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Insert into a MySQL table or update if exists
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I know all of you allude to this, but I want to be explicit for others. If the ID you insert is NOT the PRIMARY KEY or UNIQUE, then this will not work. This didn't initially work for me because my ID was not unique.
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Firing a double click event from a WPF ListView item using MVVM
...art (workflow). Furthermore, you are able to unit test the logic part.
I know enough scenarios where you have to write code behind because data binding is not a solution to everything. In your scenario I would handle the DoubleClick event in the code behind file and delegate this call to the ViewMo...
Can an ASP.NET MVC controller return an Image?
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For those that are coming into this question now, this was the solution that worked best for me.
– Clarence Klopfstein
Dec 25 '09 at 5:09
179
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Which is the preferred way to concatenate a string in Python?
...esulting string is a million characters long, appending was still faster.
Now let's try with appending a thousand character long string a hundred thousand times:
a += b:
0.41823482513427734
a.append(b):
0.010656118392944336
The end string, therefore, ends up being about 100MB long. That was pret...
How do you update Xcode on OSX to the latest version?
...ode is currently version 7.2. But need 7.3 to develop for my iPhone which now is on version 9.3 of iOS.
– Alyoshak
Mar 29 '16 at 14:31
23
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How to list variables declared in script in bash?
... You edited while I was posting. Nice call with the -o posix now a diff will only contain the variables.
– ezpz
Aug 20 '09 at 10:50
8
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What's the difference between Protocol Buffers and Flatbuffers?
...ty good. The open source gaming library cocos2d-x is using it successfully now. I think Flatbuffer has passed the experimental phase
– user18853
Jan 3 '16 at 17:22
3
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R apply function with multiple parameters
I have a function f(var1, var2) in R. Suppose we set var2 = 1 and now I want to apply the function f() to the list L . Basically I want to get a new list L* with the outputs
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How to compare objects by multiple fields
...to the fields by using Strings instead (no typesafety, auto-refactorings). Now if a field is renamed, the compiler won’t even report a problem. Moreover, because this solution uses reflection, the sorting is much slower.
Getting there: Sorting with Google Guava’s ComparisonChain
Collections.so...
Replace a value if null or undefined in JavaScript
...ave a requirement to apply the ?? C# operator to JavaScript and I don't know how.
Consider this in C#:
5 Answers
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