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ALTER TABLE without locking the table?
When doing an ALTER TABLE statement in MySQL, the whole table is read-locked (allowing concurrent reads, but prohibiting concurrent writes) for the duration of the statement. If it's a big table, INSERT or UPDATE statements could be blocked for a looooong time. Is there a way to do a "hot alter", li...
LLVM C++ IDE for Windows
...tion and building with one action.
The only drawback is that it is not ready yet as it lacks of some of the advanced features that LLVM can offer such as Clang analyze and smart auto-completion. The plug-in is also not tested well and may not work perfectly therefore I hope I can get user feedback...
Stop LastPass filling out a form
...
Adding
data-lpignore="true"
to an input field disabled the grey LastPass [...] box for me.
Sourced from LastPass.com
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Under what circumstances are linked lists useful?
...ncurrent real-world usage sample below - that would not be there if @Neil hadn't mentioned FORTRAN. ;-)
For example, ConcurrentDictionary<TKey, TValue> in .NET 4.0 RC use linked lists to chain items that hash to the same bucket.
The underlying data structure for ConcurrentStack<T> is ...
Setting the default value of a DateTime Property to DateTime.Now inside the System.ComponentModel De
...ute because they are just meta information generated at compile time. Just add code to the constructor to initialize the date if required, create a trigger and handle missing values in the database, or implement the getter in a way that it returns DateTime.Now if the backing field is not initialized...
Change the current directory from a Bash script
... function:
#!/bin/bash
#
# this script should not be run directly,
# instead you need to source it from your .bashrc,
# by adding this line:
# . ~/bin/myprog.sh
#
function myprog() {
A=$1
B=$2
echo "aaa ${A} bbb ${B} ccc"
cd /proc
}
The reason is that each process has its own current d...
Internet Explorer 11 disable “display intranet sites in compatibility view” via meta tag not working
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sparrowtsparrowt
1,9371919 silver badges1616 bronze badges
...
How can I add to List
... // Double extends Number
So, given this, what type of object could you add to List foo3 that would be legal after any of the above possible ArrayList assignments:
You can't add an Integer because foo3 could be pointing at a List<Double>.
You can't add a Double because foo3 could be point...
Permission denied (publickey) when deploying heroku code. fatal: The remote end hung up unexpectedly
...
You have to upload your public key to Heroku:
heroku keys:add ~/.ssh/id_rsa.pub
If you don't have a public key, Heroku will prompt you to add one automatically which works seamlessly. Just use:
heroku keys:add
To clear all your previo...
PHP - how to create a newline character?
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theonlygusti
6,93766 gold badges3232 silver badges7373 bronze badges
answered Nov 21 '10 at 14:48
GumboGumbo
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