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Difference between single and double square brackets in Bash
... a weird name.
] is just an argument of [ that prevents further arguments from being used.
Ubuntu 16.04 actually has an executable for it at /usr/bin/[ provided by coreutils, but the bash built-in version takes precedence.
Nothing is altered in the way that Bash parses the command.
In particular...
Python extract pattern matches
...
You need to capture from regex. search for the pattern, if found, retrieve the string using group(index). Assuming valid checks are performed:
>>> p = re.compile("name (.*) is valid")
>>> result = p.search(s)
>>> resul...
How to convert currentTimeMillis to a date in Java?
...lliseconds in certain log file generated in server, I also know the locale from where the log file was generated, my problem is to convert milliseconds to date in specified format.
The processing of that log is happening on server located in different time zone. While converting to "SimpleDateFormat...
How can I check if a value is a json object?
...ave to check the type with typeof
var response=jQuery.parseJSON('response from server');
if(typeof response =='object')
{
// It is JSON
}
else
{
if(response ===false)
{
// the response was a string "false", parseJSON will convert it to boolean false
}
else
{
// the response was...
CSS @font-face not working with Firefox, but working with Chrome and IE
...family' Arial, Helvetica etc It was showing up fine in every browser apart from Firefox. I added the coma and it worked.
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Git: “Not currently on any branch.” Is there an easy way to get back on a branch, while keeping the
...ch. I would still go with babay's answer, but if you want to save yourself from writing two extra commands I guess this is the way to go.
– Erik B
Jul 8 '13 at 13:32
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What is the difference between g++ and gcc?
...
From this answer, I conclude that effectively g++ command is just gcc with a bunch of flags .. Why then, there are two different binaries(of approximately the same size ) for gcc and g++ in linux ?. Shouldn't we have just ...
RAII and smart pointers in C++
...we just create objects on the stack. For instance (and stealing an example from another answer):
void foo() {
std::string str;
// Do cool things to or using str
}
This works fine - but what if we want to return str? We could write this:
std::string foo() {
std::string str;
// Do ...
How to fix Error: listen EADDRINUSE while using nodejs?
... @UlyssesAlves just open a terminal window and kill the process from there.
– Nobita
Jan 5 '16 at 13:37
@No...
What is the yield keyword used for in C#?
...mbers where you were on each additional cycle of the function and picks up from there.
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