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How can I concatenate regex literals in JavaScript?
Is it possible to do something like this?
12 Answers
12
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How do you copy the contents of an array to a std::vector in C++ without looping?
...nt part of the program that I need to store for later processing. Since I don't know how many times my function will be called before it is time to process the data, I need a dynamic storage structure, so I chose a std::vector . I don't want to have to do the standard loop to push_back all the ...
advantage of tap method in ruby
...is just creating an instance named user.
If it were:
user = User.new.tap do |u|
u.username = "foobar"
u.save!
end
then that would be immediately clear. A reader would not have to read what is inside the block to know that an instance user is created.
...
When to use AtomicReference in Java?
When do we use AtomicReference ?
8 Answers
8
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How can I rename a database column in a Ruby on Rails migration?
...lumn, :new_column
You'll probably want to create a separate migration to do this. (Rename FixColumnName as you will.):
script/generate migration FixColumnName
# creates db/migrate/xxxxxxxxxx_fix_column_name.rb
Then edit the migration to do your will:
# db/migrate/xxxxxxxxxx_fix_column_name.rb...
Git fetch remote branch
...to checkout 'upstream/develop' which can not be resolved as commit?". Am I doing something wrong?
– Neil Barnwell
Apr 8 '12 at 22:40
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How do I position one image on top of another in HTML?
...
@Me_developer You wouldn't do it this way. You'd use auto margins. w3schools.com/howto/howto_css_image_center.asp
– Craigo
Jan 23 at 8:47
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How can I wait for set of asynchronous callback functions?
...from those 10 ajax calls and then when they have all completed you want to do something. You can do it like this by accumulating the data in an array and keeping track of when the last one has finished:
Manual Counter
var ajaxCallsRemaining = 10;
var returnedData = [];
for (var i = 0; i < 10;...
How can I read numeric strings in Excel cells as string (not numbers)?
What can I do to read the value as string?
20 Answers
20
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How do I quickly rename a MySQL database (change schema name)?
...u username -ppassword old_db -sNe 'show tables' | while read table; \
do mysql -u username -ppassword -sNe "rename table old_db.$table to new_db.$table"; done
OR
for table in `mysql -u root -ppassword -s -N -e "use old_db;show tables from old_db;"`; do mysql -u root -ppassword -s -N -e "use ...