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How to extract the first two characters of a string in shell scripting?
... in-shell method is usually better if you're going to be doing it a lot (like 50,000 times per report as you mention) since there's no process creation overhead. All solutions which use external programs will suffer from that overhead.
If you also wanted to ensure a minimum length, you could pad it...
How can I connect to MySQL in Python 3 on Windows?
...g pymysql.install_as_MySQLdb()
https://pypi.python.org/pypi/cymysql
fork of pymysql with optional C speedups
https://pypi.python.org/pypi/mysqlclient
Django's recommended library.
Friendly fork of the original MySQLdb, hopes to merge back some day
The fastest implementation, as it is C based...
glob exclude pattern
... answered Mar 29 '16 at 21:32
KenlyKenly
13.8k55 gold badges3232 silver badges4949 bronze badges
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Why is early return slower than else?
This is a follow-up question to an answer I gave a few days back . Edit: it seems that the OP of that question already used the code I posted to him to ask the same question , but I was unaware of it. Apologies. The answers provided are different though!
...
How to access command line arguments of the caller inside a function?
...e bash ref manual says this stuff is captured in BASH_ARGV,
although it talks about "the stack" a lot.
#!/bin/bash
function argv {
for a in ${BASH_ARGV[*]} ; do
echo -n "$a "
done
echo
}
function f {
echo f $1 $2 $3
echo -n f ; argv
}
function g {
echo g $1 $2 $3
...
Command to list all files in a folder as well as sub-folders in windows
...and.
I have read the help for "dir" command but coudn't find what I was looking for.
Please help me what command could get this.
...
Spring @Autowired usage
... there was a value in having a "centralized, declarative, configuration" like the xml files we all used to use. Then I realized that most of the stuff in the files wasn't configuration - it was never changed anywhere after development, ever. Then I realized that "centralized" only has value in quite...
What is the difference between return and return()?
...ent. It is syntactically similar to other simple control flow statements like break and continue that don't use parentheses either.
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Update all objects in a collection using LINQ
...ou can use a ForEach extension method, if you want to use just the framework you can do
collection.Select(c => {c.PropertyToSet = value; return c;}).ToList();
The ToList is needed in order to evaluate the select immediately due to lazy evaluation.
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Python's equivalent of && (logical-and) in an if-statement
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ChristopheDChristopheD
95.7k2424 gold badges148148 silver badges167167 bronze badges
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