In Case, you need to do a complete clone of an object in Javascript and you want the original to remain unaffected, then you probably can give this method a go. :)
Less than 8 more weeks to the end of 2014. And it's time to start the countdown for the last IT Show for the year 2014...
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Image taken from 'SITEX 2014' website. The venue for the upcoming event is pretty far, but it's worth travelling all the way down. As compared to the venue at 'Suntec Convention & Exhibition Centre', I prefer the huge spacious space at Singapore Expo. Most importantly, I can roam around the place freely and quickly, whhich is a very big (+). :) |
Frankly speaking, I don't have a fantastic memory and in case, you don't have a fantastic memory, you probably can use the following sites to search for useful examples and references. Even though these sites doesn't provide an example for all everything, but it's a great place to start searching.
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W3Schools This has been around for quite some time. Not only it covers 'Javascript', it also covers coding environment like 'PHP', 'SQL', 'ASP.NET', etc... Though most of the time it covers only the basic stuff, but it's a great place to get you started. |
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JavaScripture This covers JavaScript only. But with the number of examples that was provided on the site itself to demonstrate the usage of the different types of JavaScript syntax, makes this a pretty good place to start searching. |
If you have been using Apache Ant quite a bit, you will soon realize that it can be pretty annoying at times. You couldn't open up and read a file, you couldn't create Arrays, etc... Therefore there's actually a way to work around it. You can actually use Javascript + Java inside the Ant script environment. And on top of that you can actually manipulate simple basic Ant variables in the Javascript + Java environment.
<macrodef name="getIndexHtmlContents">
<sequential>
<script language="javascript">
<![CDATA[
//Import the necessary Java classes
importClass(java.io.File);
importClass(java.io.FileReader);
importClass(java.io.BufferedReader);
//We will be reading the value from the Ant Project Property 'filenameProp'
var filenameProp = GWR.getProperty("filenameProp");
//Then we will be using BufferedReader and FileReader to read the contents of the file
var reader = new BufferedReader(new FileReader(new File(filenameProp)));
//Next we will loop through all the contents of the file and store it in a temporary variable
var sCurrentLine;
var strEverything = "";
while ((sCurrentLine = reader.readLine()) != null) {
strEverything += sCurrentLine;
}
//We will printout the contents of the file/temporary variable on the ant console output
println(strEverything);
//Writing the value of the temporary variable and saing it in the Ant Project Property 'fileContents'
GWR.setProperty("fileContents", strEverything);
]]>
</script>
</sequential>
</macrodef>
Though you have specified that you will be writing some script in 'Javascript' syntax, it actually allows Java codes to be written inside that <script> block too.In the Linux environment, it is pretty easy to loop through a particular type of files to find and replace a particular string using shell script. I hope this helps.
| The following will give you an idea how to get it done. You need to replace all the {value} with the corresponding values. |
#!/bin/bash
varReplace={string_to_replace}
find ./{the_folder}/ -name \*.{file_extension} -type f -print0 | while read -d $'\0' file; do
echo "Processing $file"
sed -i 's/{string_to_look_for}/'$varReplace'/g' $file
done
| The following example will go through all the files with extension (.js) in the folder 'output', find the string '{my_version}' and replace it with the string 'v1.0.122'. |
#!/bin/bash
varReplace=v1.0.122
find ./output/ -name \*.js -type f -print0 | while read -d $'\0' file; do
echo "Processing $file"
sed -i 's/{my_version}/'$varReplace'/g' $file
done
Well basically this is a post meant for myself. I keep forgetting how to get this done. Basically this is a simple implementation of a Timer in Javascript.
Well, there might be situations that you need to limit the number of characters that you are allowing the user to enter in a numerical text field. Therefore, here's a fix for angularJS.