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How to automatically select all text on focus in WPF TextBox?
If I call SelectAll from a GotFocus event handler, it doesn't work with the mouse - the selection disappears as soon as mouse is released.
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Change Placeholder Text using jQuery
...pe=textarea], input[type=password], textarea").each(function(ev)
{
if(!$(this).val()) {
$(this).attr("placeholder", "Type your answer here");
}
});
});
Copy and paste this code in your js file, this will change all placeholder text from whole site.
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Find a pair of elements from an array whose sum equals a given number
... its index.
hash(arr[i]) = i
end-for
for i=0 to arr.length - 1 do
# if K-th element exists and it's different then we found a pair
if hash(K - arr[i]) != i
print "pair i , hash(K - arr[i]) has sum K"
end-if
end-for
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How to read from standard input in the console?
...canln, because it parses a string already in memory instead of from stdin. If you want to do something like what you were trying to do, replace it with fmt.Scanf("%s", &ln)
If this still doesn't work, your culprit might be some weird system settings or a buggy IDE.
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How do I compare version numbers in Python?
...lking a directory that contains eggs to add those eggs to the sys.path . If there are two versions of the same .egg in the directory, I want to add only the latest one.
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ROW_NUMBER() in MySQL
... this and most other groupwise-maximum solutions will return multiple rows if more than one row has the same col1,col2,col3. If that's a problem you may need some post-processing.)
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How to avoid “RuntimeError: dictionary changed size during iteration” error?
....x calling keys makes a copy of the key that you can iterate over while modifying the dict:
for i in d.keys():
Note that this doesn't work in Python 3.x because keys returns an iterator instead of a list.
Another way is to use list to force a copy of the keys to be made. This one also works in P...
#if Not Debug in c#?
...
You would need to use:
#if !DEBUG
// Your code here
#endif
Or, if your symbol is actually Debug
#if !Debug
// Your code here
#endif
From the documentation, you can effectively treat DEBUG as a boolean. So you can do complex tests like:
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Read and write a String from text file
...how to read and write a simple string. You can test it on a playground.
Swift 3.x - 5.x
let file = "file.txt" //this is the file. we will write to and read from it
let text = "some text" //just a text
if let dir = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask).first {
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Ask for User Permission to Receive UILocalNotifications in iOS 8
I have set up local notifications in the App Delegate Using this:
5 Answers
5
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