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How to automatically install Emacs packages by specifying a list of package names?
... package)))
packages))
;; make sure to have downloaded archive description.
;; Or use package-archive-contents as suggested by Nicolas Dudebout
(or (file-exists-p package-user-dir)
(package-refresh-contents))
(ensure-package-installed 'iedit 'magit) ; --> (nil nil) if iedit and ma...
Build tree array from flat array in javascript
I have a complex json file that I have to handle with javascript to make it hierarchical, in order to later build a tree.
Every entry of the json has :
id : a unique id,
parentId : the id of the parent node (which is 0 if the node is a root of the tree)
level : the level of depth in the tree
...
How to detect online/offline event cross-browser?
...r agent will
not contact the network when the user
follows links or when a script
requests a remote page (or knows that
such an attempt would fail), and must
return true otherwise.
Finally, the spec notes:
This attribute is inherently
unreliable. A computer can be
connected to a network without ha...
Disable all table constraints in Oracle
...
It's not a single command, but here's how I do it. The following script has been designed to run in SQL*Plus. Note, I've purposely written this to only work within the current schema.
set heading off
spool drop_constraints.out
select
'alter table ' ||
owner || '.' ||
table...
Execute a command line binary with Node.js
...rpart. Documentation for them can be found here. While they are useful for scripting, do note that unlike the methods used to spawn child processes asynchronously, the synchronous methods do not return an instance of ChildProcess.
...
Why does GCC generate 15-20% faster code if I optimize for size instead of speed?
...nificantly. They attribute this to alignment of "hot loops".
This paper, titled "Producing wrong data without doing anything obviously wrong!" says that inadvertent experimental bias due to nearly uncontrollable differences in program running environments probably renders many benchmark results me...
How do I turn off Oracle password expiration?
...TER USER xyz_user IDENTIFIED BY new_password;
Below is a little SQL*Plus script that a privileged user (e.g. user 'SYS') can use to reset a user's password to the current existing hashed value stored in the database.
EDIT: Older versions of Oracle store the password or password-hash in the pword ...
Export a graph to .eps file with R
...
Another way is to use Cairographics-based SVG, PDF and PostScript Graphics Devices.
This way you don't need to setEPS()
cairo_ps("image.eps")
plot(1, 10)
dev.off()
share
|
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What is the cleanest way to get the progress of JQuery ajax request?
In plain javascript is very simple: need just to attach the callback to {XMLHTTPRequest}.onprogress
6 Answers
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How to show all shared libraries used by executables in Linux?
...nning the executable. Look at the source to ldd; on my system, it's a bash script. If the executable is statically linked and uses syscalls, and specifies a different loader, it can do arbitrary evil things. So don't use ldd on an executable you don't trust.
– Barry Kelly
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