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Unable to Cast from Parent Class to Child Class
..., that actually is not true.
Let's take a revised start and try proving it by examples.
As we know in .net all castings have two broad categories.
For Value type
For Reference type (in your case its reference type)
Reference type has further three main situational cases in which any scenario c...
How to use string.replace() in python 3.x
...
The replace() method in python 3 is used simply by:
a = "This is the island of istanbul"
print (a.replace("is" , "was" , 3))
#3 is the maximum replacement that can be done in the string#
>>> Thwas was the wasland of istanbul
# Last substring 'is' in istanbul i...
virtualenvwrapper and Python 3
... Didn't quite work for me on OSX with 2.7.8 and 3.4.1 installed side-by-side via brew. Modifying it to "mkvirtualenv --python=`which python3` nameOfEnvironment" worked perfectly, though.
– Chris Doggett
Aug 13 '14 at 14:43
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PowerShell: Setting an environment variable for a single command only
...er executing the command. I've accomplished this for common commands I use by adding functions similar to the following to my PowerShell profile.
function cmd_special()
{
$orig_master = $env:app_master
$env:app_master = 'http://host.example.com'
mycmd $args
$env:app_master = $orig_master
}
...
How to create a directory if it doesn't exist using Node.js?
... doesn't exist.
It should have full permission for the script and readable by others.
17 Answers
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How to drop unique in MySQL?
...que key (rather than the column name). You find the name of the unique key by
mysql> SHOW CREATE TABLE fuinfo;
here you see the name of the unique key, which could be email_2, for example. So...
mysql> DROP INDEX email_2 ON fuinfo;
mysql> DESCRIBE fuinfo;
This should show that the i...
How to get Visual Studio to open Resolve Conflicts window after a TFS Get
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You can re open the Resolve Conflicts window if you closed it by mistake from Team Explorer. Goto: Pending Changes, then from the Actions drop down, select Resolve Conflicts.
From there you can click Get All Conflicts.
Normally VS will prompt you to resolve any conflicts as soon as yo...
C pointer to array/array of pointers disambiguation
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So, for 32 bit systems: int* arr[8]; /* 8x4 bytes allocated, for each pointer / int (*arr)[8]; / 4 bytes allocated, only a pointer */
– George
May 13 '09 at 18:43
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Significance of -pthread flag when compiling
...004-209.pdf is in practice for gcc optimizations, but I sure was impressed by the depth of the review there.
– Pascal Cuoq
Jan 24 '10 at 16:53
2
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Intellij idea subversion checkout error: `Cannot run program “svn”`
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I solved this by uncheking the "Use command-line client" option from Subversion settings.
This works with version 1.6 and 1.7 only. See @Vic's answer for SVN version 1.8.
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