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Pipe subprocess standard output to a variable [duplicate]
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@Insomaniacal In this case, I knew usage is generally dumped to stderr. But in general, a simple test is to cmd > /dev/null if you still see output it's going to stderr. Confirm by piping stderr cmd 2> /dev/null and it should vanish into /dev/null.
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Undoing a git bisect mistake
I'm doing a non-automated git bisect via command line. All is going well until I accidentally hit return on the wrong line in my command history, and rather than running the test, I run 'git bisect good' (or bad). Oops - I don't yet know if this commit should be marked good or bad, yet that's what I...
Why are private fields private to the type, not the instance?
...this);
}
}
Can the compiler necessarily figure out that other is actually this? Not in all cases. One could argue that this just shouldn't compile then, but that means we have a code path where a private instance member of the correct instance isn't accessible, which I think is even worse.
On...
Ruby combining an array into one string
In Ruby is there a way to combine all array elements into one string?
3 Answers
3
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JavaScript: empty array, [ ] evaluates to true in conditional structures. Why is this?
...tring)
null
undefined
NaN (a special Number value meaning Not-a-Number!)
All other values are truthy, including "0" (zero in quotes), "false" (false in quotes), empty functions, empty arrays, and empty objects.
share
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PHP DateTime::modify adding and subtracting months
...s not a bug:
The current behavior is correct. The following happens internally:
+1 month increases the month number (originally 1) by one. This makes the date 2010-02-31.
The second month (February) only has 28 days in 2010, so PHP auto-corrects this by just continuing to count days from February...
javascript check for not null
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while technically this works, a double not (!!) is a programming faux-pas. It is really the equivalent of if(val), which is much clearer to read. I would stick to that (fyi Ujwal, !!val should technically work in C or C++ also) see here f...
What is the purpose of Order By 1 in SQL select statement?
...is only has the sql tag. In Standard SQL only column correlation names are allowed in the OREDER BY clause because, in theory, the table correlation names are out of scope i.e. should be ORDER BY PAYMENT_DATE;. Of course, not all SQL implementations conform to Standards.
– oned...
How to show SQL queries run in the Rails console?
... Perfect, just what I needed. Have any recommendation where to go find small tricks such as these are documented?
– randombits
May 29 '10 at 18:18
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Netbeans: how to change @author
...ou might also want to do a Find and Replace(Ctrl + Shift + H) for changing all the already place @ author tag in the project. As the change above doesn't change the already placed @ author.
– T04435
Oct 12 '15 at 6:25
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