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GDB corrupted stack frame - How to debug?
...have the following stack trace. Is it possible to make out anything useful from this for debugging?
5 Answers
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How do I get bash completion to work with aliases?
...lly figured out how to do this properly! Step 1) Copy git-completion.bash from <your git install folder>/etc/bash-completion.d/ to ~/.git-completion.bash Step 2) add source ~/.git-completion.bash to your .bash_profile Step 3) Add __git_complete gco _git_checkout anywhere after the above lin...
Difference between “and” and && in Ruby?
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From Andrew Marshall's link: "Another way of thinking about and is as a reversed if statement modifier: next if widget = widgets.pop becomes widget = widgets.pop and next. That's a great way of putting it, really made it "cli...
Duplicate symbols for architecture x86_64 under Xcode
...loaded same functions twice.
As the issue disappear after removing -ObjC from Other Linker Flags,
this means that this option result that functions loads twice:
from Technical Q&A
This flag causes the linker to load every object file in the library
that defines an Objective-C class or ...
ASP.NET MVC - Attaching an entity of type 'MODELNAME' failed because another entity of the same type
...h a custom join table in a disconnected app. Even with the entity grabbed from the database, I was getting referential errors, etc. I was using "context.Entry(score).State = System.Data.Entity.EntityState.Modified;" but this finally worked! Thank you!!
– firecape
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java.util.Date vs java.sql.Date
...36123. These magic numbers can be used in SQL queries and will be portable from database to another and will let you avoid this part of JDBC/Java Date API:s entirely.
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How to use the IEqualityComparer
...lass to do this work, but the execution of the function causes a big delay from the function without distinct, from 0.6 sec to 3.2 sec!
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How do you diff a directory for only files of a specific type?
...f -x '*.foo' -x '*.bar' -x '*.baz' /destination/dir/1 /destination/dir/2
From the Comparing Directories section of info diff (on my system, I have to do info -f /usr/share/info/diff.info.gz):
To ignore some files while comparing directories, use the '-x
PATTERN' or '--exclude=PATTERN' option...
How to convert date to timestamp in PHP?
How do I get timestamp from e.g. 22-09-2008 ?
19 Answers
19
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String isNullOrEmpty in Java? [duplicate]
....isNotEmpty(str)
StringUtils.isBlank(str) or StringUtils.isNotBlank(str)
from Apache commons-lang.
The difference between empty and blank is : a string consisted of whitespaces only is blank but isn't empty.
I generally prefer using apache-commons if possible, instead of writing my own utility m...