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Is False == 0 and True == 1 an implementation detail or is it guaranteed by the language?
Is it guaranteed that False == 0 and True == 1 , in Python (assuming that they are not reassigned by the user)? For instance, is it in any way guaranteed that the following code will always produce the same results, whatever the version of Python (both existing and, likely, future ones)?
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Why is inserting in the middle of a linked list O(1)?
...nserting in the middle of a linked list is considered O(1). I would think it would be O(n). Wouldn't you need to locate the node which could be near the end of the list?
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How to disable HTML button using JavaScript?
...ke physically unclickable) an HTML button simply by appending disable to its tag, but not as an attribute, as follows:
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How to render and append sub-views in Backbone.js
...ewhat deep in my application. There are a bunch of ways I could think of initializing, rendering and appending the sub-views, but I'm wondering what common practice is.
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jQuery `.is(“:visible”)` not working in Chrome
...code runs smooth in Firefox, but doesn't seem to work in Chrome. In Chrome it shows .is(":visible") = false even when it is true .
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Avoiding SQL injection without parameters
...rs to safeguard against sql injections and the other guys that don't think it is necessary. Instead they want to replace single apostrophes with two apostrophes in all strings to avoid sql injections. Our databases are all running Sql Server 2005 or 2008 and our code base is running on .NET framewor...
Determine which MySQL configuration file is being used
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If you are on Linux, then start the 'mysqld' with strace, for eg strace ./mysqld.
Among all the other system calls, you will find something like:
stat64("/etc/my.cnf", 0xbfa3d7fc) = -1 ENOENT (No such file or directory)
stat64("/etc/mysql/my.cnf", {st_mode=S_IFR...
Use of .apply() with 'new' operator. Is this possible?
...want to create an object instance (via the new operator), but pass an arbitrary number of arguments to the constructor. Is this possible?
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How to make an immutable object in Python?
Although I have never needed this, it just struck me that making an immutable object in Python could be slightly tricky. You can't just override __setattr__ , because then you can't even set attributes in the __init__ . Subclassing a tuple is a trick that works:
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Truncate Two decimal places without rounding
...ue of 3.4679 and want 3.46, how can I truncate to two decimal places that without rounding up?
21 Answers
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