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How can I profile C++ code running on Linux?
I have a C++ application, running on Linux, which I'm in the process of optimizing. How can I pinpoint which areas of my code are running slowly?
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How to determine if a string is a number with C++?
...line from the file I am reading is a number or not (I will know if it is a parameter this way). I wrote the below function which I believe was working smoothly (or I accidentally edited to stop it or I'm schizophrenic or Windows is schizophrenic):
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How can I get a file's size in C++? [duplicate]
Let's create a complementary question to this one .
What is the most common way to get the file size in C++?
Before answering, make sure it is portable (may be executed on Unix, Mac and Windows),
reliable, easy to understand and without library dependencies (no boost or qt, but for instance glib is...
Uploading images using Node.js, Express, and Mongoose
Please consider newer answers that have more up-to-date information as things have changed over the years!
12 Answers
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Can you “ignore” a file in Perforce?
...s first added in release, 2012.1, described on the Perforce blog here:
https://www.perforce.com/blog/new-20121-p4ignore
As it's currently described, you set an environment variable "P4IGNORE" to a filename which contains a list of the files to ignore.
So you can check it out to see how you li...
Convert XML to JSON (and back) using Javascript
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https://github.com/abdmob/x2js - my own library (updated URL from http://code.google.com/p/x2js/):
This library provides XML to JSON (JavaScript Objects) and vice versa javascript conversion functions. The library is very sm...
What is the most elegant way to remove a path from the $PATH variable in Bash?
Or more generally, how do I remove an item from a colon-separated list in a Bash environment variable?
33 Answers
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Newline in JLabel
...eUploader: {
brandingHtml: "Powered by \u003ca href=\"https://imgur.com/\"\u003e\u003csvg class=\"svg-icon\" width=\"50\" height=\"18\" viewBox=\"0 0 50 18\" fill=\"none\" xmlns=\"http://www.w3.org/2000/svg\"\u003e\u003cpath d=\"M46.1709 9.17788C46.1709 8.26454 46.2665 7.94324 4...
how to prevent “directory already exists error” in a makefile when using mkdir
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On UNIX Just use this:
mkdir -p $(OBJDIR)
The -p option to mkdir prevents the error message if the directory exists.
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Grep characters before and after match?
...efore and 4 characters after
$> echo "some123_string_and_another" | grep -o -P '.{0,3}string.{0,4}'
23_string_and
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