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Drop shadow for PNG image in CSS
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If you have >100 images that you want to have drop shadows for, I would suggest using the command-line program ImageMagick. With this, you can apply shaped drop shadows to 100 images just by typing one command! For example:
for i in "*.p...
How to print time in format: 2009‐08‐10 18:17:54.811
..."struct timeval" used by gettimeofday() has microseconds which, divided by 1000 will yield the milliseconds. All those upvotes are really wrong and misleading! Unless someone reports under which architecture you get time details below the second with "struct tm".
– EnzoR
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Purpose of Activator.CreateInstance with example?
...eInstance("MyAssembly", ClassName))
and can then do stuff like:
obj.A = 100;
That's its purpose. It also has many other overloads such as providing a Type instead of the class name in a string. Why you would have a problem like that is a different story. Here's some people who needed it:
Crea...
C# 4.0 optional out/ref arguments
.../ .. do something
if (outResult != null) {
outResult.Result = 100;
}
return value;
}
public void bar ()
{
string str = "bar";
string result;
OptionalOut<int> optional = new OptionalOut<int> ();
// example: call without the optional out parameter
...
How do I extract a sub-hash from a hash?
...
Ruby 2.5 added Hash#slice:
h = { a: 100, b: 200, c: 300 }
h.slice(:a) #=> {:a=>100}
h.slice(:b, :c, :d) #=> {:b=>200, :c=>300}
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Preview an image before it is uploaded
...g the file data in-memory):
<img id="blah" alt="your image" width="100" height="100" />
<input type="file"
onchange="document.getElementById('blah').src = window.URL.createObjectURL(this.files[0])">
Generated URL will be like:
blob:http%3A//localhost/7514bc74-65d4-4...
Where to store global constants in an iOS application?
...ew string everytime the defined value is used.
– jbat100
Jul 19 '13 at 12:32
1
@jbat100 I don't t...
How to create a SQL Server function to “join” multiple rows from a subquery into a single delimited
...vant code from Lance's link on sqlteam.com:
DECLARE @EmployeeList varchar(100)
SELECT @EmployeeList = COALESCE(@EmployeeList + ', ', '') +
CAST(EmpUniqueID AS varchar(5))
FROM SalesCallsEmployees
WHERE SalCal_UniqueID = 1
...
Set attributes from dictionary in python
... self.z="name"
if you want to set the attributes at once
d = {'x':100,'y':300,'z':"blah"}
a = A()
a.__dict__.update(d)
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How to group dataframe rows into list in pandas groupby?
... pd.DataFrame({'a': np.random.randint(0, 60, 600), 'b': [1, 2, 5, 5, 4, 6]*100})
def f(df):
keys, values = df.sort_values('a').values.T
ukeys, index = np.unique(keys, True)
arrays = np.split(values, index[1:])
df2 = pd.DataFrame({'a':ukeys, 'b':[list(a) for a in ...