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Fastest check if row exists in PostgreSQL
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Use the EXISTS key word for TRUE / FALSE return:
select exists(select 1 from contact where id=12)
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How do I get a Cron like scheduler in Python? [closed]
...hedule
import time
def job():
print("I'm working...")
schedule.every(10).minutes.do(job)
schedule.every().hour.do(job)
schedule.every().day.at("10:30").do(job)
while 1:
schedule.run_pending()
time.sleep(1)
Disclosure: I'm the author of that library.
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How can I convert comma separated string into a List
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11 Answers
11
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Map enum in JPA with fixed values?
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169
For versions earlier than JPA 2.1, JPA provides only two ways to deal with enums, by their na...
How can I shuffle the lines of a text file on the Unix command line or in a shell script?
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19 Answers
19
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What is the difference between an int and an Integer in Java and C#?
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edited Mar 18 at 11:25
Fred
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What Xcode keyboard shortcuts do you use regularly? [closed]
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16 Answers
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Python: Get the first character of the first string in a list?
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139
You almost had it right. The simplest way is
mylist[0][0] # get the first character from th...
How to get these two divs side-by-side?
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#parent_div_1, #parent_div_2, #parent_div_3 {
width: 100px;
height: 100px;
border: 1px solid red;
margin-right: 10px;
float: left;
}
.child_div_1 {
float: left;
margin-right: 5px;
}
Check working example at http://jsfiddl...