大约有 44,000 项符合查询结果（耗时：0.0735秒） [XML]
Read user input inside a loop
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107
Read from the controlling terminal device:
read input </dev/tty
more info: http://compgr...
Number of elements in a javascript object
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158
Although JS implementations might keep track of such a value internally, there's no standard w...
Can I make 'git diff' only the line numbers AND changed file names?
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10 Answers
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How do I add a path to PYTHONPATH in virtualenv
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157
You can usually avoid having to do anything with PYTHONPATH by using .pth files. Just put a fi...
Add a column to a table, if it does not already exist
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edited May 2 '18 at 9:22
Jitendra Pancholi
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How to pause a YouTube player when hiding the iframe?
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14 Answers
14
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Hexadecimal To Decimal in Shell Script
... to do it in the shell or with an external program:
With bash:
$ echo $((16#FF))
255
with bc:
$ echo "ibase=16; FF" | bc
255
with perl:
$ perl -le 'print hex("FF");'
255
with printf :
$ printf "%d\n" 0xFF
255
with python:
$ python -c 'print(int("FF", 16))'
255
with ruby:
$ ruby -e '...
How do I download a binary file over HTTP?
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143
The simplest way is the platform-specific solution:
#!/usr/bin/env ruby
`wget http://somedom...
How to do a batch insert in MySQL
I have 1-many number of records that need to be entered into a table. What is the best way to do this in a query? Should I just make a loop and insert one record per iteration? Or is there a better way?
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