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Check if a string matches a regex in Bash script
... strings, which IMHO it shouldn't. Suppose badvar is not defined, then [[ "1234" =~ "$badvar" ]]; echo $? gives (incorrectly) 0, while expr match "1234" "$badvar" >/dev/null ; echo $? gives correct result 1.
We have to use >/dev/null to hide expr match's output value, which is the number of c...
How to get name of exception that was caught in Python?
...nswered Aug 11 '13 at 21:06
user1234user1234
4,93533 gold badges2222 silver badges3434 bronze badges
...
Create new user in MySQL and give it full access to one database
...
To me this worked.
CREATE USER 'spowner'@'localhost' IDENTIFIED BY '1234';
GRANT ALL PRIVILEGES ON test.* To 'spowner'@'localhost';
FLUSH PRIVILEGES;
where
spowner : user name
1234 : password of spowner
test : database 'spowner' has access right to
...
How do I cast a string to integer and have 0 in case of error in the cast with PostgreSQL?
...value;
END;
$$ LANGUAGE plpgsql;
Testing:
=# select convert_to_integer('1234');
convert_to_integer
--------------------
1234
(1 row)
=# select convert_to_integer('');
NOTICE: Invalid integer value: "". Returning NULL.
convert_to_integer
--------------------
(1 row)
=# sele...
How to find a min/max with Ruby
...ages, you could write:
def max(*values)
values.max
end
Output:
max(7, 1234, 9, -78, 156)
=> 1234
This abuses the properties of the splat operator to create an array object containing all the arguments provided, or an empty array object if no arguments were provided. In the latter case, the...
Round to at most 2 decimal places (only if necessary)
...oundToTwo(10)
10
roundToTwo(1.7777777)
1.78
roundToTwo(9.1)
9.1
roundToTwo(1234.5678)
1234.57
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Convert JS Object to form data
... which is like this:
{
"orderPrice":"11",
"cardNumber":"************1234",
"id":"8796191359018",
"accountHolderName":"Raj Pawan",
"expiryMonth":"02",
"expiryYear":"2019",
"issueNumber":null,
"billingAddress":{
"city":"Wonderland",
"code":"8796682911767",
"f...
How do you concatenate Lists in C#?
...tring> FirstList = new List<string>();
FirstList.Add("1234");
FirstList.Add("4567");
// In my code, I know I would not have this here but I put it in as a demonstration that it will not be in the secondList twice
FirstList.Add("Three");
...
What is Double Brace initialization in Java?
...", new HashMap(){{
put("0", new HashMap(){{
put("id", "1234");
}});
put("abc", new HashMap(){{
put("id", "5678");
}});
}});
}};
... will produce these classes:
Test$1$1$1.class
Test$1$1$2.class
Test$1$1.class
Test$1.class
Test.class
Th...
Can you run GUI applications in a Docker container?
...irefox
RUN mkdir ~/.vnc
# Setup a password
RUN x11vnc -storepasswd 1234 ~/.vnc/passwd
# Autostart firefox (might not be the best way to do it, but it does the trick)
RUN bash -c 'echo "firefox" >> /.bashrc'
This will create a Docker container running VNC with the password 1234:
...