yield reduce(lambda x, y: x*y, [factors[x][0]**f[x] for x in range(nfactors)], 1)
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How can I see the assembly code for a C++ program?
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Ask the compiler
If you are building the program yourself, you can ask your compiler to emit assembly source. For most UNIX compilers use the -S switch.
If you are using the GNU assembler, compiling with -g -Wa,-alh will giv...
How do I check CPU and Memory Usage in Java?
I need to check CPU and memory usage for the server in java, anyone know how it could be done?
15 Answers
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Base64 encoding and decoding in client-side Javascript
... as Firefox, Chrome, Safari, Opera and IE10+ can handle Base64 natively. Take a look at this Stackoverflow question. It's using btoa() and atob() functions.
For server-side JavaScript (Node), you can use Buffers to decode.
If you are going for a cross-browser solution, there are existing libraries...
Git keeps prompting me for a password
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I think you may have the wrong Git repository URL.
Open .git/config and find the [remote "origin"] section. Make sure you're using the SSH one:
ssh://git@github.com/username/repo.git
You can see the SSH URL in the main page of...
Sorting a vector of custom objects
...ction or a function object) which would operate on one of the fields (as a key for sorting) in the custom object should be used.
Am I on the right track?
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Arguments or parameters? [duplicate]
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Mehrdad AfshariMehrdad Afshari
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Shortcut to open file in Vim
I want to open a file in Vim like in Eclipse using Ctrl + Shift + R , or via the Ctrl + N option of autofill. Invoke a keyboard shortcut, type the file name/pattern, and choose from all the matching files names.
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Syntax for creating a two-dimensional array
...nt[][] multi = new int[5][10];
... which is a short hand for something like this:
int[][] multi = new int[5][];
multi[0] = new int[10];
multi[1] = new int[10];
multi[2] = new int[10];
multi[3] = new int[10];
multi[4] = new int[10];
Note that every element will be initialized to the default valu...