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Join Date: Jul 2006
Posts: 73
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Junior Poster in Training
Hi, folks.
I have written some pretty complicated programs in Javascript (in terms of the code itself), but I haven’t experimented much with the nuts-and-bolts of Javascript. In particular, I have written all my programs as single blocks of code. For example, I have written several programs to solve for the eigenvalues and eigenvectors of matrices. One page solves for a 3 x 3 matrix, one for a 4 x 4 matrix, one for a 5 x 5 matrix, etc. Each javascript program is on its own page and takes the following form:
The algorithm for actually calculating the eigenvalues and eigenvectors does not change depending upon matrix size, it is included in the BIG BLOCK OF CODE.
What I am hoping to do now is turn the code block for the BIG BLOCK OF CODE into an external file, and have the several programs refer to it. That way, I won't have six programs include the same big block of code; they can all refer to the same external file--saving space on the server. For example:
Is what I want to do possible? How seamlessly does Javascript transmit data between seemingly independent code blocks?
I have written some pretty complicated programs in Javascript (in terms of the code itself), but I haven’t experimented much with the nuts-and-bolts of Javascript. In particular, I have written all my programs as single blocks of code. For example, I have written several programs to solve for the eigenvalues and eigenvectors of matrices. One page solves for a 3 x 3 matrix, one for a 4 x 4 matrix, one for a 5 x 5 matrix, etc. Each javascript program is on its own page and takes the following form:
<script language="javascript" type="text/javascript">
<!--Define JavaScript function.-->
function OneBigProgram(dataForm){
// Code to input the matrix elements for the specifically-sized matrix
. . .
// Code to calculate the eigenvalues and eigenvectors
// BIG BLOCK OF CODE
. . .
// Code to output the results for the specifically-sized matrix
. . .
// end of JavaScript-->
</script>The algorithm for actually calculating the eigenvalues and eigenvectors does not change depending upon matrix size, it is included in the BIG BLOCK OF CODE.
What I am hoping to do now is turn the code block for the BIG BLOCK OF CODE into an external file, and have the several programs refer to it. That way, I won't have six programs include the same big block of code; they can all refer to the same external file--saving space on the server. For example:
<script language="javascript" type="text/javascript">
<!--Define JavaScript function.-->
function A_Smaller_Program_Input(dataForm){
// Code to input the matrix elements for the specifically-sized matrix
. . .
// end of JavaScript-->
</script><script language="javascript" type="text/javascript" src="RoutineforEigenvalues.js"> </script>
function A_Smaller_Program_Output(dataForm){
// Code to output the results for the specifically-sized matrix
. . .
// end of JavaScript-->
</script>Is what I want to do possible? How seamlessly does Javascript transmit data between seemingly independent code blocks?
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Join Date: Dec 2007
Posts: 75
Reputation:
Rep Power: 1
Solved Threads: 10
Junior Poster in Training
You have the right syntax. Just save your program as eigenValues3.js and then if you want to write a program that needs that file you just "import" it as follows:
Note: 1. You do not have to do the "import" within the <head> tag. It could have done withing the <body> tag.
2. <script> tags that are used to import files cannot enclose javascript code (or at least this was the case last time I tested this about 1yr ago). That's why I have two <script> tags above. The first one to import the file. The second to write my code for my local/current page.
3. You do not need language="javascript". Providing type="text/javascript" will suffice.
<html> <head> <script type="text/javascript" src="eigenValue3.js"></script> <script type="text/javascript"> //The code that will use the functions in eigenValue3.js goes here </script> </head> <body>... </body> </html>
Note: 1. You do not have to do the "import" within the <head> tag. It could have done withing the <body> tag.
2. <script> tags that are used to import files cannot enclose javascript code (or at least this was the case last time I tested this about 1yr ago). That's why I have two <script> tags above. The first one to import the file. The second to write my code for my local/current page.
3. You do not need language="javascript". Providing type="text/javascript" will suffice.
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