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Git, rewrite previous commit usernames and emails
...l alias.change-commits '!'"f() { VAR=\$1; OLD=\$2; NEW=\$3; shift 3; git filter-branch --env-filter \"if [[ \\\"\$\`echo \$VAR\`\\\" = '\$OLD' ]]; then export \$VAR='\$NEW'; fi\" \$@; }; f"
To change the author name:
git change-commits GIT_AUTHOR_NAME "old name" "new name"
or the email for only th...
To ternary or not to ternary? [closed]
...ernary operators as it hard to read and confusing:
int a = b > 10 ? c < 20 ? 50 : 80 : e == 2 ? 4 : 8;
Moreover, when using ternary operator, consider formatting the code in a way that improve readability:
int a = (b > 10) ? some_value
: another_value;
...
Call apply-like function on each row of dataframe with multiple arguments from each row
I have a dataframe with multiple columns. For each row in the dataframe, I want to call a function on the row, and the input of the function is using multiple columns from that row. For example, let's say I have this data and this testFunc which accepts two args:
...
How to save traceback / sys.exc_info() values in a variable?
...()
...
>>> print var
Traceback (most recent call last):
File "<stdin>", line 2, in <module>
ValueError: invalid literal for int() with base 10: 'k'
You should however take a look at the traceback documentation, as you might find there more suitable methods, depending to how...
What's the difference between and in servlet
...
<context:annotation-config> declares support for general annotations such as @Required, @Autowired, @PostConstruct, and so on.
<mvc:annotation-driven /> declares explicit support for annotation-driven MVC controll...
Force HTML5 youtube video
...on :
You have to add the html5=1 in the src attribute of the iframe :
<iframe src="http://www.youtube.com/embed/dP15zlyra3c?html5=1"></iframe>
The video will be displayed as HTML5 if available, or fallback into flash player.
...
How to handle WndProc messages in WPF?
... edited Apr 13 '17 at 17:35
heltonbiker
21.8k1919 gold badges110110 silver badges202202 bronze badges
answered Mar 8 '09 at 22:18
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Java Generics Wildcarding With Multiple Classes
...
Actually, you can do what you want. If you want to provide multiple interfaces or a class plus interfaces, you have to have your wildcard look something like this:
<T extends ClassA & InterfaceB>
See the Generics Tutorial at sun.com, specifically the Bounded Type Parameter...
How to install a private NPM module without my own registry?
...a) when using git repos, you can specify a branch/commit/tag by adding a #<ref> to the end of the git url, eg git://github.com/visionmedia/express.git#v0.0.1; (b) To be safe add "private": true to the package.json of your private repos. This will make sure npm will never let you accidentally p...
Get all column names of a DataTable into string array using (LINQ/Predicate)
...
Try this (LINQ method syntax):
string[] columnNames = dt.Columns.Cast<DataColumn>()
.Select(x => x.ColumnName)
.ToArray();
or in LINQ Query syntax:
string[] columnNames = (from dc in dt.Columns.Cast<DataColumn&...