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Only mkdir if it does not exist [duplicate]
...ld send a message to the user and ask for input, abort, or do other things if [[ -e dir && ! -d dir ]] is valid.
– konsolebox
Sep 4 '13 at 22:17
...
Escape angle brackets in a Windows command prompt
...t the single escape with quotes:
cmd /c "echo ^<html^>"|findstr .
If you want to use the delayed expansion technique to avoid escapes, then there are even more surprises (You might not be surprised if you are an expert on the design of CMD.EXE, but there is no official MicroSoft documentati...
How to view corresponding SQL query of the Django ORM's queryset?
...logging message
# to its parent (will send if set to True)
},
'django.db': {
# django also has database level logging
},
},
}
Another method in case application is generating html output - django debug toolbar can be used.
...
Cross-referencing commits in github
...
StackExchange.ifUsing("editor", function () {
StackExchange.using("externalEditor", function () {
StackExchange.using("snippets", function () {
StackExchange.snippets.init();
...
How to exit a 'git status' list in a terminal?
... The pager used by git is selected by core.pager configuration variable (if it is set), then GIT_PAGER enviroment variable, then PAGER environment variable, then less as fallback.
– Jakub Narębski
Nov 8 '09 at 14:49
...
How to provide animation when calling another activity in Android?
...other methods of the ActivityOptions builder and the ActivityOptionsCompat if you are using the Support Library.
API 5+:
For apps targeting API level 5+ there is the Activities overridePendingTransition method. It takes two resource IDs for the incoming and outgoing animations. An id of 0 will...
How can one see the structure of a table in SQLite? [duplicate]
...
If you want to get the table info for an attached database 'foo', you run PRAGMA foo.table_info(table_name);
– paddy
May 1 '17 at 5:49
...
Replace a string in shell script using a variable
...
If you want to interpret $replace, you should not use single quotes since they prevent variable substitution.
Try:
echo $LINE | sed -e "s/12345678/\"${replace}\"/g"
assuming you want the quotes put in. If you don't want t...
What's the difference between Thread start() and Runnable run()
...d creation.
R1 r1 = new R1();
R2 r2 = new R2();
r1 and r2 are just two different objects of classes that implement the Runnable interface and thus implement the run() method. When you call r1.run() you are executing it in the current thread.
Second example: Two separate threads.
Thread t1 = ne...
What would be C++ limitations compared C language? [closed]
...nt question which asks about a generics library for C - the questioner specifically states that they do not want to use C++.
C is a complete programming language. C is not an arbitrary subset of C++. C is not a subset of C++ at all.
This is valid C:
foo_t* foo = malloc ( sizeof(foo_t) );
To m...