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How to negate the whole regex?
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102
Use negative lookaround: (?!pattern)
Positive lookarounds can be used to assert that a pattern...
What does git push -u mean?
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answered Apr 6 '11 at 4:06
Rafe KettlerRafe Kettler
66.2k1717 gold badges143143 silver badges145145 bronze badges
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List tables in a PostgreSQL schema
...n use regular-expression notations such as character classes, for example [0-9] to match any digit. All regular expression special characters work as specified in Section 9.7.3, except for . which is taken as a separator as mentioned above, * which is translated to the regular-expression notation .*...
How do I pick randomly from an array?
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1140
Just use Array#sample:
[:foo, :bar].sample # => :foo, or :bar :-)
It is available in Ruby ...
How to select lines between two marker patterns which may occur multiple times with awk/sed
... to trigger the print when necessary:
$ awk '/abc/{flag=1;next}/mno/{flag=0}flag' file
def1
ghi1
jkl1
def2
ghi2
jkl2
How does this work?
/abc/ matches lines having this text, as well as /mno/ does.
/abc/{flag=1;next} sets the flag when the text abc is found. Then, it skips the line.
/mno/{f...
Base64: What is the worst possible increase in space usage?
...3) * 4
So, for a 16kB array, the base-64 representation will be ceil(16*1024/3)*4 = 21848 bytes long ~= 21.8kB.
A rough approximation would be that the size of the data is increased to 4/3 of the original.
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How can I write data in YAML format in a file?
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203
import yaml
data = dict(
A = 'a',
B = dict(
C = 'c',
D = 'd',
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How can I set the Secure flag on an ASP.NET Session Cookie?
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edited Jun 2 '17 at 8:07
Tadas Šukys
3,75644 gold badges2323 silver badges3030 bronze badges
answer...
Oracle SELECT TOP 10 records
... an big problem with an SQL Statement in Oracle. I want to select the TOP 10 Records ordered by STORAGE_DB which aren't in a list from an other select statement.
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Get color value programmatically when it's a reference (theme)
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Emanuel MoecklinEmanuel Moecklin
24.8k1010 gold badges6363 silver badges7676 bronze badges
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