大约有 11,643 项符合查询结果(耗时:0.0205秒) [XML]

https://stackoverflow.com/ques... 

Convert Data URI to File then append to FormData

... Just an idea: array=[]; array.length=binary.length; ... array[i]=bina... etc. So the array is pre-allocated. It saves a push() having to extend the array each iteration, and we're processing possibly millions of items (=bytes) here, so it matters. – DDS Mar 1...
https://stackoverflow.com/ques... 

Run command on the Ansible host

...at it does not make sense to delegate all tasks, debug, add_host, include, etc always get executed on the controller. Using this with the ‘serial’ keyword to control the number of hosts executing at one time is also a good idea: --- - hosts: webservers serial: 5 tasks: - name: take out...
https://stackoverflow.com/ques... 

Bootstrap throws Uncaught Error: Bootstrap's JavaScript requires jQuery [closed]

...u're in a Node/CommonJS + Browser environment (e.g. electron, node-webkit, etc..); the reason for this error is that jQuery's export logic first checks for module, not window: if (typeof module === "object" && typeof module.exports === "object") { // CommonJS/Node } else { // window...
https://stackoverflow.com/ques... 

How to cat a file containing code?

... document will undergo variable substitution, backticks will be evaluated, etc, like you discovered. If you need to expand some, but not all, values, you need to individually escape the ones you want to prevent. cat <<EOF >>brightup.sh #!/bin/sh # Created on $(date # : <<-- this ...
https://stackoverflow.com/ques... 

Password masking console application

...ressed does not correspond to a printable character, e.g. F1, Pause-Break, etc { pwd.AppendChar(i.KeyChar); Console.Write("*"); } } return pwd; } share | ...
https://stackoverflow.com/ques... 

Preview an image before it is uploaded

... @Raptor and so is the whole File API... (FileReader, input.files etc.) URL.createObjectURL is the way to go when dealing with user submitted files, it only creates an in-memory symlink to the real file on user's disk. – Kaiido Jul 2 '17 at 2:20 ...
https://stackoverflow.com/ques... 

How can I remove a character from a string using Javascript?

... /each char in this pattern/ So read as e, followed by a, followed by c, etc... Or a single <a character or set of charcters> could be characters described by a character class: /[123!y]/ //any one of these /[^123!y]/ //anything but one of the chars following '^' (very useful/performance e...
https://stackoverflow.com/ques... 

jQuery UI Tabs - How to Get Currently Selected Tab Index

...bID = curTab.prop("id"), curTabCls = curTab.attr("class"); // etc .... PS. If you use an iframe variable then .find('.ui-tabs-panel:not(.ui-tabs-hide)'), you will find it easy to do this for selected tabs in frames as well. Remember, jQuery already did all the hard work, no need to re...
https://stackoverflow.com/ques... 

Useful GCC flags for C

... Always use -O or above (-O1, -O2, -Os, etc.). At the default optimization level, gcc goes for compilation speed and doesn't do enough analysis to warn about things like unitialized variables. Consider making -Werror policy, as warnings that don't stop the compila...
https://stackoverflow.com/ques... 

Android Facebook style slide

...l a bit of lag compared to native. Not only the skeleton - the lists, map, etc. looks and feels native. At least with the current state of technology. – Ixx Jan 10 '13 at 14:12 ...