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Quick-and-dirty way to ensure only one instance of a shell script is running at a time
...the lock to act on, there is no meaningful data going into it. The exit is from the part inside the ( ). When the subprocess ends, the lock is automatically released, because there is no process holding it.
– clacke
Jun 18 '15 at 10:46
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What's the best way to parse command line arguments? [closed]
...y cool module for argument parsing called docopt. Here is an example taken from its documentation:
"""Naval Fate.
Usage:
naval_fate.py ship new <name>...
naval_fate.py ship <name> move <x> <y> [--speed=<kn>]
naval_fate.py ship shoot <x> <y>
naval_...
What is an unsigned char?
In C/C++, what an unsigned char is used for? How is it different from a regular char ?
17 Answers
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ruby inheritance vs mixins
...rsion models the entities and properties much more neatly. Truck
descends from Vehicle (which makes sense), whereas SelfPropelling is a characteristic of vehicles (at least, all those we care about in this model of the world)—a characteristic that is passed on to trucks by virtue of Truck being a...
How do I put my website's logo to be the icon image in browser tabs?
..." href="favicon.ico" />
</head>
If you want to see the favicon from any website, just write www.url.com/favicon.ico and you'll (probably) see it. Stackoverflow's favicon is 16x16 pixels and Wikipedia is 32x32.
*: There's even a browser problem with no filesize limit. You could easily cr...
How to get the current date and time
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From Date doc: As of JDK 1.1, the Calendar class should be used to convert between dates and time fields and the DateFormat class should be used to format and parse date strings.
– Paolo M
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Converting array to list in Java
...tic class defined inside java.util.Arrays. So if we add or remove elements from the returned list, an UnsupportedOperationException will be thrown. So we should go with list22 when we want to modify the list. If we have Java8 then we can also go with list23.
To be clear list21 can be modified in sen...
What is the best CSS Framework and are they worth the effort?
...u can include a base library/framework and then call functions and objects from it to do higher-level work. All a CSS framework can give you is declarative rules: some default browser-rule-reset stuff, some class styles to be forced to author your page to, and layout rules using 'float' and 'clear'....
How can I force clients to refresh JavaScript files?
...hem to do a ctrl F5 refresh to ensure that they get the up-to-date files from the server, but it would be preferable to handle this before that time.
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Disable intellij indexing on specific folder
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This also excludes the file from a lot of other things. I don't want to exclude the file from the project - just the index. I still want the file to appear in the list of changed files so i can commit the file (or view diffs or whatever)
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