This can happen for instance when JQuery has not been fully loaded before trying to execute JQuery code.
Using $(document).ready(function($) is one way to solve this, as this should wait until JQuery is fully loaded.
<script type="text/javascript"> $(document).ready(function($) { //some awsome jquery code }); </script> |
To find the part of a string after the last \ using javascript the following can be used.
alert( this.value.substring(this.value.lastIndexOf("\\")+1) ); |
myString = "545.2222" float(myString) #545.2222 #or to round it of int(float(myString)) #545 #or to keep us safe in case the myString should be checked for "funny" values try: i = int(myString) except ValueError: i = 0 |
Specifying the JVM Eclipse should use is both a nice way to make sure it is correct now and to know that future upgrades/updates won’t mess with this.
This is done by specifying the -vm option in the “eclipse.ini” file.
Important bits to know about this:
Example eclipse.ini (for windows)
-startup plugins/org.eclipse.equinox.launcher_1.2.0.v20110502.jar --launcher.library plugins/org.eclipse.equinox.launcher.win32.win32.x86_64_1.1.100.v20110502 -product org.eclipse.epp.package.jee.product --launcher.defaultAction openFile --launcher.XXMaxPermSize 256M -showsplash org.eclipse.platform --launcher.XXMaxPermSize 256m --launcher.defaultAction openFile -vm C:\progra~1\Java\jdk1.6.0_26\bin\javaw.exe -vmargs -Dosgi.requiredJavaVersion=1.5 -Xms40m -Xmx512m |
In order to generate a skeleton javadoc when using Eclipse then “Shift”+”Alt”+”J” does this for the object/class/function Eclipse you are currently inside.
Something to keep in mind when starting the adventures of rapid prototyping (and 3D printing) – or for that matter during software development, is to consider what we need to create and do just that.
Pretotyping is about “Make sure you are building the right it before you built it right.”
A prototype is made to make sure we are building it right, but too seldom a pretotype is created to test that the right it is being built.
So the great idea with a pretotype is about failing early (with low costs) or starting making a prototype of the important bits.
The good thing with failing early is of course that we can move on to the next idea and sooner find the ideas that are worth developing.
A productype on the other hand is the opposite, when features are added before the need for them is identified. The following two comics from “Rep rap adventures” and “xkcd” both show the problem with launching too late (or productyping; witch is when features not realy needed are added), and this is part of why a pretotype is nice. The sooner we can find the right it (and that is what pretotying is about) the sooner we can make a prototype and get to the market sooner.
Based on my dayjob at wi.se I have drawn the conclusion that the pretotype should be used to find the right it, not a argument for making a cheaper prototype. Even if you get someone (like us) to do a prototype for you for free – that will not help at all if it is not for the right it. Also in a pretotype it is more common (and accepted, even liked) to cheat/pretend that functions are working or simply faking them, in a prototype more often features are there, but might be limited in function.
If you need to remove a file from the list of files about to be committed then “git reset” will undo the git add.
git reset somefile.java |
It will only remove it from the staging area, it will not change the contents of the file.
To change the branch you have checked out you use “svn switch url [PATH]” (the path is optional).
example:
svn switch https://example.com/svn/root/branches/thebranch . |
Also svn switch can be used to “relocate” the repository url – i.e. if the server has moved/changed address/ip or similar. “svn switch –relocate FROM TO [PATH]”
example:
svn switch --relocate https://old.example.com/svn/root/oldbranch https://new.example.com/svn/root/newbranch . |
warning: Only if the working copy still reflects the same repository directory, but the location of the repository itself has changed, then svn switch –relocate is safe to use.
Suppose we have a timestamp in the database and would like to convert it to a Unix timestamp
There is a function called getTime() that will return the unix time.
long messageTime = rs.getTimestamp("startTime", Calendar.getInstance(TimeZone.getTimeZone("UTC"))).getTime(); |
SELECT * FROM history_items WHERE timeofhistory=(SELECT MAX(timeofhistory) FROM history_items) |
The sub query will fetch the highest timestamp and then that is used as a condition for the query.
note: If you are using a version older than 8.1, then MIN and MAX is not able to use indexes, so instead use a ORDER BY and LIMIT clause
SELECT * FROM history_items ORDER BY timeofhistory DESC LIMIT 1 |
This will of course work for versions 8.1 and higher as well, it should be identical to MAX and MIN in time.