大约有 3,000 项符合查询结果（耗时：0.0185秒） [XML]
Rearrange columns using cut
...
What version? perl -ae print works as cat for me
– pwes
Jan 20 '17 at 12:33
add a comment
|
...
How to extract the first two characters of a string in shell scripting?
...rom a file
To leave first two chars, just remove columns starting from 3
cat file | colrm 3
share
|
improve this answer
|
follow
|
...
What does “Object reference not set to an instance of an object” mean? [duplicate]
...for myPet == null... AND for myPet.PetType == null
if ( myPet.PetType == "cat" ) <--- fall down go boom!
share
|
improve this answer
|
follow
|
...
Why Large Object Heap and why do we care?
...on why Microsoft pins large objects in the memory and proposes LOH.
BTW, according to this post, LOH usually doesn't generate memory fragment problems.
share
|
improve this answer
|
...
How to select rows that have current day's timestamp?
... in the index anyway. So, it doesn't hurt to explicitly add it (and it may catch some optimizer blind spots). It's certainly not relevant in this case/query.
– ypercubeᵀᴹ
Nov 5 '13 at 12:52
...
Bash ignoring error for a particular command
...
The solution:
particular_script || true
Example:
$ cat /tmp/1.sh
particular_script()
{
false
}
set -e
echo one
particular_script || true
echo two
particular_script
echo three
$ bash /tmp/1.sh
one
two
three will be never printed.
Also, I want to add that when pipefai...
What is the difference between a process and a thread?
...
This answer is way better than the accepted answer because it talks about the ideal of processes and threads: They should be separate things with separate concerns. The fact is, most operating systems have history that goes back farther than the invention o...
Getting the last argument passed to a shell script
...=$BASH_ARGV # official built-in (but takes more typing :)
That's it.
$ cat lastarg
#!/bin/bash
# echo the last arg given:
_last=${!#}
echo $_last
_last=$BASH_ARGV
echo $_last
for x; do
echo $x
done
Output is:
$ lastarg 1 2 3 4 "5 6 7"
5 6 7
5 6 7
1
2
3
4
5 6 7
...
使用App Inventor 2 控制物联网设备/低功耗蓝牙设备(BLE) · App Inventor 2 中文网
... Rate Monitor”, Arduino, 2016. [Online].
Available: https://www.arduino.cc/en/Tutorial/Genuino101CurieBLEHeartRateMonitor.
[10] Rowberg, J. ”[REFERENCE]: BLE master/slave, GATT client/server, and data RX/TX basics”, Bluegiga Technologies, 2016. [Online]. Available: https://bluegiga.zendes...
Sorting arrays in NumPy by column
...
I suppose this works: a[a[:,1].argsort()]
This indicates the second column of a and sort it based on it accordingly.
share
|
improve this answer
|
fol...