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Usage of protocols as array types and function parameters in swift
...}
let xy = XY(x: 1, y: 2)
let xz = XZ(x: 3, z: 4)
//let xs = [xy, xz] // error
let xs = [AnyX(xy), AnyX(xz)]
xs.forEach { print($0.x) } // 1 3
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How to close a Java Swing application from the code
... threads, your application will not terminate. This should be considered a error (and solving it with System.exit is a very bad idea).
The most common culprits are java.util.Timer and a custom Thread you've created. Both should be set to daemon or must be explicitly killed.
If you want to check fo...
How can I force Powershell to return an array when a call only returns one object?
...eck the data type of the variable...
IF ($ServerIps -isnot [array])
{ <error message> }
ELSE
{ <proceed> }
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How do I fetch lines before/after the grep result in bash?
...e the -B and -A to print lines before and after the match.
grep -i -B 10 'error' data
Will print the 10 lines before the match, including the matching line itself.
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RegEx: Grabbing values between quotation marks
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With python this raises an error: sre_constants.error: cannot refer to open group
– a1an
Jun 12 '15 at 10:43
12
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C++ lambda with captures as a function pointer
...code compiles fine without lambda captures, but there is a type conversion error with lambda capture.
Solution with C++11 is to use std::function (edit: another solution that doesn't require modifying the function signature is shown after this example). You can also use boost::function (which ac...
Array to Hash Ruby
...try this method with a large array, it will fill up the stack and cause an error (an error along the same lines as a stack overflow).
– Ben Lee
Mar 13 '14 at 0:02
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How to check if a file contains a specific string using Bash
...example is incorrect, as it only checks if the exit code was non-0. If any error happens, like the file can't be read, the exit code is also non-0. So you have to do something like ec=$?, and check if it's 0 (found), then if it's 1 (not found), and then if it's something else (fail).
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Allow CORS REST request to a Express/Node.js application on Heroku
...NS request, try to check developer tools console. WebKit logs this kind of errors to web inspector's console.
– Olegas
Nov 24 '12 at 20:13
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Integrating MySQL with Python in Windows
... I installed python 2.7 x64 but while importing MySQLdb I'm getting 'ImportError: No module named _mysql_windows.api' error. pls anyone help me to solve this issue.
– Vilva
Aug 3 '12 at 12:15
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