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What's the complete range for Chinese characters in Unicode?
...cters from the CJKUI Ext B block.
Code points U+20000 to U+2A6D6. Unicode 3.1 (2001).
U+20000 - U+215FF
U+21600 - U+230FF
U+23100 - U+245FF
U+24600 - U+260FF
U+26100 - U+275FF
U+27600 - U+290FF
U+29100 - U+2A6DF
3) 4149 characters from the CJKUI Ext C block.
Code points U+2A700 to U+2B734. Un...
Add Bootstrap Glyphicon to Input Box
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Here is how I did it using only the default bootstrap CSS v3.3.1:
<div class="form-group">
<label class="control-label">Start:</label>
<div class="input-group">
<input type="text" class="form-control" aria-describedby="start-date">
...
Is it worth using Python's re.compile?
...h("[0-9]{3}-[0-9]{3}-[0-9]{4}", "123-123-1234")'; done
1 loops, best of 3: 3.1 usec per loop
10 loops, best of 3: 2.41 usec per loop
100 loops, best of 3: 2.24 usec per loop
1000 loops, best of 3: 2.21 usec per loop
10000 loops, best of 3: 2.23 usec per loop
100000 loops, best of 3: 2.24 usec per lo...
List comprehension rebinds names even after scope of comprehension. Is this right?
... Python 2.6 has list comprehensions only as does Python 3.0. 3.1 added set and dictionary comprehensions and these were ported to 2.7. Sorry if that was not clear. It was meant to note a limitation to another answer, and which versions it applies to is not entirely straightforward.
...
Printing a variable memory address in swift
...oOpaque())
Prints the memory address of someVar.
(thanks to @Ying)
Swift 3.1:
print(Unmanaged<AnyObject>.passUnretained(someVar as AnyObject).toOpaque())
Prints the memory address of someVar.
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When would I use Task.Yield()?
...t the await Task.Delay(1) is enough to prevent it. (Console App, .NET Core 3.1, C# 8)
– Theodor Zoulias
May 19 at 18:45
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Catch multiple exceptions at once?
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Joseph DaigleJoseph Daigle
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How do you write a migration to rename an ActiveRecord model and its table in Rails?
...had to go and rename the model declaration file manually.
Edit:
In Rails 3.1 & 4, ActiveRecord::Migration::CommandRecorder knows how to reverse rename_table migrations, so you can do this:
class RenameOldTableToNewTable < ActiveRecord::Migration
def change
rename_table :old_table_nam...
What does “default” mean after a class' function declaration?
... exception specification as the implicit declaration (18.4), then
(3.1) — if the function is explicitly defaulted on its first declaration, it is defined as deleted;
(3.2) — otherwise, the program is ill-formed.
4
[ Example:
struct S {
constexpr S() = default; /...
What is “2's Complement”?
... in binary using twos complement notation.
If the number is negative then
3.1 find the complement (invert 0's and 1's)
e.g. -5 is 0101 so finding the complement is 1010
3.2 Add 1 to the complement 1010 + 1 = 1011.
Therefore, -5 in two's complement is 1011.
So, what if you wanted to do 2 + ...