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Multi-key dictionary in c#? [duplicate]
...ool ContainsKey(K1 key1, K2 key2) {
return base.ContainsKey(key1) && this[key1].ContainsKey(key2);
}
public new IEnumerable<V> Values {
get {
return from baseDict in base.Values
from baseKey in baseDict.Keys
sel...
How can I remove the first line of a text file using bash/sed script?
...ine inside the file, you should use:
tail -n +2 "$FILE" > "$FILE.tmp" && mv "$FILE.tmp" "$FILE"
The && will make sure that the file doesn't get overwritten when there is a problem.
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How can I check if a directory exists in a Bash shell script?
...ctory"; rmdir tmpdir; fi ... or, for one command that works on both links & dirs: rm -r tmpdir
– michael
Sep 12 '14 at 1:47
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How to reset or change the MySQL root password?
...ysql stop
Start the mysqld configuration: sudo mysqld --skip-grant-tables &
In some cases, you've to create the /var/run/mysqld first:
sudo mkdir -v /var/run/mysqld && sudo chown mysql /var/run/mysqld
Run: sudo service mysql start
Login to MySQL as root: mysql -u root mysql
Replace YO...
How do the likely/unlikely macros in the Linux kernel work and what is their benefit?
I've been digging through some parts of the Linux kernel, and found calls like this:
10 Answers
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How can I implement a tree in Python?
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I came across this answer via Google. This library is really nice. I especially love the ability to use the mixin class to make an tree of any object!
– Rÿck Nöthing
Mar 8 '19 at 1:21
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Find if current time falls in a time range
...//12 o'clock
TimeSpan now = DateTime.Now.TimeOfDay;
if ((now > start) && (now < end))
{
//match found
}
For absolute times use:
DateTime start = new DateTime(2009, 12, 9, 10, 0, 0)); //10 o'clock
DateTime end = new DateTime(2009, 12, 10, 12, 0, 0)); //12 o'clock
DateTime now = D...
In Typescript, How to check if a string is Numeric
...on isNumber(value: string | number): boolean
{
return ((value != null) &&
(value !== '') &&
!isNaN(Number(value.toString())));
}
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How to prettyprint a JSON file?
I have a JSON file that is a mess that I want to prettyprint. What's the easiest way to do this in Python?
12 Answers
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How to continue a Docker container which has exited
...in the background
docker attach `docker ps -q -l` # reattach the terminal & stdin
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