javascript - Why assigning a variable to itself memory=memory? -


i analysing javascript shell-code. here line script:

function having() {     memory = memory;     settimeout("f0vtp03y()", 2000); }

i don't quite understand memory = memory, what's point of assigning variable itself. appreciate help!

the reason can think of assign variable variable shadowing.

variable shadowing occurs when variable declared within scope (decision block, method, or inner class) has same name variable declared in outer scope. @ level of identifiers (names, rather variables), known name masking. outer variable said shadowed inner variable, while inner identifier said mask outer identifier. can lead confusion, may unclear variable subsequent uses of shadowed variable name refer to, depends on name resolution rules of language.

but in case, memory variable not parameter of function doesn't make sense.


Comments

Post a Comment

Popular posts from this blog

python - Selenium remoteWebDriver (& SauceLabs) Firefox moseMoveTo action exception -

while performing simple hover test on firefox through selenium (3.4.0) python bindings (3.4.3) using of available os in saucelabs (except linux, latest available firefox version old), performing following actionchain: hover = actionchains(driver) hover.move_to_element(elm_men_menu).perform() it throws following error: taceback: file [...] in testhover hover.perform() file "/usr/local/lib/python2.7/dist-packages/selenium/webdriver/common/action_chains.py", line 80, in perform action() file "/usr/local/lib/python2.7/dist-packages/selenium/webdriver/common/action_chains.py", line 290, in <lambda> command.move_to, {'element': to_element.id})) file "/usr/local/lib/python2.7/dist-packages/selenium/webdriver/remote/webdriver.py", line 256, in execute self.error_handler.check_response(response) file "/usr/local/lib/python2.7/...
Read more

html - How to custom Bootstrap grid height? -

why bootstrap grid has height 591.067 ? did height came ? .main-post { padding: 20px; background-color: #fff; border: 1px solid #d8d8d8; margin-bottom: 100px; } .main-post .post-categories { margin-bottom: 10px } .main-post h3 { margin: 0 0 10px; color: #777; letter-spacing: -1px; font-weight: bold } .main-post .post-author, .main-post .post-date, .main-post .post-comments { font-size: 12px } .main-post img { display: block; margin: 10px 0; } .main-post .post-summary { line-height: 1.7; color: #888 } .main-post { color: #999 } <div class="col-sm-6"> <div class="main-post"> <h3 class="post-title"> <a href="#"> post title </a> </...
Read more

transpose - Maple isnt executing function but prints function term -

im using maple im in worksheetmode tried using maple input , 2d input , want transpose matrix a: := `<|>`(`<,>`(1, .5, -2), `<,>`(.5, 9/4+b, 5+3*b), `<,>`(-2, 5+3*b, 18+9*b+4*a)); b:= transpose(a); when exectute sheet dont translated values, there same input. matrix looks same input matrix plus function term. you can see picture in following link: why arent functions executed? meanwhile b:=a^+ doing right way , transposed matrix. other functions return function body instead needed values... if using 2d input mode (the default) space you've got between transpose , bracketed (b) interpreted multiplcation. rid of such space. also, either load package @ start of document like, with(linearalgebra): before calling transpose command package, or call it's full name like, linearalgebra:-transpose(b);
Read more