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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 ...
Delete with Join in MySQL
...n a row, it is going to run that query inside IN. That means, if there are 100 rows that needs to be checked against that WHERE, that subquery is going to be run 100 times. Whereas a JOIN will only run ONCE. So, as your db gets bigger and bigger, that query is going to take longer and longer to fini...
How to avoid soft keyboard pushing up my layout? [duplicate]
...tRootView().getHeight() - (r.bottom - r.top);
if (heightDiff > 100) { // if more than 100 pixels, its probably a keyboard...
//ok now we know the keyboard is up...
view_one.setVisibility(View.GONE);
view_two.setVisibility(View.GONE);
} else {
...
How to save an HTML5 Canvas as an image on a server?
...ntext.beginPath();
context.moveTo(170, 80);
context.bezierCurveTo(130, 100, 130, 150, 230, 150);
context.bezierCurveTo(250, 180, 320, 180, 340, 150);
context.bezierCurveTo(420, 150, 420, 120, 390, 100);
context.bezierCurveTo(430, 40, 370, 30, 340, 50);
context.bezierCurveTo(320, 5, 250, ...
UITextView that expands to text using auto layout
... multiplier:0.f
constant:100];
[self addConstraint:_descriptionHeightConstraint];
In the setBounds method, I then changed the value of the constant.
-(void) setBounds:(CGRect)bounds
{
[super setBounds:bounds];
_descriptionTextView.frame ...
Efficient paging in SQLite with millions of records
...T *
FROM MyTable
WHERE SomeColumn > LastValue
ORDER BY SomeColumn
LIMIT 100;
(This is explained with more detail on the SQLite wiki.)
When you have multiple sort columns (and SQLite 3.15 or later), you can use a row value comparison for this:
SELECT *
FROM MyTable
WHERE (SomeColumn, OtherColu...