大约有 40,000 项符合查询结果（耗时：0.0329秒） [XML]
Fastest way to check if string contains only digits
... return false;
}
return true;
}
Will probably be the fastest way to do it.
share
|
improve this answer
|
follow
|
...
javascript set a variable if undefined
I know that I can test for a javascript variable and then define it if it is undefined, but is there not some way of saying
...
How to call shell commands from Ruby
...!) to use quotes in a command, like so:
directorylist = %x[find . -name '*test.rb' | sort]
Which, in this case, will populate file list with all test files under the current directory, which you can process as expected:
directorylist.each do |filename|
filename.chomp!
# work with file
end
...
How can I change the color of a part of a TextView?
...sure which api versions this works on, but doesnt work for api 19 that ive tested so far, so probably only some of the most recent api versions support this
edit: as @hairraisin mentioned in the comments, try using fgcolor instead of color for the font color, then it should work for lower api level...
Swapping two variable value without using third variable
...rent
*x ^= *y;
*y ^= *x;
*x ^= *y;
}
}
Why the test?
The test is to ensure that x and y have different memory locations (rather than different values). This is because (p xor p) = 0 and if both x and y share the same memory location, when one is set to 0, both are set ...
How to override the copy/deepcopy operations for a Python object?
...l the constructor of the object being copied. Consider this example. class Test1(object): def init__(self): print "%s.%s" % (self.__class.__name__, "init") class Test2(Test1): def __copy__(self): new = type(self)() return new t1 = Test1() copy.copy(t1) t2 = Test2() ...
Can I install the “app store” in an IOS simulator?
...tor in my computer doesn't have app store. I want to use the app store to test a program I wrote on my simulator.
3 Answ...
Calling a Method From a String With the Method's Name in Ruby
...6
Using eval
eval "s.length" #=> 6
Benchmarks
require "benchmark"
test = "hi man"
m = test.method(:length)
n = 100000
Benchmark.bmbm {|x|
x.report("call") { n.times { m.call } }
x.report("send") { n.times { test.send(:length) } }
x.report("eval") { n.times { eval "test.length" }...
If list index exists, do X
...cept IndexError:
print('sorry, no 5')
# Note: this only is a valid test in this context
# with absolute (ie, positive) index
# a relative index is only showing you that a value can be returned
# from that relative index from the end of the list...
However, by definition, all items in a Py...
How to get the URL of the current page in C# [duplicate]
...rl = HttpContext.Current.Request.Url.AbsoluteUri;
// http://localhost:1302/TESTERS/Default6.aspx
string path = HttpContext.Current.Request.Url.AbsolutePath;
// /TESTERS/Default6.aspx
string host = HttpContext.Current.Request.Url.Host;
// localhost
...