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Convert a string to regular expression ruby
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150
Looks like here you need the initial string to be in single quotes (refer this page)
>> s...
How do I pass the this context to a function?
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305
Javascripts .call() and .apply() methods allow you to set the context for a function.
var myfu...
How to check if std::map contains a key without doing insert?
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310
Use my_map.count( key ); it can only return 0 or 1, which is essentially the Boolean result you ...
What is the `zero` value for time.Time in Go?
...the following print statement:
fmt.Println(time.Time{})
The output is:
0001-01-01 00:00:00 +0000 UTC
For the sake of completeness, the official documentation explicitly states:
The zero value of type Time is January 1, year 1, 00:00:00.000000000 UTC.
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Simultaneously merge multiple data.frames in a list
....frame(i = c("c","d","a"), l = 7:9, stringsAsFactors=FALSE)
Update June 2018: I divided the answer in three sections representing three different ways to perform the merge. You probably want to use the purrr way if you are already using the tidyverse packages. For comparison purposes below, you'll...
How to get a specific “commit” of a gem from github?
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edited Apr 20 '18 at 21:30
jeffmcc
23922 silver badges99 bronze badges
answered May 25 '11...
How to create file execute mode permissions in Git on Windows?
...Temp\TestRepo>git add foo.sh
C:\Temp\TestRepo>git ls-files --stage
100644 e69de29bb2d1d6434b8b29ae775ad8c2e48c5391 0 foo.sh
As you note, after adding, the mode is 0644 (ie, not executable). However, we can mark it as executable before committing:
C:\Temp\TestRepo>git update-index...
MySQL: how to get the difference between two timestamps in seconds
...and the TIME_TO_SEC() functions as follows:
SELECT TIME_TO_SEC(TIMEDIFF('2010-08-20 12:01:00', '2010-08-20 12:00:00')) diff;
+------+
| diff |
+------+
| 60 |
+------+
1 row in set (0.00 sec)
You could also use the UNIX_TIMESTAMP() function as @Amber suggested in an other answer:
SELECT UNIX_T...
Getting error: Peer authentication failed for user “postgres”, when trying to get pgsql working with
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1077
The problem is still your pg_hba.conf file (/etc/postgresql/9.1/main/pg_hba.conf*).
This li...
How do I convert a String to an InputStream in Java?
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20
StandardCharsets requires minimum API level 19.
– Nantoka
Jan 30 '14 at 15:05
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