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node/lib/console.js at https · reado/node · GitHub
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console.js
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var
writeError
=
process
.
binding
(
'stdio'
)
.
writeError
;
// console object
var
formatRegExp
=
/
%
[
s
d
j
]
/
g
;
function
format
(
f
)
{
var
util
=
require
(
'util'
)
;
if
(
typeof
f
!==
'string'
)
{
var
objects
=
[
]
;
for
(
var
i
=
0
;
i
<
arguments
.
length
;
i
++
)
{
objects
.
push
(
util
.
inspect
(
arguments
[
i
]
)
)
;
}
return
objects
.
join
(
' '
)
;
}
var
i
=
1
;
var
args
=
arguments
;
var
str
=
String
(
f
)
.
replace
(
formatRegExp
,
function
(
x
)
{
switch
(
x
)
{
case
'%s'
:
return
String
(
args
[
i
++
]
)
;
case
'%d'
:
return
Number
(
args
[
i
++
]
)
;
case
'%j'
:
return
JSON
.
stringify
(
args
[
i
++
]
)
;
default
:
return
x
;
}
}
)
;
for
(
var
len
=
args
.
length
,
x
=
args
[
i
]
;
i
<
len
;
x
=
args
[
++
i
]
)
{
if
(
x
===
null
||
typeof
x
!==
'object'
)
{
str
+=
' '
+
x
;
}
else
{
str
+=
' '
+
util
.
inspect
(
x
)
;
}
}
return
str
;
}
exports
.
log
=
function
(
)
{
process
.
stdout
.
write
(
format
.
apply
(
this
,
arguments
)
+
'\n'
)
;
}
;
exports
.
info
=
exports
.
log
;
exports
.
warn
=
function
(
)
{
writeError
(
format
.
apply
(
this
,
arguments
)
+
'\n'
)
;
}
;
exports
.
error
=
exports
.
warn
;
exports
.
dir
=
function
(
object
)
{
var
util
=
require
(
'util'
)
;
process
.
stdout
.
write
(
util
.
inspect
(
object
)
+
'\n'
)
;
}
;
var
times
=
{
}
;
exports
.
time
=
function
(
label
)
{
times
[
label
]
=
Date
.
now
(
)
;
}
;
exports
.
timeEnd
=
function
(
label
)
{
var
duration
=
Date
.
now
(
)
-
times
[
label
]
;
exports
.
log
(
'%s: %dms'
,
label
,
duration
)
;
}
;
exports
.
trace
=
function
(
label
)
{
// TODO probably can to do this better with V8's debug object once that is
// exposed.
var
err
=
new
Error
;
err
.
name
=
'Trace'
;
err
.
message
=
label
||
''
;
Error
.
captureStackTrace
(
err
,
arguments
.
callee
)
;
console
.
error
(
err
.
stack
)
;
}
;
exports
.
assert
=
function
(
expression
)
{
if
(
!
expression
)
{
var
arr
=
Array
.
prototype
.
slice
.
call
(
arguments
,
1
)
;
process
.
assert
(
false
,
format
.
apply
(
this
,
arr
)
)
;
}
}
;
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