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Union Vs Concat in Linq
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110
Union returns Distinct values. By default it will compare references of items. Your items have d...
How do I append text to a file?
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Jon KiparskyJon Kiparsky
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How to backup a local Git repository?
... if we are inside a git repo
`git status 2>&1`
if $?.exitstatus != 0
puts 'fatal: Not a git repository: .git or at least cannot get zero exit status from "git status"'
exit 2
else # git status success
until File::directory?( Dir.pwd + '/' + git_dir_name ) \
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Python argparse command line flags without arguments
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answered Nov 24 '11 at 15:01
JdogJdog
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How to divide flask app into multiple py files?
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edited Aug 16 '12 at 20:56
answered Aug 16 '12 at 20:09
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Two color borders
...utline is inside of the shadow; in FireFox it is outside, so -moz-outline: 0 is useful to ensure that you don't get a gnarly line around your beautiful CSS drop shadow).
.someclass {
border: 1px solid blue;
outline: 1px solid darkblue;
}
Edit: Some people have remarked that outline doesn't ji...
Java system properties and environment variables
...ed Apr 13 '17 at 7:57
informatik01
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answered Aug 14 '11 at 4:30
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B-Tree vs Hash Table
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edited Jun 20 at 9:12
Community♦
111 silver badge
answered Sep 5 '11 at 9:58
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How does Rails keep track of which migrations have run for a database?
... row from schema_migrations.
For example, running a migration file named 20120620193144_create_users.rb will insert a new row with a version of 20120620193144 into the schema_migrations table.
You are free at any point to introduce migrations with earlier versions. Rails will always run any new mi...
How to get last key in an array?
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answered Feb 27 '10 at 17:11
Pascal MARTINPascal MARTIN
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