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Javascript equivalent of Python's zip function
...date:
Here's a snazzier Ecmascript 6 version:
zip= rows=>rows[0].map((_,c)=>rows.map(row=>row[c]))
Illustration equiv. to Python{zip(*args)}:
> zip([['row0col0', 'row0col1', 'row0col2'],
['row1col0', 'row1col1', 'row1col2']]);
[["row0col0","row1col0"],
["row0col1","row1col1"...
Error in finding last used cell in Excel with VBA
...on.CountA(.Cells) <> 0 Then
lastrow = .Cells.Find(What:="*", _
After:=.Range("A1"), _
Lookat:=xlPart, _
LookIn:=xlFormulas, _
SearchOrder:=xlByRows, _
SearchDirection:=xlPrevio...
Trying to login to RDP using AS3
...ion sendMcsData(): ByteArray {
trace("Secure.sendMcsData");
var num_channels: int = 2;
var dataBuffer:ByteArray=new ByteArray(); //RdpPacket_Localised dataBuffer = new RdpPacket_Localised(512);
// it's better to build the data buffer in the function, as in java, otherwise you can rec...
PHP Get Site URL Protocol - http vs https
...olutions are quite messy; this is how I would do it:
$protocol = stripos($_SERVER['SERVER_PROTOCOL'],'https') === 0 ? 'https://' : 'http://';
...or even without condition if you prefer:
$protocol = strtolower(substr($_SERVER["SERVER_PROTOCOL"],0,strpos( $_SERVER["SERVER_PROTOCOL"],'/'))).'://';
...
Find object in list that has attribute equal to some value (that meets any condition)
...
next((x for x in test_list if x.value == value), None)
This gets the first item from the list that matches the condition, and returns None if no item matches. It's my preferred single-expression form.
However,
for x in test_list:
if x.value ...
Pandas - How to flatten a hierarchical index in columns
... would be to set the columns to the top level:
df.columns = df.columns.get_level_values(0)
Note: if the to level has a name you can also access it by this, rather than 0.
.
If you want to combine/join your MultiIndex into one Index (assuming you have just string entries in your columns) you cou...
How do I check for C++11 support?
...
There is a constant named __cplusplus that C++ compilers should set to the version of the C++ standard supported see this
#if __cplusplus <= 199711L
#error This library needs at least a C++11 compliant compiler
#endif
It is set to 199711L in V...
How to delete (not cut) in Vim?
...
Use the "black hole register", "_ to really delete something: "_d.
Use "_dP to paste something and keep it available for further pasting.
For the second question, you could use <C-o>dw. <C-o> is used to execute a normal command without leaving ...
Dictionaries and default values
...collections import defaultdict
a = defaultdict(lambda: "default", key="some_value")
a["blabla"] => "default"
a["key"] => "some_value"
You can pass any ordinary function instead of lambda:
from collections import defaultdict
def a():
return 4
b = defaultdict(a, key="some_value")
b['absent...
Is there a use-case for singletons with database access in PHP?
... second monitor, a second database, a second server--whatever.
When this happens, if you have used a static class you're in for a much worse refactor than if you had used a singleton. A singleton is an iffy pattern in itself, but it converts fairly easily to an intelligent factory pattern--can eve...