noop

Date in Crontab email subject

由 非 Y 不嫁゛ 提交于 2021-01-07 01:35:59
问题 I have an ubuntu server where I schedule crontab processes like the following. 59 2 * * * : Backup Settings; ~/backup_settings.sh At the conclusion of the process, I will get an email with the subject line "Backup Settings ...". Essentially the noop function (:) does nothing with the words "Backup Settings". I would like to add today's date to the email subject. Naturally, I tried 59 2 * * * : $(date +%Y%m%d) Backup Settings; ~/backup_settings.sh but that doesn't result in the desired email

Date in Crontab email subject

由 喜你入骨 提交于 2021-01-07 01:34:03
问题 I have an ubuntu server where I schedule crontab processes like the following. 59 2 * * * : Backup Settings; ~/backup_settings.sh At the conclusion of the process, I will get an email with the subject line "Backup Settings ...". Essentially the noop function (:) does nothing with the words "Backup Settings". I would like to add today's date to the email subject. Naturally, I tried 59 2 * * * : $(date +%Y%m%d) Backup Settings; ~/backup_settings.sh but that doesn't result in the desired email

What command means “do nothing” in a conditional in Bash?

由 落花浮王杯 提交于 2020-12-27 07:28:30
问题 Sometimes when making conditionals, I need the code to do nothing, e.g., here, I want Bash to do nothing when $a is greater than "10", print "1" if $a is less than "5", otherwise, print "2": if [ "$a" -ge 10 ] then elif [ "$a" -le 5 ] then echo "1" else echo "2" fi This makes an error though. Is there a command which will do nothing and also not slow down my script? 回答1: The no-op command in shell is : (colon). if [ "$a" -ge 10 ] then : elif [ "$a" -le 5 ] then echo "1" else echo "2" fi From

Why is assert defined as (void)0?

由 邮差的信 提交于 2020-05-15 02:42:06
问题 Why #define assert(expression) ((void)0) , rather than #define assert(expression) is used in release mode?(strictly speaking, when NDEBUG is defined) I heard that there are some reasons, but I've forgot it. 回答1: ((void)0) defines assert(expression) to do nothing. The main reason to use it is that #define assert(expression) would allow assert(expression) to compile without a semicolon but it will not compile if the macro is defined as ((void)0) 回答2: The reason why ((void)0) is used in empty

How can I add a space between them and keep text same line

由 北战南征 提交于 2019-12-13 03:29:52
问题 how can I add a space between those 2 images and dont allow the text to break on the center of the page? It's for a college project and I've never programmed before. i actually dont know whats going on on this template i have to edit.. i just need to add a photo of a person in the image circle (which i know how to) and a text of their review, but the images keep going off position and text breaks in the middle.. /* Horizons by TEMPLATED templated.co @templatedco Released for free under the

ftplib python: NOOP command works in ASCII not Binary

由 一世执手 提交于 2019-12-12 14:14:07
问题 I have a threaded FTP script. While the data socket is receiving the data, a threaded loop sends NOOP commands to the control socket to keep control connection alive during large transfers. I am prevented from using the FTP.retrbinary() command as, if I want to keep the control connection alive I must separate the data and control sockets which retrbinary does not do. Code below: def downloadFile(filename, folder): myhost = 'HOST' myuser = 'USER' passw = 'PASS' #login ftp = FTP(myhost,myuser

What real purpose does $.noop() serve in jQuery 1.4?

由 落爺英雄遲暮 提交于 2019-12-03 14:23:21
问题 Pouring over the release notes regarding jQuery 1.4, I came acrosss $.noop() which is: Description : An empty function. (added in 1.4) You can use this empty function when you wish to pass around a function that will do nothing. Perhaps I'm missing something profound here, but what exactly is a practical use of passing around an empty function? Code examples appreciated. 回答1: This function was proposed due to performance issues on embedded systems when using $.ajax , reported on the jQuery

Simple C# Noop Statement

由 五迷三道 提交于 2019-12-03 05:28:07
问题 What is a simple Noop statement in C#, that doesn't require implementing a method? (Inline/Lambda methods are OK, though.) My current use case: I want to occupy the catch-block of a try-catch, so I can step into it while debugging and inspect the exception. I'm aware I should probably be handling/logging the exception anyway, but that's not the point of this exercise. 回答1: If you really want noop, then this defines a nameless action that doesn't do anything, and then invokes it, causing

What real purpose does $.noop() serve in jQuery 1.4?

由 两盒软妹~` 提交于 2019-12-03 05:13:55
Pouring over the release notes regarding jQuery 1.4, I came acrosss $.noop() which is: Description : An empty function. (added in 1.4) You can use this empty function when you wish to pass around a function that will do nothing. Perhaps I'm missing something profound here, but what exactly is a practical use of passing around an empty function? Code examples appreciated. CMS This function was proposed due to performance issues on embedded systems when using $.ajax , reported on the jQuery-Dev mailing list. You can see the thread . Basically, they preferred to introduce and use this single

Simple C# Noop Statement

由 拈花ヽ惹草 提交于 2019-12-02 18:47:14
What is a simple Noop statement in C#, that doesn't require implementing a method? (Inline/Lambda methods are OK, though.) My current use case: I want to occupy the catch-block of a try-catch, so I can step into it while debugging and inspect the exception. I'm aware I should probably be handling/logging the exception anyway, but that's not the point of this exercise. If you really want noop, then this defines a nameless action that doesn't do anything, and then invokes it, causing nothing to happen: ((Action)(() => { }))(); The standard empty statement/noop operation in c# is ; as in: if
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