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How can I profile C++ code running on Linux?
...bugger while it's being subjectively slow, there's a simple way to find performance problems.
Just halt it several times, and each time look at the call stack. If there is some code that is wasting some percentage of the time, 20% or 50% or whatever, that is the probability that you will catch it i...
Adding IN clause List to a JPA Query
...The objects must match the type of the field. .toString() is no substitute for class String
– dube
Mar 21 '14 at 10:47
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How to RedirectToAction in ASP.NET MVC without losing request data
Using ASP.NET MVC there are situations (such as form submission) that may require a RedirectToAction .
6 Answers
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Can a class member function template be virtual?
...ne and the compiler cannot generate the appropriate instance anymore. Therefore you cannot have virtual member function templates.
However, there are a few powerful and interesting techniques stemming from combining polymorphism and templates, notably so-called type erasure.
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How do Trigonometric functions work?
...re periodic, so you need to reduce arguments down to a standard interval. For starters, you could reduce angles to be between 0 and 360 degrees. But by using a few identities, you realize you could get by with less. If you calculate sines and cosines for angles between 0 and 45 degrees, you can bo...
How to get the text node of an element?
...uery("*").each(function() { console.log(this.nodeType); }) and I got 1 for all the node types.
– Batandwa
Jan 6 '14 at 6:51
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How to use git bisect?
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The idea behind git bisect is to perform a binary search in the history to find a particular regression. Imagine that you have the following development history:
... --- 0 --- 1 --- 2 --- 3 --- 4* --- 5 --- current
You know that your program is not working p...
How can I capture the result of var_dump to a string?
... Using output buffering will most likely have a negative effect on performance here. It also can get really messy if you need to look at multiple variables during the execution of a complex script.
– selfawaresoup
Dec 27 '09 at 16:45
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Permission denied (publickey) when SSH Access to Amazon EC2 instance [closed]
...keypair?
Trying to connect with the wrong username. ubuntu is the username for the ubuntu based AWS distribution, but on some others it's ec2-user (or admin on some Debians, according to Bogdan Kulbida's answer)(can also be root, fedora, see below)
Trying to connect the wrong host. Is that the righ...
How to change an application icon programmatically in Android?
...om facebook found a work around - somehow. Today, I found a way that works for me. Not perfect (see remarks at the end of this answer) but it works!
Main idea is, that I update the icon of my app's shortcut, created by the launcher on my home screen. When I want to change something on the shortcut-...