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find() with nil when there are no records
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173
Yes, just do:
Challenge.find_by_id(10)
For Rails 4 and 5:
Challenge.find_by(id: 10)
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Filter dict to contain only certain keys?
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edited Jan 15 '13 at 21:16
Community♦
111 silver badge
answered Aug 6 '10 at 0:22
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How do I split a string with multiple separators in javascript?
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731
Pass in a regexp as the parameter:
js> "Hello awesome, world!".split(/[\s,]+/)
Hello,awesom...
Reshaping data.frame from wide to long format
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reshape(d,
direction = "long",
varying = list(names(d)[3:7]),
v.names = "Value",
idvar = c("Code", "Country"),
timevar = "Year",
times = 1950:1954)
share
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Python String and Integer concatenation [duplicate]
...kticks) is deprecated in later versions of Python 2, and removed in Python 3. Use the str() function instead.
You can use :
string = 'string'
for i in range(11):
string +=`i`
print string
It will print string012345678910.
To get string0, string1 ..... string10 you can use this as @YOU suggeste...
How do I programmatically force an onchange event on an input?
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answered Apr 15 '16 at 13:47
MiscreantMiscreant
4,47633 gold badges1818 silver badges2121 bronze badges
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View the Task's activity stack
...flg=0x10600000 cmp=com.android.contacts/.DialtactsActivity bnds=[125,640][235,758]}
origActivity=com.android.contacts/.DialtactsContactsEntryActivity
realActivity=com.android.contacts/.DialtactsActivity
lastActiveTime=288203177 (inactive for 14s)
* Hist #8: HistoryRecord{44b87a30 com...
How do I get current date/time on the Windows command line in a suitable format for usage in a file/
...ssue with using date . See @npocmaka's https://stackoverflow.com/a/19799236/8479
28 Answers
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Git Push ERROR: Repository not found
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Raedwald
37.7k2626 gold badges116116 silver badges194194 bronze badges
answered Apr 19 '12 at 19:04
JT.JT.
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SecItemAdd and SecItemCopyMatching returns error code -34018 (errSecMissingEntitlement)
...evice from Xcode I would try to access the keychain but fail due to error -34018. This doesn't match any of the documented keychain error codes and can't be consistently reproduced. (happens maybe 30% of the time, and it's not clear to me why it happens). What makes debugging this problem very diffi...