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Adding an identity to an existing column
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You can't alter the existing columns for identity.
You have 2 options,
Create a new table with identity & drop the existing table
Create a new column with identity & drop the existing column
Approach 1. (New table) Here you can retain ...
How to read a (static) file from inside a Python package?
Could you tell me how can I read a file that is inside my Python package?
8 Answers
8
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Inputting a default image in case the src attribute of an html is not valid?
Is there any way to render a default image in an HTML <img> tag, in case the src attribute is invalid (using only HTML)? If not, what would be your lightweight way to work around it?
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Dismissing a Presented View Controller
...heir backs a little here for a potentially kludgy piece of API.
[self dismissViewControllerAnimated:NO completion:nil]
Is actually a bit of a fiddle. Although you can - legitimately - call this on the presented view controller, all it does is forward the message on to the presenting view contr...
Exception thrown in NSOrderedSet generated accessors
On my Lion app, I have this data model:
25 Answers
25
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Ruby on Rails vs ASP.NET MVC 3 for a .NET Guy? [closed]
I am very new to RoR and I want to select between APS.NET MVC3 and RoR. C# is sure easier for me as I have been doing it for so long but I am wondering if there is any point to consider using RoR over .MVC to develop a real world website?
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How can I get the URL of the current tab from a Google Chrome extension?
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Use chrome.tabs.query() like this:
chrome.tabs.query({active: true, lastFocusedWindow: true}, tabs => {
let url = tabs[0].url;
// use `url` here inside the callback because it's asynchronous!
});
This requires that you request access to the c...
What is the easiest/best/most correct way to iterate through the characters of a string in Java?
...ng and use charAt() to get each character to examine it. Since the String is implemented with an array, the charAt() method is a constant time operation.
String s = "...stuff...";
for (int i = 0; i < s.length(); i++){
char c = s.charAt(i);
//Process char
}
That's what I would...
The role of #ifdef and #ifndef
In this what is the role of #ifdef and #ifndef , and what's the output?
4 Answers
4...
Pandas - Get first row value of a given column
This seems like a ridiculously easy question... but I'm not seeing the easy answer I was expecting.
7 Answers
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