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How do HTML parses work if they're not using regexp?
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Usually by using a tokeniser. The draft HTML5 specification has an extensive algorithm for handling "real world HTML".
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Using unset vs. setting a variable to empty
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Mostly you don't see a difference, unless you are using set -u:
/home/user1> var=""
/home/user1> echo $var
/home/user1> set -u
/home/user1> echo $var
/home/user1> unset var
/home/user1> echo $var
-bash: var: unbound variable
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How to check if a String is numeric in Java
How would you check if a String was a number before parsing it?
39 Answers
39
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Does static constexpr variable inside a function make sense?
If I have a variable inside a function (say, a large array), does it make sense to declare it both static and constexpr ? constexpr guarantees that the array is created at compile time, so would the static be useless?
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Execute command on all files in a directory
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If no files exist in /dir/, then the loop still runs once with a value of '*' for $file, which may be undesirable. To avoid this, enable nullglob for the duration of the loop. Add this line before the loop shopt -s nullglob ...
Heroku NodeJS http to https ssl forced redirect
...n up and running on heroku with express on node with https,. How do I identify the protocol to force a redirect to https with nodejs on heroku?
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How to efficiently compare two unordered lists (not sets) in Python?
...be considered equal, because they have exactly the same elements, only in different order.
10 Answers
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How do I get java logging output to appear on a single line?
...tS you can write %1$tF %1$tT . Makes it a little bit shorter. I don't know if it's even faster.
– Bruno Eberhard
Dec 28 '14 at 8:47
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How to iterate over the files of a certain directory, in Java? [duplicate]
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If you have the directory name in myDirectoryPath,
import java.io.File;
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File dir = new File(myDirectoryPath);
File[] directoryListing = dir.listFiles();
if (directoryListing != null) {
for (File child : directo...
Grep only the first match and stop
...any given file. But it will still continue to search in other files. Also, if there are two or more matched in the same line, all of them will be displayed.
You can use head -1 to solve this problem:
grep -o -a -m 1 -h -r "Pulsanti Operietur" /path/to/dir | head -1
explanation of each grep optio...