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Is there a standard function to check for null, undefined, or blank variables in JavaScript?
...n the specification at the ToBoolean section.
Furthermore, if you do not know whether a variable exists (that means, if it was declared) you should check with the typeof operator. For instance
if( typeof foo !== 'undefined' ) {
// foo could get resolved and it's defined
}
If you can be sure ...
In C, how should I read a text file and print all strings
...ad doesn't set it so put a \0 in the last position
// and buffer is now officially a string
buffer[string_size] = '\0';
if (string_size != read_size)
{
// Something went wrong, throw away the memory and set
// the buffer to NULL
free(buff...
How to select unique records by SQL
...rite the table name. Somehow when I wrote this it worked but I just tested now and it didn't without the table name before the *
– htafoya
Nov 15 '17 at 7:41
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How do I send a POST request as a JSON?
...thon 2.x. You are using Python3 so the imports will be different. It would now be import urllib.request and urllib.request.Request(). Furthermore, printing the req object does nothing interesting. You can clearly see the headers have been added by printing req.headers. Beyond that, I am not sur why ...
YAML current date in rmarkdown
...lt;%= format(Sys.time(), "%d %B, %Y") %>
author: baptiste
---
You can now use a brew_n_render function that would preprocess the doc using brew and then run in through rmarkdown.
brew_n_render <- function(input, ...){
output_file <- gsub("\\.[R|r]md$", ".html", input)
brew::brew(inpu...
Big-O summary for Java Collections Framework implementations? [closed]
...soon. While it is probably safe to assume that the audience members will know Big-O notation, it is probably not safe to assume that they will know what the order of the various operations on various collection implementations is.
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What is the difference between a web API and a web service?
...
Not "absolutely the same" if there are restrictions now are they?
– Ojonugwa Jude Ochalifu
Feb 6 '18 at 15:53
add a comment
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Import Error: No module named numpy
...k as they defaulted the installation to python 3's package folders (for unknown reasons). I used pip2 install numpy to resolve the errors for "no module found...".
– Arshin
Sep 3 '18 at 7:11
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How to split a comma-separated value to columns
... fail!) or the really fast JSON-hack. For older version look for the well-known XML-hack (json and xml details here). Or look for one of the may iTVFs based on recursive CTEs.
– Shnugo
Nov 21 '19 at 10:35
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How to get a list of installed android applications and pick one to run
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@DavidT. I already figured it out. Now, I'm working on how can I access those installed app in order to create a shortcut inside my App. Is that possible?
– androidBoomer
Jan 24 '14 at 1:35
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