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How to compare strings in Bash
... true.
(
[ "$x" == "valid" ]
&&
echo "valid"
)
||
echo "invalid"
Now, when it is evaluated, the first is checked. If it is false, than the second operand of the logic and && after it is not relevant. The first is not true, so it can not be the first and the second be true, anyway.
...
Hard reset of a single file
...low command will get MyFile two commits previous to the last one. You need now the -s (--source) option since now you use master~2 and not master (the default) as you restore source:
git restore -s master~2 pathTo/MyFile
You can also get the file from other branch!
git restore -s my-feature-bran...
How do you find out the type of an object (in Swift)?
...es, it's useful to be able to actually find out what type something is. I know the debugger can show you some type information, and you can usually rely on type inference to get away with not specifying the type in those situations, but still, I'd really like to have something like Python's type()
...
Can scrapy be used to scrape dynamic content from websites that are using AJAX?
... a JSON file:
Which presents all the information I'm looking for.
From now, I must implement all this knowledge in scrapy. Let's define the spider for this purpose:
class spider(BaseSpider):
name = 'RubiGuesst'
start_urls = ['http://www.rubin-kazan.ru/guestbook.html']
def parse(sel...
Biggest advantage to using ASP.Net MVC vs web forms
...ccurate for the MVC side, a lot of them are being integrated into WebForms now.
– rtpHarry
Mar 4 '11 at 13:18
Link to ...
apc vs eaccelerator vs xcache
...
Success. It's 3 years old now. Ewwww.
– Swader
Nov 30 '13 at 13:19
3
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How to concatenate items in a list to a single string?
...
It's very useful for beginners to know
why join is a string method.
It's very strange at the beginning, but very useful after this.
The result of join is always a string, but the object to be joined can be of many types (generators, list, tuples, etc).
.jo...
hasNext in Python iterators?
...
@Giorgio, there is no way to know whether another element exists without executing the code that generates it (you don't know whether the generator will execute yield or not). It is, of course, not difficult to write an adaptor that stores the result of n...
How can I convert a DateTime to the number of seconds since 1970?
...e, there's a really convenient feature:
long unixSeconds = DateTimeOffset.Now.ToUnixTimeSeconds();
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OSX - How to auto Close Terminal window after the “exit” command executed.
When I'm done with Terminal, I want to exit it. Right now, I have three options:
14 Answers
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