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Convert char to int in C and C++
...etc, you can write
char a = '4';
int ia = a - '0';
/* check here if ia is bounded by 0 and 9 */
Explanation:
a - '0' is equivalent to ((int)a) - ((int)'0'), which means the ascii values of the characters are subtracted from each other. Since 0 comes directly before 1 in the ascii table (and so on...
Install NPM into home directory with distribution nodejs package (Ubuntu)
I'd like to use the distribution Node.js packages (or the chris-lea ppa for more recent releases) but install NPM to my home directory.
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How can I have a newline in a string in sh?
...STR" # quotes are required here!
Hello
World
Here is an excerpt from the Bash manual page:
Words of the form $'string' are treated specially. The word expands to
string, with backslash-escaped characters replaced as specified by the
ANSI C standard. Backslash escape sequences, if pr...
Check if pull needed in Git
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First use git remote update, to bring your remote refs up to date. Then you can do one of several things, such as:
git status -uno will tell you whether the branch you are tracking is ahead, behind or has diverged. If it says nothing, the local and remote...
How do I fix the indentation of an entire file in Vi?
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=, the indent command can take motions. So, gg to get the start of the file, = to indent, G to the end of the file, gg=G.
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How to grep Git commit diffs or contents for a certain word?
In a Git code repository I want to list all commits that contain a certain word. I tried this
8 Answers
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Regular Expression to reformat a US phone number in Javascript
I'm looking to reformat (replace, not validate - there are many references for validating) a phone number for display in Javascript. Here's an example of some of the data:
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Python Progress Bar
How do I use a progress bar when my script is doing some task that is likely to take time?
33 Answers
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Vim indent xml file
I am learning Vim but I thought this was a simple task but I cannot get it to work. I have browser SO but the solutions are not working for me.
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How do the likely/unlikely macros in the Linux kernel work and what is their benefit?
I've been digging through some parts of the Linux kernel, and found calls like this:
10 Answers
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