colon

问题 I have a numpy nd array. A simplified version of my task is to take a vector from along each axis. To illustrate: import numpy x = numpy.array(range(24)).reshape((2,3,4)) x0 = x[0,0,:] x1 = x[0,:,0] x2 = x[:,0,0] However I do not necessarily know the number of dimensions x will have. So the challenge is how to place the colon : indexing operator in a variable location. An example of what such syntax could look like: n = x.ndim ind = list(np.zeros(n)) dim = 0 ind[dim] = ':' y = x[ind] or y =

问题 Please pardon my ignorance; I'm new to Git and not sure where better to look for an answer, but what's the purpose of the colon after 'example.com' in the following url (which points to a git repository on my mediatemple server)? git remote add repo_name ssh://serveradmin%example.com@example.com:/home/45678/domains/git.example.com/html/example.git 回答1: This syntax is actually wrong, but it's a bit like the scp -style syntax that you can use in git URLs, where it separates the hostname from

问题 If I have a string such as: blah blah item: value blah blah What would the expression be to just get value? 回答1: You can use this regex :\s*(\w+) $1 or group 1 has the required value \s* matches 0 to many spaces \w+ matches 1 to many characters which can be any 1 of [a-zA-Z\d_] 回答2: The regular expression would be : As in, String value = yourString.split(":")[1].split(" ")[0] 回答3: for your exact String, using **String.split()** String s="blah blah item: value blah blah"; System.out.println(s

问题 For example, I've got a text file indicating writers of powershell scripts, each line looks like: Hello world.ps1:John Smith Dowork.ps1:Blake Benn I wish to find first ":" in each line and replace with "," so I can get a csv file, Hello world.ps1,John Smith Dowork.ps1,Blake Benn I tried with "-replace", but failed: "Hello World.ps1:John Smith" -replace ":" "," At line:1 char:43 + "Hello World.ps1:John Smith" -replace ":" "," + ~~~ Unexpected token '","' in expression or statement. +

问题 I want to find the first 3 elements in list by using my_list[:3] , but I cannot guarantee that the list will be at least length 3. I can only find examples with given list and small stop. So, I want to know whether my_list[:3] is acceptable without checking the length of list. Thanks! I have tried by myself and it works well. But I want to see whether any description of doc. 回答1: Given: >>> li=[1,2,3] There are really only two cases to consider. 1) If a slice that extends beyond the end of

问题 I have the following piece of code in powershell trying to read back a piece of xml. $path = "C:\path\8429006775491.xml" $xml = [xml](Get-Content $path) $xml.ern:NewReleaseMessage The problem is the colon(:), i've tried to escape it with ' but it doesn't seem to work. Also tried to put it in {} If i edit the colon in the xml file itself and change the code accordingly it reads back fine but unfortunately that is not an option. Any help really appreciated. 回答1: In order for .NET to understand

问题 I wonder what is the inner function like? I know that you can write following var obj = { test: 'something' } But in this code, the innerfunction does not refer to a variable, but to a function. Is there anyother way to write / call the inner function? function outer(){ var a = "Outerfunction"; console.log(a) innerFct: function InnerFct() { var c = "Inner"; console.log(c) }innerFct(); } window.outer(); thank you 回答1: There are a couple of different things going on here. In this code: var obj

问题 I was wondering: what's the difference between writing a selector name with no colon @selector(mySelector) , or @selector(mySelector:) with the colon? As in: UIBarButtonItem *addButton = [[UIBarButtonItem alloc]initWith... target:self action:@selector(addAction:)]; I can't find another example without the colon, but I'm quite sure I have already seen some of them. 回答1: The colon is needed after the method's name if and only if the method takes an argument. No function parameters: -(void

问题 This question already has answers here : Explanation of colon operator in “: ${foo=value}” (2 answers) What is the purpose of the : (colon) GNU Bash builtin? (11 answers) Closed 4 years ago . I could not find any documentation that would explain the syntax below. What does it do inside a bash script? Is it a test? : ${foo:=bar}; export foo 回答1: The : command is the null utility: This utility shall only expand command arguments. It is used when a command is needed, as in the then condition of

问题 This is part of the wordpress code and I don't understand it: if ( is_404() && $template = get_404_template() ) : elseif ( is_search() && $template = get_search_template() ) : elseif ( is_tax() && $template = get_taxonomy_template() ) : elseif ( is_front_page() && $template = get_front_page_template() ) : elseif ( is_home() && $template = get_home_template() ) : elseif ( is_attachment() && $template = get_attachment_template() ) : remove_filter('the_content', 'prepend_attachment'); elseif (