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How do I spool to a CSV formatted file using SQLPLUS?
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Does anyone know how to you turn off echo, the obvious "set echo off" doesn't seem to work with this?
– Quaternion
Nov 1 '18 at 22:39
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View the Task's activity stack
...Destroy=false thumbnailNeeded=false idle=true
waitingVisible=false nowVisible=true
* Hist #7: HistoryRecord{44d174d0 com.android.contacts/.DialtactsContactsEntryActivity}
packageName=com.android.contacts processName=android.process.acore
launchedFromUid=10004 app=ProcessR...
MySQL error: key specification without a key length
...----+
In this case, index selectivity is equal to IS=1/3 = 0.33.
Let us now see what will happen if we increase number of indexed characters to two (N=2).
+---------------+-----------+
| indexedValue | rows |
+---------------+-----------+
| ab | 1,2 |
| ad | 3 ...
ASP.NET: HTTP Error 500.19 – Internal Server Error 0x8007000d
...version, remove the current one and re-install, close IIS and restart IIS, now I can see "URL Rewrite".
– Box Very
Sep 19 '16 at 22:47
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Order data frame rows according to vector with specific order
...the *_join functions in dplyr are really nice. End up using these a lot by now as well
– Rappster
Jun 24 '16 at 9:21
I...
Create list of single item repeated N times
...'string'] * len(columns)
Mutable items
I've used Python for a long time now, and I have never seen a use-case where I would do the above with a mutable instance. Instead, to get, say, a mutable empty list, set, or dict, you should do something like this:
list_of_lists = [[] for _ in columns]
T...
Python Process Pool non-daemonic?
...to custom can raise error: AssertionError: group argument must be None for now.
Here I found a solution that can help:
class NoDaemonProcess(multiprocessing.Process):
# make 'daemon' attribute always return False
@property
def daemon(self):
return False
@daemon.setter
...
fetch from origin with deleted remote branches?
...realized we were advertising the "after" explicitly.
So the documentation now states:
Before fetching, remove any remote-tracking references that no longer exist on the remote
That is because:
When we have a remote-tracking branch named "frotz/nitfol" from a previous fetch, and the upstream now ...
Why isn't sizeof for a struct equal to the sum of sizeof of each member?
... {
char a[3];
short int b;
long int c;
char d[3];
};
Now, you might think that it ought to be possible to pack this
structure into memory like this:
+-------+-------+-------+-------+
| a | b |
+-------+-------+-------+-------+
| b | c ...
Can someone explain in simple terms to me what a directed acyclic graph is?
...uried in complex terminology (if we're asking this question, we might not know graph theory... or even need to know). My variant would be something like "bar-hopping where you can never go to the same bar twice". Although the family-tree example from another answer is probably conceptually simpler...