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Convert a Python list with strings all to lowercase or uppercase
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Do you know the reason behind why a list comprehension is faster than map?
– Nixuz
Nov 26 '09 at 6:05
6
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Context switches much slower in new linux kernels
...om intel_idle to acpi_idle with just the first boot option, please let me know if the second option, processor.max_cstate did what it was documented to do in the comments so that I can update this answer.
Finally, the last of the three parameters, idle=poll is a real power hog. It will disable C1/C...
Virtual Memory Usage from Java under Linux, too much memory used
...te segment that contains global per-process data for the library (I don't know what the segment with no permissions is; I've only seen it on x64 Linux). The read-only portion of the library can be shared between all processes that use the library; for example, libc has 1.5M of virtual memory space t...
AngularJs “controller as” syntax - clarification?
... controller. In massive html code $parent could be problematic, you don't know where that name comes from.
With controller as you can do:
<body ng-controller="ParentCtrl as parent">
<input ng-model="parent.name" /> {{parent.name}}
<div ng-controller="ChildCtrl as child">...
PHP parse/syntax errors; and how to solve them
...d all that other time wasting crap, when I'm just hoping for a quick edit. Now, if you're developing new features or starting from scratch, then, yes, do it in an IDE. You won't regret taking that bit of extra time at the start to set it up.
– 1934286
Mar 6 '17...
Is “IF” expensive?
... what exactly our teacher said that day and I'm hoping you would probably know.
16 Answers
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How can I make a JPA OneToOne relation lazy
...t bytecode instrumentation. The reason for this is that owner entity MUST know whether association property should contain a proxy object or NULL and it can't determine that by looking at its base table's columns due to one-to-one normally being mapped via shared PK, so it has to be eagerly fetched ...
What is the garbage collector in Java?
...ated in the previous iteration is not being used anymore -- that object is now considered "garbage".
Eventually, we'll start getting a lot of garbage, and memory will be used for objects which aren't being used anymore. If this keeps going on, eventually the Java Virtual Machine will run out of spa...
UICollectionView Set number of columns
I just started learning about UICollectionViews. I'm wondering if anyone knows how to specify the number of columns in a collectionview. The default is set to 3 (iPhone/portrait). I've looked at the documentation and can't seem to find a concise answer.
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Python 3: ImportError “No Module named Setuptools”
...ols. Some Python packages used to use distutils for distribution, but most now use setuptools, a more complete package. Here is a question about the differences between them.
To install setuptools on Debian:
sudo apt-get install python3-setuptools
For an older version of Python (Python 2.x):
su...