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Which is faster: multiple single INSERTs or one multiple-row INSERT?
... Inserting indexes: (1 × number of indexes)
Closing: (1)
From this it should be obvious, that sending one large statement will save you an overhead of 7 per insert statement, which in further reading the text also says:
If you are inserting many rows from the same client at the same time...
What is your single most favorite command-line trick using Bash? [closed]
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Renaming/moving files with suffixes quickly:
cp /home/foo/realllylongname.cpp{,-old}
This expands to:
cp /home/foo/realllylongname.cpp /home/foo/realllylongname.cpp-old
sh...
How to read a local text file?
I’m trying to write a simple text file reader by creating a function that takes in the file’s path and converts each line of text into a char array, but it’s not working.
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Clicking a button within a form causes page refresh
I have a form in Angular that has two buttons tags in it. One button submits the form on ng-click . The other button is purely for navigation using ng-click . However, when this second button is clicked, AngularJS is causing a page refresh which triggers a 404. I’ve dropped a breakpoint in the f...
Converting camel case to underscore case in ruby
...follow
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edited Jun 28 '14 at 17:23
Paweł Gościcki
7,05755 gold badges5555 silver badges7474 bronze badges
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How do I make this file.sh executable via double click?
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By default, *.sh files are opened in a text editor (Xcode or TextEdit). To create a shell script that will execute in Terminal when you open it, name it with the “command” extension, e.g., file.command. By default, these are sent to Terminal, which will execute the f...
How does database indexing work? [closed]
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Why is it needed?
When data is stored on disk-based storage devices, it is stored as blocks of data. These blocks are accessed in their entirety, making them the atomic disk access operation. Disk blocks are structured in much the ...
Restarting cron after changing crontab file?
... whenever a crontab file is modified
But if you just want to make sure its done anyway,
sudo service cron reload
or
/etc/init.d/cron reload
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Round a double to 2 decimal places [duplicate]
If the value is 200.3456 , it should be formatted to 200.34 .
If it is 200 , then it should be 200.00 .
13 Answers
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How to check if a string contains text from an array of substrings in JavaScript?
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There's nothing built-in that will do that for you, you'll have to write a function for it.
If you know the strings don't contain any of the characters that are special in regular expressions, then you can cheat a bit, like this:
if (new RegExp(substrings.join("|")).test(string)) {
// At l...