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How do I test if a variable is a number in Bash?
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@Ben do you really want to handle more than one minus sign? I'd make it ^-? rather than ^-* unless you're actually doing the work to handle multiple inversions correctly.
– Charles Duffy
Jun 26 '11 at...
Java 8 stream reverse order
..., e) -> list.add(0, e),
(list1, list2) -> list1.addAll(0, list2));
It's probably possible to write a much more efficient reversing collector using some kind of customized data structure.
UPDATE 2016-01-29
Since this question has gotten a bit of attention recently, I figur...
RegEx: Grabbing values between quotation marks
...gt;>> string = '"Foo Bar" "Another Value"'
>>> print re.findall(r'"(.*?)"', string)
['Foo Bar', 'Another Value']
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Check whether a string contains a substring
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This way is especially preferrable, when you are searching using a variable - this way you won't have to double-escape characters (in this variable string), that are special for regular expressions (like :).
– evgeny9
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Interface or an Abstract Class: which one to use?
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I was trying all day to understand the usages of abstract and interface classes, your post made it all clear. Thanks a lot Alan
– afarazit
May 21 '11 at 12:51
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Using Enums while parsing JSON with GSON
...d "status": "N",, where N=0,1,2,3 - depend on the Status values. So that's all, GSON works fine with the values for the nested enum class. In my case i've parsed a list of Items from json array:
List<Item> items = new Gson().<List<Item>>fromJson(json,
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How to disable an input type=text?
...ay to prevent it is with server side logic.
– Aaron Wallentine
Jul 18 '16 at 21:50
add a comm...
Do I need quotes for strings in YAML?
...uotes unless you have to, and then to use single quotes unless you specifically want to process escape codes.
Update
"Yes" and "No" should be enclosed in quotes (single or double) or else they will be interpreted as TrueClass and FalseClass values:
en:
yesno:
'yes': 'Yes'
'no': 'No'
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Test if element is present using Selenium WebDriver?
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Good call djangofan! I successfully used this strategy by changing the driver timeouts' implicit wait to zero, then changing it back to its previous value.
– emery
May 27 '15 at 17:18
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Run task only if host does not belong to a group
...ut-other-hosts-with-magic-variables :
group_names is a list (array) of all the groups the current host is in.
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