spaces

问题 I decided, that I learn a bit of Python. The first introduction says that it uses indentation to group statements. While the best habit is clearly to use just one of these what happens if I interchange them? How many spaces will be considered equal to one tab? Or will it fail to work at all if tabs and spaces are mixed? 回答1: Spaces are not treated as equivalent to tab. A line indented with a tab is at a different indentation from a line indented with 1, 2, 4 or 8 spaces. Proof by counter

问题 Do I have to take out all the spaces in the file name to import it, or is there some way of telling import that there are spaces? 回答1: You should take the spaces out of the filename. Because the filename is used as the identifier for imported modules (i.e. foo.py will be imported as foo ) and Python identifiers can't have spaces, this isn't supported by the import statement. If you really need to do this for some reason, you can use the __import__ function: foo_bar = __import__("foo bar")

问题 This is my problem. In bash 3: $ test=\'One \"This is two\" Three\' $ set -- $test $ echo $2 \"This How to get bash to understand the quotes and return $2 as This is two and not \"This ? Unfortunately I cannot alter the construction of the variable called test in this example. 回答1: The reason this happens is because of the order in which the shell parses the command line: it parses (and removes) quotes and escapes, then replaces variable values. By the time $test gets replaced with One "This

问题 What is the easiest and most efficient way to remove spaces from a string in C? 回答1: Easiest and most efficient don't usually go together... Here's a possible solution: void remove_spaces(char* s) { const char* d = s; do { while (*d == ' ') { ++d; } } while (*s++ = *d++); } 回答2: Here's a very compact, but entirely correct version: do while(isspace(*s)) s++; while(*d++ = *s++); And here, just for my amusement, are code-golfed versions that aren't entirely correct, and get commenters upset. If

问题 How do you run the following command in PowerShell? C:\\Program Files\\IIS\\Microsoft Web Deploy\\msdeploy.exe -verb:sync -source:dbfullsql=\"Data Source=mysource;Integrated Security=false;User ID=sa;Pwd=sapass!;Database=mydb;\" -dest:dbfullsql=\"Data Source=.\\mydestsource;Integrated Security=false;User ID=sa;Pwd=sapass!;Database=mydb;\",computername=10.10.10.10,username=administrator,password=adminpass\" 回答1: When PowerShell sees a command starting with a string it just evaluates the string

问题 Say we have a code: int main() { char a[10]; for(int i = 0; i < 10; i++) { cin>>a[i]; if(a[i] == \' \') cout<<\"It is a space!!!\"<<endl; } return 0; } How to cin a Space symbol from standard input? If you write space, program ignores! :( Is there any combination of symbols (e.g. \'\\s\' or something like this) that means \"Space\" that I can use from standard input for my code? 回答1: It skips all whitespace (spaces, tabs, new lines, etc.) by default. You can either change its behavior, or use

问题 This question already has answers here : Closed 7 years ago . Possible Duplicate: To strip whitespaces inside a variable in PHP How can I strip / remove all spaces of a string in PHP? I have a string like $string = \"this is my string\"; The output should be \"thisismystring\" How can I do that? 回答1: Do you just mean spaces or all whitespace? For just spaces, use str_replace: $string = str_replace(' ', '', $string); For all whitespace (including tabs and line ends), use preg_replace: $string