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Setting the selected value on a Django forms.ChoiceField
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116
Try setting the initial value when you instantiate the form:
form = MyForm(initial={'max_numb...
Concurrent vs serial queues in GCD
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217
A simple example: you have a block that takes a minute to execute. You add it to a queue from t...
PHP cURL vs file_get_contents
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129
file_get_contents() is a simple screwdriver. Great for simple GET requests where the header, H...
Finding three elements in an array whose sum is closest to a given number
Given an array of integers, A 1 , A 2 , ..., A n , including negatives and positives, and another integer S. Now we need to find three different integers in the array, whose sum is closest to the given integer S. If there exists more than one solution, any of them is ok.
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Sass .scss: Nesting and multiple classes?
...ements and -classes:
.element{
&:hover{ ... }
&:nth-child(1){ ... }
}
However, you can place the & at virtually any position you like*, so the following is possible too:
.container {
background:red;
#id &{
background:blue;
}
}
/* compiles to: */
.conta...
Make HTML5 video poster be same size as video itself
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13 Answers
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Piping both stdout and stderr in bash?
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172
(Note that &>>file appends to a file while &> would redirect and overwrite a ...
iOS 6 apps - how to deal with iPhone 5 screen size? [duplicate]
...under the Summary section, look for Launch Images. The image has to be 640x1136 pixels in size. Here's a screenshot of where to find it, if that helps.
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Is this a “good enough” random algorithm; why isn't it used if it's faster?
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14 Answers
14
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There can be only one auto column
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121
My MySQL says "Incorrect table definition; there can be only one auto column and it must be de...