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How do I sort a vector of pairs based on the second elem>me m>nt of the pair?
...est solution is very easy to write thanks to lambdas that can now have param>me m>ters of type auto. This is my current favorite solution
std::sort(v.begin(), v.end(), [](auto &left, auto &right) {
return left.second < right.second;
});
Just use a custom comparator (it's an optional 3...
How do I partially update an object in MongoDB so the new object will overlay / m>me m>rge with the exist
Given this docum>me m>nt saved in MongoDB
17 Answers
17
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Detect browser or tab closing
... I don't think you can natively detect a pure close in Javascript. Correct m>me m> if I'm wrong here.
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Adding placeholder text to textbox
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Wouldn't that just be som>me m>thing like this:
Textbox myTxtbx = new Textbox();
myTxtbx.Text = "Enter text here...";
myTxtbx.GotFocus += GotFocus.EventHandle(RemoveText);
myTxtbx.LostFocus += LostFocus.EventHandle(AddText);
public void RemoveText(obj...
Is there a Java API that can create rich Word docum>me m>nts? [closed]
I have a new app I'll be working on where I have to generate a Word docum>me m>nt that contains tables, graphs, a table of contents and text. What's a good API to use for this? How sure are you that it supports graphs, ToCs, and tables? What are som>me m> hidden gotcha's in using them?
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How to download HTTP directory with all files and sub-directories as they appear on the online files
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Solution:
wget -r -np -nH --cut-dirs=3 -R index.html http://hostnam>me m>/aaa/bbb/ccc/ddd/
Explanation:
It will download all files and subfolders in ddd directory
-r : recursively
-np : not going to upper directories, like ccc/…
-nH : not saving files to hostnam>me m> folder
--cut-dirs=3 : bu...
Swift: Testing optionals for nil
...ta 5, they no longer let you do:
var xyz : NSString?
if xyz {
// Do som>me m>thing using `xyz`.
}
This produces an error:
does not conform to protocol 'BooleanType.Protocol'
You have to use one of these forms:
if xyz != nil {
// Do som>me m>thing using `xyz`.
}
if let xy = xyz {
// Do som...
How to return a result from a VBA function
...
For non-object return types, you have to assign the value to the nam>me m> of your function, like this:
Public Function test() As Integer
test = 1
End Function
Example usage:
Dim i As Integer
i = test()
If the function returns an Object type, then you must use the Set keyword like this:...
TSQL - How to use GO inside of a BEGIN .. END block?
...nerating a script for automatically migrating changes from multiple developm>me m>nt databases to staging/production. Basically, it takes a bunch of change-scripts, and m>me m>rges them into a single script, wrapping each script in a IF whatever BEGIN ... END statem>me m>nt.
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How to check if hex color is “too black”?
...ters of the hex value to pull this off. It's working, but it's switching som>me m> legitimately "light" colors too.
8 Answers
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