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How to remove default value of input on focus

由 大兔子大兔子 提交于 2019-12-03 07:07:48
问题 I have an input box that has default value text assigned to it. How can I remove this text when the user focuses on the field:: CoDE <input type="text" name="kp1_description" value="Enter Keypress Description"> 回答1: $(document).ready(function(){ var Input = $('input[name=kp1_description]'); var default_value = Input.val(); Input.focus(function() { if(Input.val() == default_value) Input.val(""); }).blur(function(){ if(Input.val().length == 0) Input.val(default_value); }); })​ That should do it

How do I get the default value for a field in a Django model?

由 元气小坏坏 提交于 2019-12-03 06:36:22
问题 I have a Django model with some fields that have default values specified. I am looking to grab the default value for one of these fields for us later on in my code. Is there an easy way to grab a particular field's default value from a model? 回答1: You can get the field like this: myfield = MyModel._meta.get_field_by_name('field_name') and the default is just an attribute of the field: myfield.default 回答2: TheModel._meta.get_field('the_field').get_default() 回答3: As of Django 1.9.x you may use

For HTTP responses with Content-Types suggesting character data, which charset should be assumed by the client if none is specified?

由 好久不见. 提交于 2019-12-03 06:36:01
If no charset parameter is specified in the Content-Type header, RFC2616 section 3.7.1 seems to imply ISO8859-1 should be assumed for media types of subtype "text": When no explicit charset parameter is provided by the sender, media subtypes of the "text" type are defined to have a default charset value of "ISO-8859-1" when received via HTTP. Data in character sets other than "ISO-8859-1" or its subsets MUST be labeled with an appropriate charset value. However, I routinely see applications that serve up Javascript files with Content-Type values like "application/x-javascript" (i.e. no charset

Set default value for DateTime in optional parameter [duplicate]

由 孤街浪徒 提交于 2019-12-03 06:26:34
问题 This question already has answers here : C# 4.0: Can I use a TimeSpan as an optional parameter with a default value? (8 answers) Closed 6 years ago . How can I set default value for DateTime in optional parameter? public SomeClassInit(Guid docId, DateTime addedOn = DateTime.Now???) { //Init codes here } 回答1: There is a workaround for this, taking advantage of nullable types and the fact that null is a compile-time constant. (It's a bit of a hack though, and I'd suggest avoiding it unless you

map<int,int> default values

由 泪湿孤枕 提交于 2019-12-03 06:26:25
问题 std::map<int,int> mapy; ++mapy[5]; Is it safe to assume that mapy[5] will always be 1? I mean, will mapy[5] always get the default value of 0 before '++', even if not explicitly declared, as in my code? 回答1: As soon as you access the map with the [] operator, if the key doesn't exist it gets added. The default initializer of the int type gets invoked - so it will get a value of 0. 回答2: Yes, it is safe to assume. The map's operator[] is specified thus: ([map.access]) Effects: If there is no

jboss 5 changing default port

由 风流意气都作罢 提交于 2019-12-03 06:08:53
I am trying to change the default port on my jboss server to port 80. i have had a look around the web and i have had suggestions of editing this file jboss5\server\default\deploy\jbossweb.sar\server.xml which is fine. changing this file alone still does not fix the issue. There have also been suggestion to also change this file: jboss5\server\default\conf\bootstrap\bindings.xml Only problem is that i cant find this binding.xml Is the binding.xml file a standard in JBoss 5? Or has it been renamed or changes location in JBoss 5. Does anyone have any clear steps on changing the the default port

How to change the default project directory (folder) in Netbeans 6.9?

由 爷，独闯天下 提交于 2019-12-03 05:53:13
问题 How to change the default project directory in Netbeans 6.9 for Java SE\ME\EE? 回答1: I don't think you can make it module-specific but you can set it as follows: Close NetBeans Find the projectui.properties file. For me (Windows) it was under C:\Documents and Settings\Catchwa\.netbeans\6.9\config\Preferences\org\netbeans\modules\projectui.properties The projectsFolder=C:\\NetBeansProjects variable is I think what you want to change. 回答2: I found mine in a slightly different location (Windows 7

Default values for System.Threading.ThreadPool.SetMaxThreads

由 邮差的信 提交于 2019-12-03 05:52:10
Suppose, I don't set any values explicitly by calling the function: System.Threading.ThreadPool.SetMaxThreads What are the default values? It depends on the .NET framework version, changed in 2.0, 3.0 and 4.0. In 2.0 it was 50 times the number of cores. In 3.0 (aka 2.0 SP1) it was 250 times the number of cores, 4.0 made it dynamic depending on bitness and OS resources. Max I/O completion threads was always 1000 if I remember correctly. In general, it is insanely high and a program should never get close. On a 32-bit machine, the program is pretty likely to bomb with OOM first when all of those

So changed Git's default editor, now how do i invoke it from Git bash?

由 微笑、不失礼 提交于 2019-12-03 05:38:02
I've changed Git's default editor by applying the following to Git's global config: core.editor='C:/Program Files/Notepad++/notepad++.exe' -multiInst -notabbar -nosession -noPlugin Now, how do I simply invoke the "default editor" without initiating a commit ? I'm trying to test the settings/change I made. Thanks! Using Git version 1.8.1 Run git config -e To edit the configuration in the default editor. 来源： https://stackoverflow.com/questions/16451669/so-changed-gits-default-editor-now-how-do-i-invoke-it-from-git-bash

How to set the default to unfolded when you open a file?

由 ￡可爱￡侵袭症＋ 提交于 2019-12-03 05:30:28
问题 In my .vimrc I've put set foldmethod=syntax to enable folding of methods etc. However, I don't like the default that everytime I open a file, the whole thing is folded. Is there a way to enable foldmethod , yet have files unfolded when I open them? 回答1: set foldlevel=99 should open all folds, regardless of method used for folding. With foldlevel=0 all folded, foldlevel=1 only somes, ... higher numbers will close fewer folds. 回答2: You can put this in your .vimrc : au BufRead * normal zR It
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