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“Notice: Undefined variable”, “Notice: Undefined index”, and “Notice: Undefined offset” using PHP
...y wiki
24 revs, 13 users 26%Rizier123
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Check synchronously if file/directory exists in Node.js
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123
Looking at the source, there's a synchronous version of path.exists - path.existsSync. Looks ...
How to use MySQL DECIMAL?
...AL. I need the row to be able to contain a number anywhere from 00.0001 to 99.9999. How would I structure it to work like so?
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How do I verify/check/test/validate my SSH passphrase?
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123
You can verify your SSH key passphrase by attempting to load it into your SSH agent. With Open...
Where do I find the current C or C++ standard documents?
...14882:2003: $30 from ansi.org $48 from SAI Global
C++98 – ISO/IEC 14882:1998: $90 NZD (about $60 US) from Standards New Zealand
C17/C18 – ISO/IEC 9899:2018: $185 from SAI Global / $116 from INCITS/ANSI / N2176 / c17_updated_proposed_fdis.pdf draft from November 2017 (Link broken, see Wayback Mac...
Splitting string into multiple rows in Oracle
...racle's database object naming conventions. It will hurl on a string like '123,456,789' for instance.
– APC
Jan 23 '18 at 7:09
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Match multiline text using regular expression
...ntire string.
Pattern p = Pattern.compile("xyz");
Matcher m = p.matcher("123xyzabc");
System.out.println(m.find()); // true
System.out.println(m.matches()); // false
Matcher m = p.matcher("xyz");
System.out.println(m.matches()); // true
Furthermore, MULTILINE doesn't mean what you think it d...
What is the most efficient way to deep clone an object in JavaScript?
...e(JSON.stringify(object))
const a = {
string: 'string',
number: 123,
bool: false,
nul: null,
date: new Date(), // stringified
undef: undefined, // lost
inf: Infinity, // forced to 'null'
re: /.*/, // lost
}
console.log(a);
console.log(typeof a.date); // Date obje...
Read an Excel file directly from a R script
....7239 148.0940 255.0124 100
# readxl 122.0238 122.8448 132.4021 123.6964 130.2881 214.5138 100
# gdata 2004.4745 2042.0732 2087.8724 2062.5259 2116.7795 2425.6345 100
So readxl is the winner, with openxlsx competitive and gdata a clear loser. Taking each measure relative to th...
Is PowerShell ready to replace my Cygwin shell on Windows? [closed]
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grep
Select-String cmdlet and -match operator work with regexes. Also you can directly ma...