Getting last modification date of a PostgreSQL database table
There is no reliable, authorative record of the last modified time of a table. Using the relfilenode is wrong for a lot of reasons: Writes are initially recorded to the write-head log (WAL), then lazily to the heap (the table files). Once the record is in WAL,...
How do I make this sed script a “one liner”?
An ANSI C string -- with $'' -- can contain backslash escapes, like \n -- so you can have a newline in sed's arguments while still having the shell command invoking sed be only one line. sed -i $'/INTERPRETER_PYTHON_DISTRO_MAP/,/version_added/ {\n /default/a\\...
while loop with break after first iteration is faster than if statement [closed]
iteration while loop: 15ms - if statement is 31ms A comparison of two similar program with runtimes that only differ by 16ms is just a rounding error. It's unclear what optimization flags were used in compiling the program. On those coding competition sites,...
How to OCR a PDF file and get the text stored within the PDF?
ocrmypdf does a good job and can be used like this: ocrmypdf in.pdf out.pdf To install: pip install ocrmypdf or sudo apt install ocrmypdf # ubuntu sudo dnf -y install ocrmypdf # fedora After learning that Tesseract can now also produce searchable PDFs, I found...
Keyboard shortcut to access the first link in a Google search page?
Note: As of 2018 the answer is out of date. The triangle arrow next to the search result no longer appears. Assuming you mean the first search result, this is already built in to Google! Notice there is already a little ▶ arrow will next to the first search...
If …Else If wont work [closed]
First of all, put the javascript code between a <script></script> tag because javascript code will not run in an html <div></div> tag. Then, instead of x == 0||9||2, use x == 0 || x == 9 || x == 2. Kindly indent your code for easier...
How to convert the object of character to string
Your object of characters is already almost an array. It has numeric indices, but is missing the .length property. If you add that it, it will be an "array like" object, which can then be passed to Array.from to get a proper array. Once you have a real array,...
How can I write the approximate value of PI?
Because your { and } is wrong. I think brackets will be as given below If the formula is PI = 4/1 - 4/3 + 4/5 - 4/7 + ... ( Leibniz's Series ) then you can formalate as given below #include <iostream> using namespace std; int main() { double n, i; //...
c# Regex catch string between two string [duplicate]
You can try this: <[a-z\s]+id=[\'\"]mobile[\w]+[\'\"][\sa-zA-Z\d\'\=\;\:]*>([a-zA-Z\d\s]+)<[\/a-z\s]+> Anyway it will not match special chars or symbols. You can test and optimize it here: https://regex101.com/r/fnYQ1o/10 EDIT - Code example This...
Do I need CSRF token if I’m using Bearer JWT?
This is relevant but doesn't necessarily answer 100% of your question: https://security.stackexchange.com/a/166798/149676 The short of it is that as long as authentication isn't automatic (typically provided by the browser) then you don't have to worry about...