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How to retrieve the current value of an oracle sequence without increment it?
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SELECT last_number
FROM all_sequences
WHERE sequence_owner = '<sequence owner>'
AND sequence_name = '<sequence_name>';
You can get a variety of sequence metadata from user_sequences, all_sequences and dba_sequences.
These views wo...
How to get terminal's Character Encoding
... is not good. a more complete solution would be something like: echo ${LC_ALL:-${LC_CTYPE:-${LANG}}}. then again, the variable being set isn't a guarantee that they're valid, so you should stick to the locale program (as seen in other answers here).
– Mike Frysinger
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How to see which commits in one branch aren't in the other?
...rence. For example, if you have two branches, A and B, a usual way to list all commits on only one side of them is with --left-right, like the example above in the description of that option. It however shows the commits that were cherry-picked from the other branch (for example, "3rd on b" may be c...
How can I use grep to find a word inside a folder?
..., a directory is a kind of file (there is a term "regular file" to specifically refer to entities that are called just "files" in Windows).
grep -nr string reads the content to search from the standard input, that is why it just waits there for input from you, and stops doing so when you press ^C (...
Open firewall port on CentOS 7
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Use this command to find your active zone(s):
firewall-cmd --get-active-zones
It will say either public, dmz, or something else. You should only apply to the zones required.
In the case of public try:
firewall-cmd --zone=public --add-port=2888/tcp --permanent
Then reme...
What are the main purposes of using std::forward and which problems it solves?
... references. What is the purpose of doing that? How would that affect the called function inner if we leave t1 & t2 as lvalues?
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Strengths of Shell Scripting compared to Python [closed]
...programs in shell.
Shell scripting reuses entire programs.
Shell is universally available (on anything like Unix) - Python is not necessarily installed.
'Tis true that you can do everything in Python that you can do in shell; 'tis also true that there are things that are easy in Python that are ha...
Null vs. False vs. 0 in PHP
...ers can spot/utilize the difference between Null and False and 0 and all the other good "nothing" entities.
What is the difference, specifically in PHP? Does it have something to do with === ?
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Is BCrypt a good hashing algorithm to use in C#? Where can I find it? [closed]
...hat cannot be reverted to the original string.
Symmetric Encryption - (Usually just referred to as 'encryption') - The act of taking a string and producing a sequence of characters that can be decrypted to the original string through the use of the same encryption key that encrypted it.
Rainbow T...
Get int value from enum in C#
I have a class called Questions (plural). In this class there is an enum called Question (singular) which looks like this.
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