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Difference between exit(0) and exit(1) in Python
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0 and 1 are the exit codes.
exit(0) means a clean exit without any errors / problems
exit(1) means there was some issue / error / problem and that is why the program is exiting.
This is not Python specific and is pretty common. A non-zero exit code is treated as an abnormal exit, and at ti...
Difference between “or” and || in Ruby? [duplicate]
...o_this or do_that idiom, where do_this returns false or nil if there is an error and only then is do_that executed instead. (Analogous, there is also the do_this and then_do_that idiom.)
Examples:
download_file_via_fast_connection or download_via_slow_connection
download_latest_currency_rates and ...
Are there strongly-typed collections in Objective-C?
...ion of type 'NSString *'
And in Swift code, they will produce a compiler error:
var str: String = arr[0]
var num: Int = arr[0] //Error 'String' is not convertible to 'Int'
Lightweight Generics are intended to be used with NSArray, NSDictionary and NSSet, but you can also add them to your own cl...
Passing an array to a query using a WHERE clause
... must be at least one value inside the parenthesis or MySQL will return an error; this equates to making sure that our input array has at least one value. To help prevent against SQL injection attacks, first generate a ? for each input item to create a parameterized query. Here I assume that the arr...
Why does Google prepend while(1); to their JSON responses?
...t without any processing, resulting in either an infinite loop or a syntax error.
This does not address the issue of cross-site request forgery.
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Semicolon before self-invoking function? [duplicate]
...nExpression)()
In my case it isn't about "safety" or trying to "catch an error" (honestly, if your style is to use semi-colons and you forget a semi-colon, then you've already created the error elsewhere and writing a ; at the start for "safety" is hogwash). No; in my case it is done for consisten...
How to get Ruby / Homebrew / RVM to work on Yosemite?
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This error can easily be fixed in the following steps:
1) Open terminal
2) Type nano /usr/local/Library/brew.rb
3) In the first line change “1.8″ to “Current”, so it should look like this:
#!/System/Library/Frameworks/...
Compare floats in php
...ause it looks small, this comparison will return true in alot of precision errors when the numbers are small. A correct way would be to check if the relative error is smaller than the epsilon. abs($a-$b) > abs(($a-$b)/$b)
– Piet Bijl
Jun 21 '13 at 13:18
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How do I unlock a SQLite database?
...qlite3: sqlite> .dump PRAGMA foreign_keys=OFF; BEGIN TRANSACTION; /**** ERROR: (5) database is locked *****/ ROLLBACK; -- due to errors
– woky
Nov 28 '14 at 22:40
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PHP cURL custom headers
... $season_data = curl_exec($ch);
if (curl_errno($ch)) {
print "Error: " . curl_error($ch);
exit();
}
// Show me the result
curl_close($ch);
$json= json_decode($season_data, true);
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