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Class: IO

Inherits:
Object show all
Defined in:
opal/stdlib/nodejs/io.rb

Direct Known Subclasses

File , StringIO

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initializeIO

Returns a new instance of IO

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# File 'opal/stdlib/nodejs/io.rb', line 26
def initialize
 @eof = false
 @lineno = 0
end

Instance Attribute Details

#eofObject (readonly)

Returns the value of attribute eof

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# File 'opal/stdlib/nodejs/io.rb', line 23
def eof
 @eof
end

#linenoObject (readonly)

Returns the value of attribute lineno

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# File 'opal/stdlib/nodejs/io.rb', line 24
def lineno
 @lineno
end

Class Method Details

.binread(path) ⇒ Object

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# File 'opal/stdlib/nodejs/io.rb', line 80
def self.binread(path)
 `return executeIOAction(function(){return __fs__.readFileSync(#{path}).toString('binary')})`
end

.read(path) ⇒ Object

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# File 'opal/stdlib/nodejs/io.rb', line 35
def self.read(path)
 File .read (path)
end

.write(path, data) ⇒ Object

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# File 'opal/stdlib/nodejs/io.rb', line 31
def self.write(path, data)
 File .write (path, data)
end

Instance Method Details

#each_line(separator = $/, &block) ⇒ Object

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# File 'opal/stdlib/nodejs/io.rb', line 50
def each_line(separator = $/, &block)
 if @eof
 return block_given? ? self : [].to_enum
 end
 if block_given?
 lines = File .read (@path)
 %x{
 self.eof = false;
 self.lineno = 0;
 var chomped = #{lines.chomp},
 trailing = lines.length != chomped.length,
 splitted = chomped.split(separator);
 for (var i = 0, length = splitted.length; i < length; i++) {
 self.lineno += 1;
 if (i < length - 1 || trailing) {
 #{yield `splitted[i] + separator`};
 }
 else {
 #{yield `splitted[i]`};
 }
 }
 self.eof = true;
 }
 self
 else
 read.each_line
 end
end

#readObject

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# File 'opal/stdlib/nodejs/io.rb', line 39
def read
 if @eof
 ''
 else
 res = `executeIOAction(function(){return __fs__.readFileSync(#{@path}).toString()})`
 @eof = true
 @lineno = res.size
 res
 end
end

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