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what is the difference between ?:, ?! and ?= in regex?
...pply q(?=u)i to quit. The lookahead is positive and is followed by another token. Again, q matches q and u matches u. Again, the match from the lookahead must be discarded, so the engine steps back from i in the string to u. The lookahead was successful, so the engine continues with i. But i cannot ...
Sprintf equivalent in Java
...intStream.
Somehow like this, printing into a string stream:
PrintStream ps = new PrintStream(baos);
ps.printf("there is a %s from %d %s", "hello", 3, "friends");
System.out.println(baos.toString());
baos.reset(); //need reset to write new string
ps.printf("there is a %s from %d %s", "flip", 5, "h...
Unmount the directory which is mounted by sshfs in Mac [closed]
... Use umount, as the docs say (pointed to by the answer of @opsmason).
– Ioannis Filippidis
Apr 10 '15 at 7:41
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Hard reset of a single file
...erything will be a positional argument.. Conventionally, "options" are the tokens like --recursive which can appear in any order, or even be combined together in their short form, like with rm -rf. On the contrary, "positional arguments" are much more like arguments passed to a function in a program...
How to list running screen sessions?
..., that's a screen's flaw)
That's why I instead use a script such as this: ps auxw|grep -i screen|grep -v grep
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CSS Child vs Descendant selectors
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div > p matches ps that have a div parent - <div><p> in your question
div p matches ps that have a div ancestor (parent, grandparent, great grandparent, etc.) - <div><p> and <div><div><p> in your que...
How to temporarily exit Vim and go back
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ps to view foreground processes unix.stackexchange.com/questions/6115/…
– Vlad Vinnikov
Oct 29 '12 at 16:47
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How to get the first word of a sentence in PHP?
...unction (strtok) which can be used to split a string into smaller strings (tokens) based on some separator(s). For the purposes of this thread, the first word (defined as anything before the first space character) of Test me more can be obtained by tokenizing the string on the space character.
<...
Python Nose Import Error
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I had a problem with PS1=${PS1:-} set when activating virtualenv (to overcome errors on unset variables). After removing this and switching to set +u, I had no problems anymore.
– Juuso Ohtonen
Jan 17 '18 at...
How can I set a custom date time format in Oracle SQL Developer?
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It is important to note that the 'AM' format token is removed for the 24-hour format. If both the 'AM' and 'HH24' tokens are used, the 'AM' overrides the 'HH24'.
– macawm
May 27 '16 at 14:42
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