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When to use an assertion and when to use an exception
... check something that might happen.
For example, a function might divide by 0, so an exception should be used, but an assertion could be used to check that the harddrive suddenly disappears.
An assertion would stop the program from running, but an exception would let the program continue running...
How to calculate the CPU usage of a process by PID in Linux from C?
..., and /proc/<PID>/stat tells you how many jiffies have been executed by a single process.
– caf
Sep 15 '09 at 6:21
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Finding which process was killed by Linux OOM killer
...d out in your running system which process is candidate for getting killed by oom mechanism
dstat --top-oom
--out-of-memory---
kill score
java 77
java 77
java 77
and as per man page
--top-oom
show process that will be killed by OOM the first
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Secure hash and salt for PHP passwords
... hashing passwords is simple: preventing malicious access to user accounts by compromising the database. So the goal of password hashing is to deter a hacker or cracker by costing them too much time or money to calculate the plain-text passwords. And time/cost are the best deterrents in your arsenal...
What exactly does @synthesize do?
...May 29 '13 at 19:23
Reuben Mallaby
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answered Jul 16 '10 at 15:37
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How to filter by IP address in Wireshark?
...ost 192.168.1.101
Wireshark will only capture packet sent to or received by 192.168.1.101. This has the benefit of requiring less processing, which lowers the chances of important packets being dropped (missed).
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Create a pointer to two-dimensional array
..., i don't quite understand you. the storage in all these cases is provided by the array l_matix itself. The pointers to them take storage from where-ever they are declared in and as (stack, static data segment, ...).
– Johannes Schaub - litb
Jun 27 '09 at 19:32...
How to find time complexity of an algorithm
... not well-defined in the first place anyway. So we can multiply or divide by a constant factor to get to the simplest expression.
So 2N becomes just N.
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Is VB really case insensitive?
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You can turn off auto-correct by cheating. Right-click on a vb file and select "Open With". Then pick something like "XML (Text) Editor". You will lose all the VB-specific functionality like auto-correct.
– Jonathan Allen
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Good ways to manage a changelog using git?
...p as something like "Merged branch feature-foobar", you can shorten things by only showing that message, and not all the little commits that you merged, which together form the feature:
git log --pretty=%s --first-parent # only follow first parent of merges
You might be able to augment this with...