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Why do we need tuples in Python (or any immutable data type)?
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immutable objects can allow substantial optimization; this is presumably why strings are also immutable in Java, developed quite separately but about the same time as Python, and just about everything is immutable in truly-functi...
window.close and self.close do not close the window in Chrome
...Awesome Markdown Files, it provides features including Content Outline, Sortable Tables and code block syntax highlight with line number.
I also created this post, any comments are welcome.
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What's the UIScrollView contentInset property for?
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It's used to add padding in UIScrollView
Without contentInset, a table view is like this:
Then set contentInset:
tableView.contentInset = UIEdgeInsets(top: 20, left: 0, bottom: 0, right: 0)
The effect is as below:
Seems to be better, right?
And I write a blog to study the content...
pandas: How do I split text in a column into multiple rows?
...ize of the DataFrame very quickly. In my case, running the code on a ~200M table resulted in ~10G memory (+swap...) usage.
– David Nemeskey
Mar 24 '16 at 16:13
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Code First: Independent associations vs. Foreign key associations?
...ou know what you want it to be. Note that having both does not change your table structure in any way.
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How do I do base64 encoding on iOS?
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#import "NSStringAdditions.h"
static char base64EncodingTable[64] = {
'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P',
'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z', 'a', 'b', 'c', 'd', 'e', 'f',
'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', ...
What is the difference between “long”, “long long”, “long int”, and “long long int” in C++?
... least as much storage as those preceding it in the list.
There's also a table 9 in 7.1.6.2 Simple type specifiers, which shows the "mappings" of the specifiers to actual types (showing that the int is optional), a section of which is shown below:
Specifier(s) Type
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Remove non-ascii character in string
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@AlexanderMills Search for an ascii table - you can see that only characters that has value from zero to 127 are valid. (0x7F is 127 in hex). This code matches all characters that are not in the ascii range and removes them.
– Zaffy
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What is the point of Lookup?
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@KyleBaran Lookup<,> is simply an immutable collection (with no Add method for eg) which has a limited use. Furthermore, its not a general purpose collection in the sense that if you do lookup on a nonexistent key you get an empty sequence rather than an exceptio...
static const vs #define
... The pro and cons are mixed up, I would be very like to see a comparison table.
– Unknown123
Apr 25 '19 at 3:49
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