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Command to change the default home directory of a user
...rname
usermod is the command to edit an existing user.
-d (abbreviation for --home) will change the user's home directory.
Change the user's home directory + Move the contents of the user's current directory:
usermod -m -d /newhome/username username
-m (abbreviation for --move-home) will mov...
How do I pass the this context to a function?
...
Javascripts .call() and .apply() methods allow you to set the context for a function.
var myfunc = function(){
alert(this.name);
};
var obj_a = {
name: "FOO"
};
var obj_b = {
name: "BAR!!"
};
Now you can call:
myfunc.call(obj_a);
Which would alert FOO. The other way around...
Why does using an Underscore character in a LIKE filter give me all the results?
... characters. Here you define the escape character with the escape keyword. For details see this link on Oracle Docs.
The '_' and '%' are wildcards in a LIKE operated statement in SQL.
The _ character looks for a presence of (any) one single character. If you search by columnName LIKE '_abc', it wi...
How to monitor the memory usage of Node.js?
...
A more up to date resource for hunting down memory leaks apmblog.dynatrace.com/2015/11/04/…
– saintedlama
Dec 1 '15 at 10:19
22
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List tables in a PostgreSQL schema
...nced users can use regular-expression notations such as character classes, for example [0-9] to match any digit. All regular expression special characters work as specified in Section 9.7.3, except for . which is taken as a separator as mentioned above, * which is translated to the regular-expressio...
Is there a date format to display the day of the week in java?
I know of date formats such as
"yyyy-mm-dd" -which displays date in format 2011-02-26
"yyyy-MMM-dd" -which displays date in format 2011-FEB-26
...
How to call Makefile from another Makefile?
... /path/to/project/gtest-1.4.0/make/Makefile . I'm attempting to have the former call the latter. In /path/to/project/makefile, I have
...
Create whole path automatically when writing to a new file
...
Use FileUtils to handle all these headaches.
Edit: For example, use below code to write to a file, this method will 'checking and creating the parent directory if it does not exist'.
openOutputStream(File file [, boolean append])
...
What does flushing the buffer mean?
... write of a byte is going to be very costly. So a common way to improve performance is to store the data that you are writing in a temporary buffer. Only when there is a lot of data is the buffer written to the file. By postponing the writes, and writing a large block in one go, performance is impro...
Why can't I center with margin: 0 auto?
...n it to overcome a bug
* in IE6 and below that doubles horizontal margins for floated elements)
* The styles below is the full style for the list-items.
*/
#header ul li {
color:#CCCCCC;
display:inline;
font-size:20px;
padding-right:20px;
}
...